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Fiverr Pro
English
$
USD
I will develop and integrate rest apis with python fastapi or java spring boot
Manish Dinkar
About this gig
Need a reliable backend or an API integration done right? I'm a backend developer with 3+ years of experience building production REST APIs in Java (Spring Boot) and Python (FastAPI).
What I can do:
- New REST APIs with clean structure, validation and error handling
- Third-party integrations: Stripe, Razorpay, Twilio, SendGrid, Google and other APIs
- Authentication with JWT and OAuth2
- PostgreSQL or MySQL database design
- Swagger/Postman documentation and automated tests
- Docker setup and deployment
- Fixing and speeding up existing APIs
Real work in my portfolio:
- Clinic management backend: 88 automated tests, load test with 50 users, 0 errors, 63 ms median response
- Real estate portal API: search at 26.7 ms (95th percentile) with 100 concurrent users
Please message me with your requirements before ordering so I can confirm scope and timeline.
Get to know Manish Dinkar
Manish Dinkar
AI and Backend Developer, RAG Chatbots, Document AI, Python APIs
- FromIndia
- Member sinceSep 2023
Languages
English, Hindi
I'm an AI and backend developer with 3+ years of experience building production APIs in Java (Spring Boot) and Python (FastAPI).
What I build:
• AI chatbots with RAG that answer from your own documents, with sources and human handoff
• Document AI that turns invoices and PDFs into checked data for Excel, CSV or JSON
• REST APIs and integrations (Stripe, Razorpay, Twilio, OAuth, JWT)
• Computer vision apps with YOLO and OpenCV
You get clean, tested code and clear docs. See my portfolio for real, measured results, then message me with your idea.
My Portfolio
FAQ
What do I need to provide before starting the order?
You’ll need to share a brief about the API you want, project access (codebase or staging), API documentation (if any), and required credentials (safely). I’ll guide you through what’s needed.
Will I get the source code and documentation?
Yes, all my packages include clean, well-commented source code. You can also opt for Postman or Swagger documentation as a Gig Extra.
Can you integrate payment gateways like Stripe, Razorpay, or PayPal?
Absolutely! I can integrate popular payment gateways with full testing, sandbox setup, and security handling (e.g., webhooks, token auth).
Do you also deploy the API on a server or cloud?
Yes, I can deploy your backend to DigitalOcean, EC2, Render, or other servers. Please mention this upfront or check my Deployment Gig (if listed separately).
What if I’m not sure what plan to choose?
No worries! Just message me with your project idea or need, and I’ll suggest the best plan or create a custom offer tailored to you.
