API stands for Application Programming Interface, and it is an layer of interface that allows programs to interact with each other. An experienced API developer can build complex interactions between applications, making them faster, more reliable, and accurate. Whether you need a second opinion on your existing application or you want to create an entirely new application for your business, an expert API Developer can do the job for you.

An API Developer's job does not stop at developing. They can also work on design and implementation testing, guide through the entire architect process from prototyping to implementation, create custom system integration solution based on the project requirements, and collaborate with other teams to develop systems that meet customer expectations.

When hiring an API Developer through Freelancer.com, rest assured that they are as competent as any hired onsite software engineer.

Here’s some projects our experts have worked on:

  • Building custom interfaces to move large amounts of data efficiently between applications
  • Working with Javascript to allow websites to access external information relating to weather conditions
  • Creating Grafana dashboards for quick and easy visualization of data points
  • Developing scripts to connect external APIs with more heavy-duty platforms like Microsoft Azure
  • Debugging mobile apps involving fishing
  • Integrating AI capabilities into online shops
  • Automating regression tests so developers can work faster and more accurately

No matter what your business needs are in terms of API development, our expert freelancers are ready to take on the challenge and provide support whenever you need it. With expertise in debugging applications and web development, you're guaranteed to find the right developer for your project! So why wait? Post your project today at Freelancers.com and reap the benefits of working with an expert API Developer now!

Müşterilerimiz, API Developers freelancerlarımızı 181,114 değerlendirme içinden 5 üzerinden 4.87 ile derecelendirdi.
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    I am working on a voiceflow chatbot for which is have used the stackai and zapier .I need assistance in migrating that workflow from stackai to flowise and from zapier to n8n.

    €43 (Avg Bid)
    €43 Ortalama Teklif
    1 teklifler

    I need a mobile APP made with react native that will be sending a message by the user to an existing api and will return a modified text. The api is ready. The user should be able to login via facebook and google. The admin user should be have a web based dashboard in order just to enable or disable some users. The complete UI will be given on Figma and detailed documentation. The db should be Azure SQL Database or Cosmos DB The Authentication method can be Use Azure Active Directory B2C (Azure AD B2C) or other method If you can only implement that using mongodb or firebase also please place an offer

    €388 (Avg Bid)
    €388 Ortalama Teklif
    43 teklifler

    I am working on a voiceflow chatbot for which is have used the stackai and zapier .I need assistance in migrating that workflow from stackai to flowise and from zapier to n8n.

    €66 (Avg Bid)
    €66 Ortalama Teklif
    2 teklifler

    As a business looking to improve the performance of my application, I am now seeking to integrate the Pushr CDN for laravel. While I am not currently using a CDN, I am expecting less than 10k users on my application, with no definitive region or countries from which the majority of the users originate. As a result, I am looking for someone to assist in integrating Pushr CDN with my laravel application for improved performance. and to upload the images and videos from the application to the CDN.

    €146 (Avg Bid)
    €146 Ortalama Teklif
    46 teklifler

    Medial Journal Research Project 1. The system should allow a researchers to register and then to let them to select their interested topics ex: • Cancer research papers. • Covid-19. • Heart dieses. • Pharmacology • Toxicology • Insulin resistance. • AIDS/HIV • Mental diseases • Latest innovations in medical instruments and so on…… 2. The system admin has the ability to register users on behalf of them via their emails like (VIP users and Ministers). 3. The system and using the given API should crawl local (in Oman) and online papers and reports available in different resources like : • Google directories (International research). • GCC research centers and research resources (International research) • Any other...

    €518 (Avg Bid)
    €518 Ortalama Teklif
    40 teklifler

    I have subscription with fast account and also woocomerce website, and i want accounting software will be sync my all order and customer detail via API. accounting software share the api keys with us. and provide developer section. link is below

    €41 (Avg Bid)
    €41 Ortalama Teklif
    8 teklifler

    Hola, Busco quien pueda integrar etpay en mi codigo laravel de eventmie esta realizado en laravel 8. link de api:

    €43 (Avg Bid)
    €43 Ortalama Teklif
    5 teklifler
    Web3 Auth & Messenger 5 gün left
    ONAYLI

    Looking for blockchain expert who can create a messenger with web3 auth and blockchain messaging.

    €15 (Avg Bid)
    €15 Ortalama Teklif
    10 teklifler

    Hello, I will try to be as specific as possible so that you do not ask me the same thing that I already mentioned here, I am looking for a programmer with experience in API, I have an online store in Woocomerce which I want to connect to an external API of my recharge provider, I have created custom fields where you select country, provider, mobile number and amount, said data must be sent to my recharge provider so that he can automatically recharge, Do not worry about the payment method, since it will be using the balance of the Woocomerce wallet, so the order will always be made as completed. In summary, it is to send the data that the client has selected to my provider's API and it will then carry out the recharge and deduct the balance from my provider's panel. I am looki...

    €38 (Avg Bid)
    €38 Ortalama Teklif
    24 teklifler

    The project can be finished by delivering 2 desktop app for 2 functionalities or if its easier 1 app for each of the functionalities. Attachment has all the details needed. - The app should be able to handle HTTP and also selection of an USB Security token and POST requests for seamless communication. - The desktop app needs to be completed within 1 week. - Ideal skills and experience for this job include expertise in desktop app development for Windows, proficiency in communication protocols, and experience in handling HTTP and POST requests.

    €150 (Avg Bid)
    €150 Ortalama Teklif
    14 teklifler

    PaidMembershipsPro/Gravity Forms/Stripe Integration Project We are looking for a skilled developer to integrate PaidMembershipsPro, Gravity Forms, and Stripe. Functionality to integrate includes: Seat and Sponsored memberships configured in PMP for access to different forms to submit There is a cost per form submission - i.e. - $50/mo + $2 per submission Gravity Forms has the Stripe and Webhook Plugins installed Need to be able to charge a member the seat fee plus total of submissions for the previous month and have everything tracked/synced. The integration needs to be completed within two weeks. Would also like to possibly explore using Chargebee for seat and usage management. Ideal Skills and Experience: - Proficiency in PaidMembershipsPro, Gravity Forms, Stripe, and Chargebe...

    €502 (Avg Bid)
    Gizlilik Anlaşması
    €502 Ortalama Teklif
    17 teklifler
    mern``needed`` 5 gün left
    ONAYLI

    BUDGET > $120 / DEADLINE > 5-7 DAYS IF YOU DO NOT AGREE WITH MY BUDGET & DEADLINE, PLEASE DO NOT BID. AND FOR LANGUAGE BARRIER, PLEASE DO NOT BID IF YOU'RE FROM ANY SOVIET/BALKAN COUNTRY!!! Hi there, I need a MERN developer, who can build a business phone app using the VoxImplant [] Platform APIs & SDKs. The app will have a simple dashboard, where each app user, who is a site owner, can: 1- create an account ~ we will use NextAuth; 2- subscribe to a monthly payment plan ~ we will use Stripe ~ 85% COMPLETED; 3- buy a mobile number ~ we will use VoxImplant Platform APIs & SDKs; 4- configure the number to receive/make calls & send/receive texts ~ we will use VoxImplant; 5- track number activities i.e. total calls, made calls, received calls, etc.; * I am looki...

    €109 (Avg Bid)
    €109 Ortalama Teklif
    8 teklifler

    Hello, Here is website dbflaot what i want to do is that make something bot or program which fetch all newly data at once . its look like hard but easy i think its need to save some data . i will award since i will check that everything done in my pc

    €444 (Avg Bid)
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    25 teklifler
    ETL project using airbyte 4 gün left
    ONAYLI

    Hi! I’m in need of a skilled freelancer who is reliable and effective. I want to create an interface that likely react because that goes fast and then I want to integrate Airbyte to let my customers be able to export data to big query. The initial project is for 2 sources (Facebook/Instagram organic) and 1 destination big query. This is a urgent project with short timeline reckon about 10-15h work. added a picture of process

    €151 (Avg Bid)
    €151 Ortalama Teklif
    27 teklifler

    I am looking to convert a Telegram Crypto Trading Bot built with Python into a fully functional web application. To do this, I will be using and Typescript for the development of the web application. Additionally, I would like to add real-time market data updates as an additional feature so that users can easily view up-to-date information about various markets on the web application. The project scope also involves enhancing the existing trading strategies, as well as providing user authentication and account management.

    €17 - €143
    €17 - €143
    0 teklifler

    Need to fix this part or add a function. When I send one user's data the API works { "EMAIL": "", "FIRST_NAME": "Subscriber1 Fname", "LAST_NAME": "Subscriber1 Lname" } [ { "EMAIL": "", "FIRST_NAME": "Subscriber1 Fname", "LAST_NAME": "Subscriber1 Lname" }, { "EMAIL": "", "FIRST_NAME": "Subscriber2 Fname", "LAST_NAME": "Subscriber2 Lname" } ] But when I send several I get a response 403 { "EMAIL": [ "The Email is required" ] }

    €21 (Avg Bid)
    €21 Ortalama Teklif
    19 teklifler
    mern``needed 4 gün left
    ONAYLI

    NO PLACEHOLDER BIDS! NO PLACEHOLDER BIDS!! NO PLACEHOLDER BIDS!!! AND FOR LANGUAGE BARRIER, PLEASE DO NOT BID IF YOU'RE FROM ANY SOVIET/BALKAN COUNTRY!!! Hi there, I need a MERN developer, who can build a business phone app using the VoxImplant [] Platform APIs & SDKs. The app will have a simple dashboard, where each app user, who is a site owner, can: 1- create an account ~ we will use NextAuth; 2- subscribe to a monthly payment plan ~ we will use Stripe ~ 85% COMPLETED; 3- buy a mobile number ~ we will use VoxImplant Platform APIs & SDKs; 4- configure the number to receive/make calls & send/receive texts ~ we will use VoxImplant; 5- track number activities i.e. total calls, made calls, received calls, etc.; * I am looking for a full-time freelancer, who can complete ...

    €172 (Avg Bid)
    €172 Ortalama Teklif
    13 teklifler

    I am looking for a skilled developer who can create an APEX application for me. The main goal of this project is to accept CSV files as input and store the data in tables in an Oracle Database. Requirements: - Develop an APEX application that can handle CSV files as input - Use procedures to convert the data from the tables into the desired format - Create an API integration that allows users to upload data for time entry Ideal Skills and Experience: - Strong knowledge and experience with APEX development - Proficiency in working with Oracle Databases and SQL - Familiarity with CSV file handling and data conversion - Experience in creating API integrations Please note that the expected timeframe for completing the project and the desired format for the data conversion were not provided...

    €38 (Avg Bid)
    €38 Ortalama Teklif
    5 teklifler
    WB Data MVC 3 gün left
    ONAYLI

    Already awarded to someone else. Thanks

    €4 / hr (Avg Bid)
    €4 / hr Ortalama Teklif
    3 teklifler

    I'm looking for a Senior WP Plugins + watchnet API Engineer. I have a WordPress site. This site sells subscriptions to a shooting range. Watchnet is used as a security system at the shooting range. The purpose of this project is to develop a plugin that takes data from the watchnet database and combines it with the wordpress database. I will wait for your bid.

    €166 (Avg Bid)
    €166 Ortalama Teklif
    34 teklifler

    I am looking for a Mirakl Marketplace expert and someone who has had experience also with Omnivore Australia marketplace API software who can assist me with optimizing my Shopify website to external marketplace on an as-needed basis. The main goal of the optimization is to enhance product listings, and I require assistance with this task whenever it is necessary. My Shopify site only has approx 100-120 products. Skills and Experience: - Must have expertise in Mirakl Marketplace. I am based in Australia - and this sync is linked to Bunnings . Omnivore is a software I may have to use soon to connect to Kogan and Catch. I currently use Catchfeeder marketplace software which flows product to Catch. Omnivore API helps is here: Mirakl help support shows the product updating instructions et...

    €9 / hr (Avg Bid)
    €9 / hr Ortalama Teklif
    25 teklifler

    Powerful scraping Python API for Linux - I am looking for a Python developer to create a powerful scraping API specifically for Linux. - The API should be able to scrape data from specific websites that I will provide. - I only need the data to be scraped and no further processing is required. - The scraped data should be stored in a database of my choice. - The ideal candidate should have strong experience in Python programming, particularly in web scraping. - Knowledge of Linux systems and database management is also required.

    €171 (Avg Bid)
    €171 Ortalama Teklif
    42 teklifler
    Python developer 3 gün left

    Hello, and thank you for taking the time to consider my project! I am looking for an intermediate Python Developer to complete some work that I have in the pipeline. The specific Python skills required for this project are API integration, and no specific framework or library is needed.

    €10 / hr (Avg Bid)
    €10 / hr Ortalama Teklif
    31 teklifler

    I am looking for a NetSuite technical resource with advanced SuiteScript development experience. The main focus of this project is NetSuite customization. Skills and Experience: - Advanced SuiteScript development skills - Strong knowledge of NetSuite administration - Experience in NetSuite customization - Workflows and Customisations - WMS and Scanning - pick, pack and ship - EDI and API's Timeline: - The work needs to be completed as soon as possible.

    €15 - €31 / hr
    Yerel Özellikli Acil Mühürlü Gizlilik Anlaşması
    €15 - €31 / hr
    11 teklifler

    I'm going to build a mobile application that allows my customers to exchange their betting currencies(1XBET, LINEBET, BETWINNER, PERFECT MONEY) from or to local or fiat currencies using my application with the help of MobCash API. So what am looking for is a MobCash API that allows me to send money from my account to a user using the API.

    €469 (Avg Bid)
    €469 Ortalama Teklif
    33 teklifler

    I'm looking to create code in Google AppsScript that uses OAuth to interact with the API for our door locks. At this stage, all I want it to do is use a list of user identifiers in Google Sheets to update those users' access codes and then export the new codes to the same Google Sheets file. The API documentation is here:

    €211 (Avg Bid)
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    31 teklifler

    I am looking for a developer with experience working with APIs to connect our vacation rental system (which is made in Laravel) to using the API. The ideal candidate will have the following skills and experience: - Experience working with APIs, specifically the API. - Ability to complete the integration within a 3-4 week timeline. - Knowledge and understanding of integrating availability and rates, content, photo and get reservation functionality. If you meet these requirements and have the necessary skills and experience, please submit your proposal.

    €1185 (Avg Bid)
    €1185 Ortalama Teklif
    116 teklifler
    Chatgpt API integration 2 gün left
    ONAYLI

    Need someone experience developer to integrate ChatGPT/OpenAI API and also to integrate Twitter API. Details are straights forward. and I will share details to the persons who worked on openAI API

    €310 (Avg Bid)
    €310 Ortalama Teklif
    24 teklifler

    El sistema funciona a través de un webhook a una Api no oficial de whatsapp. El trabajo consiste en adaptarlo para que funcione con la Api OFICIAL. Si necesitan más información, pueden consultar.

    €154 (Avg Bid)
    €154 Ortalama Teklif
    15 teklifler

    Copy-pasted bids will be rejected. We are working on a project where we have a printer(USB printer) and we want to make it wireless. So essentially we are looking to build a system that can be connected to the printer on the USB port which will do all the mods. We are open to suggestions. Operation: This system must show up as an air printer on phones and computers. the way it does for actual air printers. Once the user sends a print command to this air printer, the system must receive that and send that file to a server, AWS or anything else that can work for 1000 devices without an issue. Once the server receives the file, it must be able to make some changes to the file, mostly the pdf/image would be cropped and rescaled to a preset dimension. Once this is done, the server sends this c...

    €364 (Avg Bid)
    €364 Ortalama Teklif
    6 teklifler

    Нужен бот для сайта который будет мгновенно покупать заданные мной вещи. Обьяснение что и как. На сайт в 10:00, 11:00 и тд (каждый час дня с 00:00 до 24:00) поступают новые предметы с ботов, у каждого вида предмета есть своя страница, нужно моментально сканировать наличие вещей в 10:00, 11:00 и тд и моментально покупать их, т.е. эти действия должны производиться в течении нескольких секунд после того как предметы поступили на сайт. Важная часть это время покупки, т.к. буквально за секунд 5-10 предметы скупают другие пользователи. Так же нужна функция чтобы я самостоятельно мог добавлять и удалять тот или иной предмет из списков бота. Все остальное в лс

    €202 (Avg Bid)
    €202 Ortalama Teklif
    3 teklifler

    I am looking for a skilled Flutter developer to create a social wishlist site. The site should allow users to create wishlists and share them with others. Users should also be able to follow other users' wishlists. Design/Scope of project/Functionality that must be supported: Timeline: The project should be completed within 1-2 months. Please use the sigma file to estimate effort/pricing. The SRS document might contain fewer features than shown in the FIGMA file. Ideal skills and experience: - Experience with Flutter development - Proficiency in creating social networking sites, API integrations, and payment platforms. - Strong communication skills to ensure timely completion of the project

    €2179 (Avg Bid)
    €2179 Ortalama Teklif
    190 teklifler

    We are seeking a Freelance API Integration Programmer with experience in integrating APIs to integrate the API of a website. Fluent English communication skills are essential. Job Description: Are you a skilled programmer with a knack for integrating APIs seamlessly? If you have experience in API integration and are ready to take on an exciting project, we want to hear from you!

    €171 (Avg Bid)
    €171 Ortalama Teklif
    52 teklifler

    Develop a web application using JavaScript or an appropriate technology stack. This application must possess the ability to process both voice input and output. To accomplish this, integrate both the Google Text-to-Speech and Speech-to-Text APIs. The application should support input and output in text and voice formats for both the Russian and English languages. Additionally, incorporate the ChatGPT API as a language model chatbot. Within the application's admin panel, there should be a setup feature that allows administrators to create tasks, roleplays, and instructional models, among other functionalities. It should be similar to this But its own system application webbrowseer and then we will ad prompts to it and make diffrent Tasks lessons to users. So admin panel site and fr...

    €624 (Avg Bid)
    €624 Ortalama Teklif
    66 teklifler

    I am looking for a skilled wordpress developer who can integrate Intact Xline software with Woocommerce plugin with API to manage inventory, update inventory and rest of the required things.

    €100 (Avg Bid)
    €100 Ortalama Teklif
    19 teklifler

    Please indicate if you can carry out the request. I want to be in control of the API number, and not rely connecting via a Business Service Partner. (BSP)

    €147 (Avg Bid)
    €147 Ortalama Teklif
    14 teklifler

    I am looking for an experienced programmer to help me improve and scale a python bot. Specifically, I need assistance with speed optimization and the implementation of error handling and debugging features. Additionally, I am seeking additional functionality to the overall project. My current scale is small, doing less than 1000 tasks per day, although I wish to significantly increase this to more than 10,000 tasks per day after the improvements have been made. If you are confident in your abilities and can help me reach this goal, then I would be excited to hear from you. It's a selenium bot and looking to connect to a few api. Looking to: - Threading - Headless - Improve speed - Reduce resources usage

    €189 (Avg Bid)
    €189 Ortalama Teklif
    21 teklifler

    We are looking for a full stack dev for ongoing work. Our goal is to provide this basic API project as a test to see how you do. This project will be for one aspect, google conversion tracking. Overview: ------------------------------------------------ When a conversion event occurs, we will post the event (purchase, addtocart, etc) to our new webhook system. The system will then lookup the correct conversion even and google account to post the data to. All responses, success/partial/failure will be recorded so we can fix the issues on on going basis. This will require a basic password protected web gui to view the tables, inbound webhooks, outbound api requests, responses, etc. Sample webhook (broken up to make easier to read) we might post to "" : ---------------------------...

    €514 (Avg Bid)
    €514 Ortalama Teklif
    40 teklifler

    I'm looking for an expert-level algo trading strategy developer for Qlymp Trade to help me with my personal project. This will involve developing and implementing a set of algorithms to achieve my desired objectives in trading securities. My target market for this project will be related to composites, including stocks, forex, and cryptocurrencies. This project requires an experienced freelancer who is well-versed in developing trading strategies based on data and who also possesses a good understanding of trading best practices. As such, I'm looking for someone who can provide exceptional solutions and help me meet my trading objectives.

    €184 (Avg Bid)
    €184 Ortalama Teklif
    7 teklifler

    Hi, I need a team who is having experience on integrating shipping to a website developed using core PHP Experience freelancer please

    €121 (Avg Bid)
    €121 Ortalama Teklif
    32 teklifler

    Explicit Filtering Phase project as discussed in chat for phrase detection and resultant redirect.

    €446 (Avg Bid)
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    29 teklifler

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