Mid-Level Backend Developer (API, Entegrasyon, SaaS Projesi)

@ZohaibRoy

⭐⭐⭐⭐⭐ Efficient Mid-Level Backend Developer for Your SaaS Project ❇️ Hi My Friend, I hope you're doing well. I've reviewed your project details and noticed you're looking for a mid-level backend developer. Look no further; Zohaib is here to help you! My team has successfully completed 50+ similar projects for backend development. I will create a robust backend architecture, integrate APIs, and ensure smooth data flow, all within your budget. ➡️ Why Me? I can easily do your backend development for the SaaS project as I have 5 years of experience in API development, database management, and integration. My expertise includes working with Node.js and Python frameworks, along with REST API design. Not only this, but I also have a strong grip on PostgreSQL, MySQL, and JWT authentication. ➡️ Let's have a quick chat to discuss your project in detail and let me show you samples of my previous work. I look forward to discussing this with you in our chat. ➡️ Skills & Experience: ✅ REST API Development ✅ JWT Authentication ✅ PostgreSQL ✅ MySQL ✅ Node.js ✅ FastAPI ✅ Django ✅ Shopify Integration ✅ WooCommerce Integration ✅ Cron Jobs ✅ Error Handling ✅ Docker Waiting for your response! Best Regards, Zohaib

@shivmirthyusl

Hi, As a mid-level backend developer with over 5 years of experience, specifically in REST API development, I have a deep understanding and knowledge of the technical requirements you have outlined for your SaaS project, especially when it comes to Shopify/WooCommerce integrations. I have spent quite some time working with JWT authentication and role-based authorization which aligns with your expectation from the ideal candidate for this role. What sets me apart is that I don't just code; I architect. Whether it's designing the backend architecture or developing an integration infrastructure, my solutions are always rooted in long-term scalability and efficiency. In addition to my proficiency in PostgreSQL, MySQL, different backend frameworks (such as NestJS), I can also confidently implement cron jobs and background jobs for improved system performance. Furthermore, I believe my SaaS and marketplace project experience will be highly beneficial to design your database schema, curate auth & role system, and delegate tasks to our existing team members. You can expect dedication, efficiency, and excellent turnaround time throughout the course of our project, ensuring we meet each milestone as scheduled. Let's discuss more about how we can take your project forward! Best, SNR

@kamran2012

Hello, I will work as a mid level backend developer on your API project in a clean and structured way. The focus will be on building reliable endpoints, clear data models, and stable integrations that support your application requirements. I can handle API development, database interaction, authentication, and business logic while keeping performance and maintainability in mind. I will follow backend best practices, write well organised code, and ensure proper validation and error handling. The system will be structured so new endpoints or features can be added later without major changes. We can review your API requirements together, define priorities, and plan clear milestones that fit the scope. I will also provide a short explanation of the API structure and key implementation details once completed. Looking forward to discussing further. Regards, Kamran.

@shrec

I am an experienced backend developer with strong expertise in API architecture, integrations, and SaaS systems. I can design the backend structure, implement secure authentication, build Shopify/WooCommerce integrations, and manage database schema and background jobs. I have hands-on experience with Node.js/NestJS (or Python), SQL databases, and scalable integration workflows. I’m ready to collaborate with your team and deliver a reliable, well-structured backend for your project.

@nikhilgarg96

With an extensive experience developing REST APIs and working with PostgreSQL and MySQL, along with my knowledge in Node.js (I have a preference for NestJS) and Python, I confidently tick all the important boxes of your requirements. Moreover, my portfolio includes successful integration of multiple third-party APIs like Shopify, Woo, payment gateways, and logistics services. Not only can I build the backend architecture and design the database schema for your project, but I can also establish an efficient authentication and role system as well as create a smooth integration infrastructure that you need. Beyond the basics, I'm well-versed with cron jobs, log management, error handling; skilled in using Redis/queue for task management and have experience working with webhooks and Docker. In addition to these must-have skills you mentioned, I have experience with SaaS projects and marketplaces. My familiarity with Docker and instances of remote work also make me a suitable choice since your project requires off-site collaboration. Thanks....

@corpmember29

I HAVE BUILT MULTI-PLATFORM SAAS BACKENDS WITH API INTEGRATIONS — READY TO STRUCTURE AND DEVELOP YOUR MARKETPLACE/SYNCHRONIZATION PLATFORM. Hello, I can take ownership of the backend architecture for your SaaS project, setting up a scalable, secure, and integration-ready system to handle product, stock, and price synchronization, as well as order and shipping flows. Core Features & Responsibilities • Design and implement REST APIs with JWT authentication and role-based access • Database schema design (PostgreSQL/MySQL) for products, orders, stock, and users • Integration with Shopify, WooCommerce, payment gateways, and shipping APIs • Background jobs / cron tasks for periodic syncs and processing • Logging, error handling, and monitoring • Task delegation to junior backend developer • Coordination with frontend team for API contracts Optional / Plus Features • Redis / job queues (BullMQ, Celery) • Webhooks for real-time updates • Docker-based deployment and environment management • SaaS or marketplace-specific optimizations User Roles • Admin: configure sync rules, monitor API health, manage users • End Users / Stores: sync products, prices, and orders • Backend Team: maintain integrations, process background jobs I can work remotely, provide weekly progress updates, and manage tasks for junior developers. Ready to start immediately and structure the backend for robust SaaS operations.

@Julian29

Merhaba, İhtiyaçlarınızı inceledim ve SaaS/pazar yeri projeniz için arka uç mimarisini oluşturabilirim; buna REST API geliştirme, rol tabanlı erişimle JWT kimlik doğrulaması, PostgreSQL/MySQL veritabanı tasarımı ve Shopify, WooCommerce, ödeme ve kargo API'leriyle entegrasyonlar dahildir. Node.js (NestJS) ve Python (FastAPI/Django) ile arka uç geliştirme alanında 10 yılı aşkın deneyime sahibim; çok kiracılı SaaS platformları, zamanlanmış/arka plan görevleri, günlük kaydı ve hata yönetimi konularında da deneyimliyim. Yaklaşımım şunları içermektedir: • Arka uç mimarisinin ve veritabanı şemasının tasarlanması ve uygulanması • Kimlik doğrulama, roller ve güvenli erişim kontrollerinin kurulması • Harici platformlar ve webhook'lar için entegrasyon altyapısının geliştirilmesi • Genç arka uç geliştiricilerine görev atama ve mentorluk yapma • Modüler, sürdürülebilir bir yapıya sahip, temiz ve belgelenmiş kodun sağlanması 2 YIL BOYUNCA ÜCRETSİZ SÜREKLİ DESTEK VE TAM KAYNAK KODUNU SAĞLAYACAĞIM. ÇEVİK METODOLOJİ İLE ÇALIŞACAĞIZ VE SİZE SIFIRDAN MAĞAZALARDA YAYINLAMAYA KADAR YARDIMCI OLACAĞIM. Hemen çalışmaya başlamaya, aşamalı kilometre taşları teslim etmeye ve zamanında ilerleme takibi için ön uç ekibiniz ve genç arka uç geliştiricinizle iş birliği yapmaya hazırım. Olumlu yanıtınızı sabırsızlıkla bekliyorum. Teşekkürler.

@samarhabib

Hello, I'm a full stack developer with 10+ years of experience, I can take full ownership of the backend architecture and integrations for your SaaS project. I have strong experience designing REST APIs, JWT-based auth/role systems, PostgreSQL schemas, and building integrations with Shopify, WooCommerce, payment providers, and shipping APIs. I work with both NestJS and FastAPI, implement cron/background jobs, webhooks, and logging/error-handling best practices. Why work with me? ★ Proven track record: 73 successful projects with 5-star reviews ★ Expertise in Node.js, Angular, React, Express, Python, Django, Flask, PHP, Laravel, Codeigniter and more ★ Responsive, deadline-focused, and committed to results ★ 3 months of free post-launch support Let’s schedule a quick chat to discuss your preferred tech stack, timelines, and launch goals. I’m confident I can bring your vision to life. Best regards, Samar H.

@caroldata

As a seasoned backend developer, I have a decade of experience in software development, and specifically, I've worked extensively with PostgreSQL and Redis which are among your preferred technologies for this project. My expertise includes developing REST APIs, implementing JWT authentication & role-based authorization, as well as handling 3rd party API integrations which is a key requirement for this position. I've also used Node.js, particularly NestJS framework, as well as Python's FastAPI and Django. In terms of projects similar to yours, I have worked on SaaS projects before and that experience will bring immense value to your team. Moreover, my proficiency in Docker indicates that I have a good grasp of managing software bundling and dependencies - a skill that is often demanded by projects with multiple integrations like yours. My communication skills will ensure clarity during any remote collaboration and I assure you of daily progress updates and 100% satisfaction guaranteed. Let me assist you in this visionary project!

@Alizakhani32

Hello there, I will be happy to help you as a mid-level backend developer for your SaaS project. I have experience building backend architectures, designing database schemas, setting up JWT authentication with role-based access, and integrating platforms like Shopify and WooCommerce. I also work with Node.js (including NestJS), MySQL/PostgreSQL, cron jobs, background jobs, and 3rd-party API integrations, which fully matches the requirements of your project. I suggest starting with a clear technical plan that covers the overall architecture, integration flow product, stock, price sync, order & shipping pipelines, and webhook handling. After that, I can set up the backend structure, build the API layers, create the auth system, and prepare the integration framework so your junior developer can follow clear tasks. I can also work smoothly with your frontend team and support ongoing weekly progress reviews. To better plan my approach, could you confirm which backend framework you prefer for this project NestJS or Python FastAPI/Django? Best regards, Aliza K.

@mahig47

Merhaba Proje ilanınızda belirtildiği gibi, ürün envanteri fiyat senkronizasyonu, Shopify/WooCommerce gibi platform entegrasyonları ve tam sipariş ve gönderim akışlarını kapsayan bir SaaS projesi için arka uç mimarisini oluşturacak orta seviye bir arka uç geliştiricisi arıyorsunuz. Amaç, API entegrasyonlarını, kimlik doğrulamasını ve arka plan süreçlerini sorunsuz bir şekilde ele alan güvenilir ve ölçeklenebilir bir arka uç sağlamaktır. Odak noktam, REST API'leri, rol tabanlı erişimle JWT kimlik doğrulaması, PostgreSQL/MySQL'de güvenli veri işleme ve üçüncü taraf hizmetlerle sorunsuz entegrasyon içeren sağlam bir arka uç sunmak olacaktır. Sistem, güvenilirlik ve sürdürülebilirliği sağlamak için arka plan işleri, günlük kaydı ve hata işleme içerecektir. Node.js/NestJS ve Python çerçeveleri (FastAPI/Django), API entegrasyonları, cron ve kuyruk tabanlı süreçler ve SaaS platform mimarisi konularında deneyime sahip bir arka uç geliştirme uzmanıyım. Odak noktam, güvenli, ölçeklenebilir ve gelecekteki özellik genişletmelerine hazır bir sistem oluşturmak olacaktır. Envanter, sipariş ve sevkiyat süreçleri için entegrasyon gereksinimlerini gözden geçirmek ve iş akışını tanımlamak üzere iletişime geçelim. Saygılarımla, Nikita Gupta

@prashjain92

Hello, I have carefully read your project description and I am genuinely interested in contributing to your backend focused SaaS integration platform. Your requirements around product stock and price synchronization, multi platform integrations, order and cargo flow, and a solid backend architecture are clear, and I am ready to build a dependable structure that supports your team and future growth. I understand how important clean API design, reliable authentication, smooth integration logic, and well organized database structure are for a project that will expand over time. Core features likely include API development, integration workflows, authentication system, database architecture, background jobs, and logging. With more than seven years of experience across backend development, API integrations, mobile and web applications, and full cycle architecture, I can deliver well structured code, clear documentation, and stable environments that support both your frontend and junior backend team smoothly. I enjoy collaborative work and I am enthusiastic about helping you deliver a scalable and maintainable system. Let us schedule a quick chat to align your vision and next steps. Best Regards, Prasham Jain

@jayprakashyadav

As an experienced web developer with over a decade of expertise, I'm confident in my ability to deliver exceptional results on your SaaS project. My skills in REST API development, 3rd party API integration, and background job logic align perfectly with your requirements. I specialize in backend development - having proficiency in platforms like Node.js (including NestJS) and Python (including FastAPI and Django). Most notably, I have a solid understanding of the efficient data management through PostgreSQL and MySQL. My experience doesn't end at just fulfilling technical criterion; but also extends to addressing modern challenges faced by different businesses. Furthermore, you can count on me for my sharp eye on logging and error management, which aids not only in smoother functioning but also in troubleshooting minor hitches as they occur. Notably, I've previously worked on SaaS projects similar to yours, making me well-versed with the responsibilities entailed in your project. My broad know-how enables me not just to set up backend architecture, design databases schemas or establish authentication systems, but also to effectively collaborate with other team members like your junior backend developer and frontend team. Combining all this together, you can trust my excellence in managing your project through keen weekly task tracking alongside consistent progress updates to ensure desired outcomes. Let's make your SaaS dream a reality together!

@ixorawebmob

Merhaba Bugra, Projeniz için hazır olduğumu belirtmek isterim. Mid-Level Backend Developer olarak, özellikle API geliştirme ve entegrasyon konularında kapsamlı deneyimimle projenizi başarıyla yönetebilirim. Shopify ve WooCommerce gibi platformlarla entegrasyon, veritabanı tasarımı ve backend mimarisi konusundaki yetkinliğim sayesinde, ihtiyaçlarınızı karşılayacak bir çözüm sunabilirim. ✅ 100'den fazla proje başarıyla tamamladım. Profilim: https://www.freelancer.in/u/ixorawebmob ✅ Şeffaflık ve Kalite Prensiplerimiz: 1) NDA / IP Anlaşması imzalamaya hazırım 2) Geliştirdiğimiz kaynak koduna %100 sahiplik hakkı sizde olacak 3) Tüm kaynak kodunun teslimi 4) Özellik genişletme kolaylığı için yüksek ölçeklenebilir mimari 5) 6 Ay ÜCRETSİZ bakım ve destek Projeyi aldığınızda hemen başlayabilirim. Gelin detayları konuşalım ve projenizi hayata geçirelim!

@sekai1116

Merhaba, ben Jiayin. ✅ Quality, speed, and reliability — every project, every time. ✅ SaaS projelerinde backend mimarisi, API geliştirme, entegrasyonlar ve çoklu platform senkronizasyonu konularında güçlü deneyime sahibim. Projenizde yer alan ürün–stok–fiyat senkronizasyonu, Shopify/WooCommerce entegrasyonları, sipariş ve kargo akışları gibi süreçler, daha önce birçok kez geliştirdiğim yapılara birebir uyuyor. ✔ Artı Değer Sağladığım Alanlar Redis + BullMQ / Celery ile queue altyapıları Webhook listener ve güvenlik doğrulama süreçleri Docker/Compose ile microservice-ready mimari kurma Daha önce geliştirdiğim SaaS & marketplace uygulamaları (çoklu mağaza + çoklu entegrasyonlu) ✔ Projedeki Rolüm Backend mimarisini sıfırdan kurmak Sağlam, genişleyebilir bir veritabanı şeması oluşturmak Yetkilendirme/rol sistemi kurmak Shopify/WooCommerce vb. entegrasyon altyapısını kurmak Junior backend geliştiriciyi yönlendirmek ve task’larını netleştirmek Frontend ekibiyle temiz API kontratları üzerinden çalışmak ✔ Çalışma Şeklim Remote, düzenli iletişim Haftalık task & progress raporları İster proje bazlı, ister aylık çalışma modeli uygun Başlangıç takvimini birlikte netleştirebiliriz Eğer isterseniz, proje detaylarını iletir iletmez mimari taslak + veri modeli + entegrasyon flow diagramı hazırlayarak hızlıca başlangıç sunabilirim. Projenizde değer katmayı çok isterim. Görüşmek üzere, Jiayin