REST APIs are the interface between clients and servers that allows for data to be shared across platforms, providing a seamless connection between applications, databases, and other resources. A REST API Developer is the programmer who helps clients connect their applications to a certain platform and ensure data is flowing between the two in an efficient, secure manner. This can help to reduce friction, improve performance & scalability, boost security, streamline website navigation, and more.

REST API Developers build and maintain custom programming to enable automated data retrieval and communication with a client’s desired application or platform. This can encompass services such as quickly integrating third-party payment systems into an existing website, minimizing manual work and improving customer experience. They may also incorporate priority systems; for example creating different APIs for handling bulk vs single requests for heavy workloads. Ultimately a REST API Developer helps clients bridge the gap between complex platforms and transform data into valuable business insights.

Here’s some projects that our expert REST API Developers made real:

  • Establishing communication between different applications
  • Creating priority systems for managing large volumes of requests
  • Integrating third-party payment systems into an existing website
  • Developing programming to seamlessly retrieve dynamic data
  • Designing secure connections to protect confidential information

Our highly-skilled REST API Developers are experts when it comes to stitching together the critical links which connect disparate platforms together. With years of experience they have been able to tackle innumerable projects which have led to successful outcomes for our clients. If you have an issue related to connecting your application with another platform or require automated data retrieval services then you can post your own project here on Freelancer.com and hire one of our experienced developers today!

Müşterilerimiz, REST API Developers freelancerlarımızı 47,531 değerlendirme içinden 5 üzerinden 4.91 ile derecelendirdi.
REST API Developers İşe Alın

REST APIs are the interface between clients and servers that allows for data to be shared across platforms, providing a seamless connection between applications, databases, and other resources. A REST API Developer is the programmer who helps clients connect their applications to a certain platform and ensure data is flowing between the two in an efficient, secure manner. This can help to reduce friction, improve performance & scalability, boost security, streamline website navigation, and more.

REST API Developers build and maintain custom programming to enable automated data retrieval and communication with a client’s desired application or platform. This can encompass services such as quickly integrating third-party payment systems into an existing website, minimizing manual work and improving customer experience. They may also incorporate priority systems; for example creating different APIs for handling bulk vs single requests for heavy workloads. Ultimately a REST API Developer helps clients bridge the gap between complex platforms and transform data into valuable business insights.

Here’s some projects that our expert REST API Developers made real:

  • Establishing communication between different applications
  • Creating priority systems for managing large volumes of requests
  • Integrating third-party payment systems into an existing website
  • Developing programming to seamlessly retrieve dynamic data
  • Designing secure connections to protect confidential information

Our highly-skilled REST API Developers are experts when it comes to stitching together the critical links which connect disparate platforms together. With years of experience they have been able to tackle innumerable projects which have led to successful outcomes for our clients. If you have an issue related to connecting your application with another platform or require automated data retrieval services then you can post your own project here on Freelancer.com and hire one of our experienced developers today!

Müşterilerimiz, REST API Developers freelancerlarımızı 47,531 değerlendirme içinden 5 üzerinden 4.91 ile derecelendirdi.
REST API Developers İşe Alın

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    Overview: We’re looking for an experienced SuiteCRM developer/designer to help us customise a new SuiteCRM 8.9 installation for our sales team. The goal is to create a modern, user-friendly CRM interface that matches our visual designs and delivers a smooth, efficient experience similar to and Zoho CRM. Key Objectives: • Install SuiteCRM 8.9 on our web server (latest version). • Build a custom SuiteCRM theme (no prebuilt themes) to match our provided designs. • Streamline the sales process: intuitive in-line edits, pop-up windows, quick lead management that matches the visual styling of and Zoho CRM. • Develop and refine multiple modules • Integrate with Google Calendar (2-way), email sync, and lead enrichment APIs (, Apollo, , etc.). • Implement dupl...

    €165 Average bid
    €165 Ortalama Teklif
    22 teklifler

    Full Time position E-commerce Company US Tampa HQ Remote Responsibilities: Odoo 18 Development: Architect and develop custom modules, themes, and features specifically for the Odoo 18 environment. Web & Portal Optimization: Design and implement responsive, user-friendly web pages and portals using OWL, QWeb, and SCSS. System Integration: Build and maintain REST APIs to connect Odoo with third-party logistics, payment gateways, and marketing tools. Performance Tuning: Optimize database queries (PostgreSQL) and front-end performance to ensure high-speed user interactions. Technical Leadership: Lead version upgrades, refactor legacy code, and establish best practices for version control using Git. Technical & Qualifications: 5+ years of professional experience in Odoo development ...

    €12 / hr Average bid
    €12 / hr Ortalama Teklif
    55 teklifler

    I need our ServiceNow instance to automatically open incidents every time Dynatrace raises a problem. The goal is simple: as soon as Dynatrace detects performance degradation, a service outage, or an application error, a properly populated incident must appear in ServiceNow with no human intervention. Here is what I expect: • One-way integration: Dynatrace is the sole trigger. • Use native capabilities first (Dynatrace problem notifications, ServiceNow REST API) before custom code. • Map Dynatrace problem fields to the correct ServiceNow incident attributes (category, impact, urgency, assignment group, short description, full problem JSON in the work notes). • Prevent duplicate tickets while a problem remains open; update or resolve the existing record when Dyna...

    €43 Average bid
    €43 Ortalama Teklif
    5 teklifler

    I need this whole UI templated to be working with all teh configa nd best practise.

    €280 Average bid
    €280 Ortalama Teklif
    53 teklifler

    Tengo un formulario ya operativo en CodeIgniter 3 y quiero que procese un pago único usando tanto MercadoLibre como Webpay. Necesito lo siguiente: • Conectar ambos gateways mediante sus SDK oficiales o vía llamada directa a la REST API. • Gestionar el flujo completo (creación del pago, redirección, callback/confirmación) y mostrar pantallas de éxito o error. • Guardar en mi base de datos los campos Transacción ID y Monto pagado en el modelo correspondiente. • Mantener la estructura MVC de CodeIgniter 3 y documentar dónde añadir claves, tokens y credenciales. • Entregar el código comentado y un breve instructivo para pruebas sandbox y paso a producción. Cuento con acceso al servid...

    €135 Average bid
    €135 Ortalama Teklif
    51 teklifler

    We’re expanding the next round of services at Inboxlogy, and we’re looking for a freelance backend developer to help us build new features on top of our existing application. About Inboxlogy, Inboxlogy helps businesses grow 10X faster by setting up scalable email outreach infrastructure and providing cost-effective deliverability solutions. Our core system is already built — now we’re enhancing it with new modules and advanced functionality. What You’ll Work On You’ll be responsible for backend feature development and system enhancements, including: * Building and enhancing REST APIs using Java + Spring Boot * Designing scalable business logic and service layers * Working closely with the front-end team to support new features * Integrating with MongoD...

    €75 Average bid
    €75 Ortalama Teklif
    19 teklifler
    Real-Time POS Inventory Sync
    6 gün left
    Onaylı

    I need a small middleware service that can pull live inventory levels from a third-party POS platform (it’s not Shopify, Square, or Lightspeed—so please be comfortable discovering or reverse-engineering a different API or database schema). The single purpose is to keep my own server in sync with whatever is on the POS in real time. Here’s what the job looks like from my side: • Goal Every sale or stock adjustment in the store should trigger, or at least very quickly reflect, a quantity update on my server so the numbers stay accurate across all of my channels. • Flow I’m picturing 1. Authenticate to the POS (REST, GraphQL, WebSocket, direct DB—whatever the platform offers). 2. Detect inventory changes continuously—ideally through a web...

    €251 Average bid
    €251 Ortalama Teklif
    21 teklifler

    We are building a service marketplace mobile application (similar concept to UrbanClap / Ola / Uber for services) where users can book nearby service providers such as plumbers, electricians, cleaners, healthcare attendants, etc. We are looking for an experienced React Native App Developer / Team who can develop the complete mobile app ecosystem along with backend integration. Development of two separate mobile apps: User App Service Provider App With one centralized backend & admin panel. User App Features • User Registration & Login (OTP / Email) • Profile creation & management • Location detection (Auto + Manual) • Nearby service provider listing • Service booking system • Live service tracking (Map based) • In-app chat with provid...

    €150 Average bid
    €150 Ortalama Teklif
    63 teklifler

    Most of the core application is already live, but I need a reliable Python/Django developer who can step in quickly and bring the project to the finish line. Here is what I still need: • Add new features that plug smoothly into the current codebase. • Polish and extend existing functionality so workflows feel seamless for end-users. • Track down and fix the lingering bugs we’ve logged. • Refresh selected user-interface screens while keeping the existing design language. • Tweak backend logic where necessary to support the updated UI. The stack is pure Python/Django, so deep familiarity with Django models, views, templates, DRF, and common third-party packages is essential. You should also be comfortable working in Git, writing clear commit messages,...

    €142 Average bid
    €142 Ortalama Teklif
    78 teklifler
    AI deployment with Backend
    6 gün left
    Onaylı

    I need to design the workflow for an LLM orchestrator, integrating with various systems. It should call the customer master DB and policy admin to identify existing clients or handle new quotes. For new cases, I'll clearly differentiate based on line of business (P&C personal auto, commercial, travel, life Insurance) . I'll focus on setting up the necessary infrastructure, models, vector DB, middleware, and PoC milestones. Citations will be needed . I’ll ensure everything fits within the architecture, including tool-calling patterns and structured forms. Here’s a concrete, LOB aware architecture you can actually brief to a dev partner or internal team. I want to embed an end-to-end AI layer into my insurance website that can greet visitors, guide them through quo...

    €467 Average bid
    €467 Ortalama Teklif
    97 teklifler

    I’m building a browser-based stock management platform and I’d like it developed with the classic MERN-style pairing of React (frontend) and Express with PostgreSQL (backend and database). The system will be accessed externally by both Suppliers and Customers, so clean, responsive UI components and a secure REST API are essential. Core scope The application must let us track inventory in real time, move orders through their full life-cycle, and surface clear reporting and analytics dashboards. Three permission tiers will exist—Admin, Manager, and Viewer—each seeing only the screens and actions appropriate to their role. Tech expectations React 18 with functional components and hooks, Express 4+, PostgreSQL 14+ with well-structured schemas, and JWT-based authen...

    €1756 Average bid
    €1756 Ortalama Teklif
    102 teklifler

    I need someone to help me setup a system to manage accounts. I do have a gps tracking system where we charge clients monthly a fee to use the system. Some clients have multiple login account, these need to be grouped together so when a client dont pay we dont close 1 and miss to close the others and he will keep tracking on other account. We receive cash payments, swipe and bank transfer. We use freshbooks to process payments and based on open invoices we close accounts on my server website. I need someone to help me with creating a system to manage things and maybe help me keep in track of new clients and existing clients. Maybe create something or a website or somehow a way to keep informations accurate

    €122 Average bid
    €122 Ortalama Teklif
    79 teklifler

    This project is a new social networking platform that needs end-to-end development on the MERN stack. The goal is to deliver a scalable, secure web application where users can create accounts, interact in real time and consume dynamic content. Core work spans the full stack: designing MongoDB collections, building an Express/Node.js backend with REST or GraphQL endpoints, and crafting a responsive React front-end. Real-time features (chat or live updates) should leverage or a comparable solution. Clean, well-commented code in a Git repository and deployment to a staging server are essential. Deliverables: • MVP deployed to a test server with sign-up/login and editable user profiles • Documented API plus a concise README for local setup • Two weeks of post-launch...

    €839 Average bid
    €839 Ortalama Teklif
    37 teklifler

    More details: What is the primary goal of your performance testing? Check load capacity How many concurrent users should the JMeter scripts simulate? Up to 100 users What types of REST API calls do you need to test? GET requests, POST requests, PUT/DELETE requests

    €18 Average bid
    €18 Ortalama Teklif
    14 teklifler

    We’re hiring a reliable full-stack developer to maintain and improve an existing web platform built with and Laravel. This is an ongoing role for someone who can ship clean, scalable code and help us move quickly without sacrificing quality. What you’ll do * Maintain and improve our current + Laravel codebase * Build new features end-to-end (UI, APIs, database changes) * Fix bugs, optimize performance, and improve reliability * Write clear, maintainable code with solid testing practices * Collaborate on technical decisions and suggest practical solutions Requirements * Strong hands-on experience with and Laravel * Experience building and consuming REST APIs * Solid SQL/database skills (MySQL or PostgreSQL) * Comfortable working in Git-based workflows and code reviews * Str...

    €8 / hr Average bid
    €8 / hr Ortalama Teklif
    135 teklifler

    I need our web-based CRM, currently built in React, re-implemented as fully native apps for both iOS and Android. The existing REST and GraphQL endpoints are stable, so the job is mostly about translating interface logic and screens into Swift (or Objective-C) and Kotlin/Java while keeping parity with the browser version. Core functionality to reproduce • Secure user authentication with profile management • Full customer management workflow (create, edit, segment, assign, delete) • Analytics and reporting dashboards identical to the web charts and tables Design requirements The mobile UI must replicate the current design pixel for pixel. All colours, typography, spacing, and animations already exist in Figma; simply mirror them exactly so our users experience no ...

    €818 Average bid
    €818 Ortalama Teklif
    174 teklifler

    I am commissioning a bilingual iOS application—Arabic first, English second—that delivers live Bitcoin and selected-coin data with a professional, sleek interface entirely in Swift and SwiftUI. The app’s core revolves around real-time price feeds, historical price charts, and razor-sharp alerts that keep users ahead of major market moves. Arabic users will enjoy a true RTL layout, while English users see a standard LTR presentation, all driven by Apple’s native localization tools. Key functionality I need implemented: • Current price updates streamed from a reliable REST source • Historical price charts for deeper context • Push notifications for major price changes via Firebase Cloud Messaging • In-app alerts that surface whale activity...

    €2111 Average bid
    €2111 Ortalama Teklif
    131 teklifler
    Resolve Flutter Signup Issue
    5 gün left
    Onaylı

    I need a sharp-eyed Flutter / Node.js troubleshooter to pinpoint and fix an intermittent signup failure in my mobile app. The OTP step completes successfully, yet many users (on both iOS and Android) hit a wall when the form tries to create the account. No explicit error is returned to the UI, but the account never appears in the database. Here is what I can share right away: • Front end: Flutter 3.x, using MSG91 for phone-based OTP. • Back end: Node.js (Express) REST API, MongoDB. • Flow: user enters phone → receives OTP → OTP verified → form posts profile details → failure occurs after the POST. What I need from you is a fast, reproducible diagnosis, a clean code fix (whether in Dart, the REST endpoint, or both), and a short hand-off note so my te...

    €118 Average bid
    €118 Ortalama Teklif
    45 teklifler

    I want to develop an iPhone application using SwiftUI that allows users to download videos from social media platforms, including: Twitter (X) Instagram TikTok YouTube Core Features Clean, modern, and minimal SwiftUI design Input field to paste the video URL Fetch available video qualities (e.g. 720p, 1080p, audio only) Download progress indicator Background download support Save videos to the device (Photos / Files) Error handling for invalid or unsupported links Technical Requirements Built with SwiftUI iOS 16+ MVVM architecture Async/Await networking Proper permission handling for media storage API / Backend Integration The app should integrate with one of the following tools/APIs: Option 1: Use Social Media Downloader API Option 2: Use yt-dlp as a backend service...

    €145 Average bid
    €145 Ortalama Teklif
    84 teklifler
    Módulo Wompi SV para Odoo18
    5 gün left
    Onaylı

    Quiero contar con un módulo payment_wompi_sv completamente funcional para Odoo 18 que conecte mi sistema con la API REST de Wompi El Salvador. Alcance principal • Permitir pagos tanto en facturas emitidas desde Contabilidad como en el sitio web/e-Commerce, todo dentro del flujo estándar de Odoo. • Procesar transacciones únicas y recurrentes, recuperando cada estado mediante webhooks oficiales de Wompi. • Ejecutar la validación requerida de Confirmación del pago antes de registrar el movimiento contable. Requerimientos técnicos – Usar los endpoints y firmas indicados en la documentación (). – Implementar manejo de tokens, HMAC SHA-256 o el método de firma que exija la pasarela para garantizar in...

    €136 Average bid
    €136 Ortalama Teklif
    30 teklifler

    We’re Hiring Web Developers DJ Technologies LTD is looking to hire 2 skilled Web Developers to join our growing development team. Key Responsibilities & Requirements: • Strong knowledge of HTML, CSS, JavaScript • Experience with frameworks/CMS such as React, Laravel, or WordPress • Ability to write clean, efficient, and scalable code • Strong problem-solving and communication skills Join us and be part of a team delivering high-quality digital solutions. Company LinkedIn Profile: Regards, DJ Technologies LTD

    €1653 Average bid
    €1653 Ortalama Teklif
    70 teklifler

    I need a cloud-based Payment collection app that lets my staff and customers settle invoices through UPI AND CASH while also giving us the option to record UPI, Cash, Cheque receipts in one place. Think of it as a lightweight, multi-tenant service we can log into from any browser or phone, issue a payment link or on-screen QR, mark physical cash or cheque as “received”, and instantly see it reflected in a consolidated dashboard. Core flow • A customer or field agent chooses UPI, Cash, or Cheque. • For UPI we present a dynamic QR or intent link and verify the callback. • Cash and cheque entries let the user capture amount, payer, reference photo, and status (for cheques: pending, cleared, bounced). • Every transaction updates real-time reports, sends...

    €1385 Average bid
    €1385 Ortalama Teklif
    51 teklifler

    I have an informational web application to be built and prefer to work with freelancers who are already based in Bengaluru so we can easily align on occasional in-person discussions and faster iterations. The project centres on a clean, responsive site that presents curated content rather than e-commerce or social networking features. Core requirements include: • Front-end: modern, component-based framework (React, Vue or similar) with SSR or strong SEO support. • Back-end: lightweight REST or GraphQL service, preferably in Node.js or Python, with clear separation of concerns and straightforward deployment to a standard cloud stack (AWS, GCP or Azure—whichever you are most comfortable with). • CMS or admin interface that lets non-technical staff update text, imag...

    €8 / hr Average bid
    €8 / hr Ortalama Teklif
    44 teklifler

    I need an Android social-networking app built from scratch. The core idea is a clean, modern platform where users can register, create profiles, add or follow friends, share text-photo-video posts in a scrolling feed, chat in real time, and receive push notifications. A lightweight admin panel for content moderation is also required. Please deliver: • Full Android Studio project (Kotlin preferred, Java acceptable) with well-commented source code • REST or Firebase backend setup, documented and ready for deployment • Brief UX prototype early in the process and a functional MVP roughly six weeks from kickoff • Clear installation guide and API documentation so I can extend or port it to iOS later Material Design guidelines should steer the UI. I’m happy to su...

    €8 / hr Average bid
    €8 / hr Ortalama Teklif
    46 teklifler

    I’m building a secure, full-featured e-commerce solution that runs smoothly on iOS, Android, and the Web. The core stack can lean on Python for the API layer, with Java or C++ wherever high-performance modules make sense, but I’m open to a workflow you can justify that keeps code clean, well-documented, and easy to maintain. Core scope The first release must cover user account management (registration, login, password reset, profile editing) and end-to-end payment processing with major gateways. A responsive storefront, basic product catalogue, and an admin dashboard will round out the MVP. UX consistency across mobile and web is essential, and I’d like to see thoughtful error handling, secure data storage, and unit tests from day one. Deliverables for this milestone ...

    €514 Average bid
    €514 Ortalama Teklif
    222 teklifler

    I need an Android app that lets my field-marketing reps see their entire day laid out on Google Maps, record every turn they take, and automatically total the distance they cover. Each sales call is flagged as a Meeting Point marker so the team can tap it, log arrival and departure time, and have the visit counted in their daily report. Core flow • Reps start a “shift”, the app begins GPS tracking in the background and draws the live route on the map. • Every time they reach a preset Meeting Point, the app recognises the stop, time-stamps it, and asks for a quick note or photo. • When they end the shift, the app stores a summary: full polyline of the route, total distance travelled, list of visited Meeting Points, and idle time between stops. A simple d...

    €87 Average bid
    €87 Ortalama Teklif
    15 teklifler

    I’m ready to move quickly on a native Android app focused on trading. The core idea is to give users a clean, fast interface where they can monitor real-time market data, place trades, and review their portfolio on the go. Here’s what I need from you: • A production-ready Android application written in Kotlin (Java is acceptable if you have a strong case). • Secure user authentication and encrypted storage of sensitive data. • Real-time price feeds pulled from a well-documented REST or WebSocket API that I’ll provide. • Trade execution workflows (place, modify, cancel) with robust error handling. • Responsive UI that follows current Material Design guidelines and looks solid on phones and small tablets. • A concise README and c...

    €194 Average bid
    €194 Ortalama Teklif
    16 teklifler

    I need a lightweight, real-time chat application built exclusively for Android phones. The core focus is text messaging—no voice calls or media sharing for this version—so the interface and back-end can stay streamlined and fast. Key goals • Smooth one-to-one text conversations with instant message delivery and read receipts • Simple, clean UI that feels native to modern Android versions • Push notifications for new messages when the app is in the background • Secure user authentication (email, phone, or social sign-in—whichever you recommend) • Cloud-hosted database for message storage and basic user profiles You’re free to choose the stack you know best (Firebase, AWS Amplify, Supabase, or a custom REST/WebSocket back-end) ...

    €17 / hr Average bid
    €17 / hr Ortalama Teklif
    45 teklifler

    Quiero poner en marcha un sistema de atención automática que combine los flujos visuales de con la potencia de OpenAI y con mi propio servidor en Hostinger como núcleo de datos y alojamiento de los webhooks. La meta es que cada consulta que llegue por WhatsApp se resuelva en segundos con la información más reciente de mi negocio, sin depender de servicios de terceros costosos. Alcance técnico • Flujos en conectados a OpenAI (chat-completion). • Webhooks alojados en mi cuenta de Hostinger que reciban y envíen datos a WhatsApp de forma segura (HTTPS + token), evitando cuellos de botella. • Base de datos en Hostinger (trabajo normalmente con MySQL allí) para que la IA consulte información del cliente, inven...

    €138 Average bid
    €138 Ortalama Teklif
    30 teklifler

    I have a live React.js application that needs a refresh on both looks and behavior. I will hand over all existing code, REST APIs, and design references; what I need is a developer who can quickly plug in and push the project forward. First, the interface needs attention. Several screens require a new layout structure and an updated color palette that aligns with our latest brand guidelines. I’ll supply Figma frames so you can translate them into clean, responsive JSX and CSS (or styled-components if you prefer). Alongside the visual lift, some functional pieces must evolve. A couple of small-to-medium features are still on the backlog, and a few of our current components need polishing to make them more robust. All calls to the backend are already exposed—your task is to wir...

    €61 Average bid
    €61 Ortalama Teklif
    33 teklifler

    Your bid MUST include answers to the 5 questions at the bottom of this posting or it will be immediately rejected. We're a UK-based eSIM and mobile network company launching a branded international calling service. We need an experienced developer to fork, rebrand, and customise the WebTrit Phone open-source softphone app and get it published to both app stores. IMPORTANT: Read this entire posting carefully. There are specific questions at the bottom you MUST answer. Generic proposals will be rejected immediately. What is WebTrit? WebTrit Phone is a Flutter/Dart softphone app that uses WebRTC for voice and video calling. It connects to SIP-based VoIP systems via a REST API. The full source code is available on GitHub. What We Need Done Phase 1 — Fork & Rebrand Fork the Web...

    €425 Average bid
    €425 Ortalama Teklif
    93 teklifler

    Ya tengo el diseño inicial de la interfaz construido con V0 de Vercel en Next .js. Ahora necesito que lo conviertas en una aplicación funcional que: • Reciba y almacene datos de usuario junto con los documentos que ellos mismos suban. El usuario deberá aceptar "términos y condiciones" ya que está subiendo información confidencial • Guarde todo en una base SQL; me da igual MySQL o PostgreSQL mientras quede bien estructurado y con migraciones incluidas. • Exponga un API REST para altas, bajas, cambios y consultas, de forma que mi equipo pueda consumirla sin fricción. • Ofrezca un pequeño panel interno (puede ser dentro del mismo Next .js) para visualizar y filtrar la información almacenada. ...

    €410 Average bid
    €410 Ortalama Teklif
    115 teklifler

    I need a production-ready Flutter Android application backed by Firebase (Firestore + Auth) that functions as a compact CRM for tracking enquiries and disciplined follow-ups. Core features: • Enquiry form with dependent dropdown logic (e.g., category → model) • Conditional fields (exchange toggle reveals model & value) • Expected purchase date and next follow-up date logic • Status workflow: Interested, Follow-up Needed, Purchased, Competition, Not Interested • Next follow-up date mandatory for Interested and Follow-up Needed • Priority tag (Hot/Casual) • Auto timestamp, source, and owner tracking All enquiries stored in Cloud Firestore. Follow-up dashboard must support filters: • Today • Overdue • Upcoming • Custom date range...

    €231 Average bid
    €231 Ortalama Teklif
    27 teklifler

    I need a clean, well-structured Python module that connects directly to the Home Assistant API, handles authentication, and exposes simple functions for reading and updating entity states, firing events, and subscribing to real-time changes. Everything should be wrapped in reusable classes (ideally async-friendly) so I can drop the code into an existing project without major refactoring. While Home Assistant is the immediate focus, I also keep Google API and Gorq API integrations on the roadmap, so designing the code in a way that lets me add further REST endpoints later would be a bonus. Deliverables • Fully commented Python code (Python 3.10+) that authenticates and performs the core CRUD operations against the Home Assistant API. • A short demo script (CLI or Jupyter not...

    €78 Average bid
    €78 Ortalama Teklif
    20 teklifler

    I’m rolling out a Python-based platform that keeps an eye on city roads in real time. The first goal is clear: monitor live video from roadside traffic cameras, spot congestion, accidents or blockages within seconds, and push actionable alerts through a cloud-hosted pipeline. Later phases will weave in IoT sensors, GPS data and public-transport schedules, but for now cameras take centre stage and all processing happens in the cloud. Here’s what I need from you: • A complete stream-to-insight workflow: camera feed ingestion → cloud message bus → analytics micro-service. • Computer-vision models (OpenCV, YOLO, TensorFlow—your call) that flag incidents with >90 % precision/recall on my test clips. • A REST API that surfaces live traffic stat...

    €35710 Average bid
    €35710 Ortalama Teklif
    19 teklifler

    I’m building a mobile-only app that needs a real-time text chat backend dedicated to one-on-one conversations. The goal is a lightweight, low-latency server that can authenticate users, deliver messages instantly, store chat history, and scale as the user base grows—all without the overhead of group or public room logic. I’m open to proven stacks such as Node.js with WebSocket/, Go with gRPC, or an equivalent solution that plays nicely with iOS and Android clients. End-to-end encryption, push-notification hooks (FCM / APNs), and a RESTful or GraphQL API for ancillary data are highly desirable. Deliverables • Production-ready server code with clear setup instructions • Secure user authentication and encrypted message transport • Message persistence (Mo...

    €12 / hr Average bid
    €12 / hr Ortalama Teklif
    30 teklifler

    STATEMENT OF WORK (SOW) For Development of CISSP Educational Application This Statement of Work (“SOW”) is entered into on [Date], by and between: Client: __________________________ Address: ________________________ AND Service Provider (Freelancer): __________________________ Address: ________________________ Together referred to as the “Parties”. 1. Purpose The purpose of this SOW is to define the scope, deliverables, milestones, and responsibilities for the development of a CISSP Exam Preparation Educational Application, similar in functionality to Sybex and LearnZapp, deployable on Web, Android, and iOS platforms. 2. Scope of Work 2.1 Learner Application The Service Provider shall develop a learner-facing application with the following features: ...

    €149 Average bid
    €149 Ortalama Teklif
    10 teklifler

    Project Title IP Microphone Control System with Professional Broadcast UX (Prototype) Project Description We are looking for an experienced full-stack developer to build a technical prototype of an IP microphone control system with a professional broadcast-style user interface, inspired by tools such as RME TotalMix or high-end broadcast control panels. This is not a simple web app. It is a real-time control interface designed for professional audio and broadcast environments. Scope of Work Core objectives: Develop a software control interface for IP microphones Control parameters such as: Gain Mute / On-Off Status monitoring Interface must be: Clean Intuitive Optimised for professional operators System overview: IP microphones with: Separate IP control interface Audio...

    €1106 Average bid
    €1106 Ortalama Teklif
    107 teklifler

    I already have two complete app concepts: every screen, interaction and asset is designed, documented and ready to hand over. What I need now is the engineering muscle to turn those polished Figma files into production-ready Flutter applications that run smoothly on both iOS and Android. Both apps share a common backend. The REST endpoints, data models and authentication flow are all mapped out, so your focus will be wiring the UI to those services, managing state cleanly and ensuring offline resilience where needed. I expect pixel-perfect implementation of the provided designs, faithful reproduction of the planned user journeys and thoughtful handling of edge cases across devices. Deliverables • Full Flutter codebase for the two apps, structured for reuse of shared components &...

    €472 Average bid
    €472 Ortalama Teklif
    148 teklifler

    I’m looking for experienced engineers who can step into an active code-base built with React on the frontend and a Node.js backend, keep everything running smoothly, and leave the code healthier than you found it. Most of the work revolves around maintaining the existing platform—troubleshooting production issues, refactoring brittle components, tightening test coverage, and slipping in incremental feature requests without disrupting current users. What you’ll actually tackle day-to-day depends on your strength: • Frontend specialists will focus on React component updates, state management fixes, accessibility tweaks, and performance profiling. • Backend specialists will handle Node.js services, REST/GraphQL endpoints, database queries, and deployment script...

    €122 Average bid
    €122 Ortalama Teklif
    128 teklifler

    I need help finishing a React-based e-commerce web application within the next seven days. The design files and API documentation are ready; what’s left is turning them into a polished, functional front-end. Here’s the scope you’ll tackle during the one-week sprint: • Wire the React components to the existing REST endpoints • Implement routing and state management so pages load quickly and data stays in sync • Hook up the product listing and search views, the cart flow, checkout, and basic user sign-in/out • Apply the provided styles and ensure the layout remains responsive down to mobile screens • Hand over clean, well-commented code in a Git repo as the final deliverable I’m looking for someone comfortable with React Router, Con...

    €214 Average bid
    €214 Ortalama Teklif
    74 teklifler

    I already run a PAN-card portal and have obtained full documentation plus a live API key for the official Application API. What I now need is clean, well-tested code that plugs this API into my existing workflow so users can: • submit brand-new PAN applications • update records they have already started • pull back the latest application details in real time The API is REST/JSON and secured only by an API key, so no OAuth dance is required—just proper header handling and secure storage of the key on the server. I will provide the key, the docs, and access to a staging instance of the portal. Please wire the endpoints, map all responses to our current UI, build solid error/timeout handling, and give me a short read-me so future devs can follow the flow. Everyth...

    €50 Average bid
    €50 Ortalama Teklif
    20 teklifler

    I want to streamline two pillars of my customer journey through the WhatsApp Business API: end-to-end order management and secure phone verification. On the order side, the flow should cover placement, tracking, and final confirmation without requiring any manual intervention from my team. Customers need to see real-time updates, and the system must write each step back to my existing database (REST endpoint available; documentation ready). For phone verification, the system should automatically send a code, listen for the reply, validate it, and return the result to my app. No human action should be necessary once the user responds. Acceptance criteria • Single WhatsApp number handles both processes concurrently without collisions • Clear, commented code (Python, Node, or...

    €429 Average bid
    €429 Ortalama Teklif
    161 teklifler

    I need a full-stack developer to build a website in Node.js that cleanly presents three core areas—business listings, a blog section, and a product showcase—supported by a secure admin panel. The admin area must let me create, update, and archive content for each of those modules using a straightforward email-and-password login flow. Visual direction is modern and minimalist: lots of white space, clear typography, subtle accents, and a layout that feels snappy on both desktop and mobile. I’m happy for you to pick the most suitable Node.js framework (Express, Nest, Next, etc.) and database, as long as the code is modular and easy for another developer to pick up later on. Key deliverables: • Responsive public site with the three content sections wired to dynam...

    €257 Average bid
    €257 Ortalama Teklif
    102 teklifler

    I need a full-featured Windows desktop application that lets me trade on Delta Exchange without relying on the browser. The app must pull live market feeds through Delta’s REST and WebSocket APIs, show price charts and order-book depth in real time, and give me a clean workflow to place, modify, and cancel orders while tracking every open or filled position. Besides the trading views, I also want a section where I can review balances, funding history, and basic account details so I never have to leave the program to manage my profile. Acceptance criteria • Real-time data stream remains synced with the exchange at all times (sub-second latency). • Order actions confirm instantly and display status updates until filled or canceled. • Account information refre...

    €239 Average bid
    €239 Ortalama Teklif
    15 teklifler

    We are seeking a high-caliber, hands-on Engineer to lead the development of production-grade automation within the Windows ecosystem. This is a pure implementation role designed for a specialist who excels at translating complex functional logic into stable, scalable, and maintainable PowerShell scripts. You will be responsible for the "last mile" of development—ensuring that automation isn't just functional, but resilient enough for diverse enterprise environments. Key Responsibilities Production-Grade Development: Build and maintain robust PowerShell automation with a heavy emphasis on advanced error handling, structured logging, and modular execution flow. Windows Systems Integration: Deep-dive into Windows internals to manage and manipulate the Registry, File Sy...

    €10 / hr Average bid
    €10 / hr Ortalama Teklif
    15 teklifler
    REST API JMeter Script
    2 gün left
    Onaylı

    I want to work with a Jmeter expert freelancer remotely for few hours this weekend. Im beginer to intermediate level with jmeter. I need a reusable JMX file that will let me stress-test our REST API. The flow is straightforward: first, the script must obtain an OAuth 2.0 access token and keep it available for every subsequent sampler; next, it should hit the file-upload endpoint and push a sample CSV using multipart/form-data. Please capture all correlation values (token, upload IDs, etc.) with regular expressions or JSON extractors so the run can scale with multiple virtual users. The test plan has to be cleanly organised with clear naming, user-defined variables for host, credentials, and file path, and a separate thread group ready for ramp-up tuning. Deliverables • A JMX f...

    €21 Average bid
    €21 Ortalama Teklif
    27 teklifler

    I need a production-ready SaaS platform that lets different client accounts spin up their own AI voice agents in Malayalam, English and Hindi. The agents will answer inbound calls and place outbound ones for customer support first, but they must also be able to capture leads, run outreach campaigns and close basic sales when flows allow. Voice connectivity must be plug-and-play with TeleCMI, Twilio, Exotel or any comparable cloud telephony number. I expect full IVR support, dynamic call routing, call recording and the ability to fall back to a live agent when confidence drops. Key components and expectations • Multi-tenant architecture with role-based access so each tenant only sees its own data. • NLU, ASR and TTS tuned for the three target languages; switching between the...

    €625 Average bid
    €625 Ortalama Teklif
    23 teklifler

    I need a solid backend that lets several independent restaurants run from the same cloud platform while keeping a local MySQL database at each venue. The stack is already set: Node.js on the server side, Angular for the web console, and standard SQL. Core features I must see working: order management that mirrors every ticket and status update in real time, a secure user-authentication layer (roles for cashiers, kitchen, managers, etc.), and inventory tracking that updates stock counts the moment an item is sold or a delivery is recorded. Each restaurant keeps operating even if its connection blips, so a lightweight web service will sit on the local machine, watch the MySQL tables, and push changes to the cloud API the instant they happen; the cloud then replies with any new data to ...

    €1857 Average bid
    €1857 Ortalama Teklif
    324 teklifler

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