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I will create secure and scalable apis with express, nestjs or fastify


About this gig
Are you looking for a reliable backend developer to build secure, scalable, and high-performance APIs for your web, mobile, or desktop application? You're in the right place!
With 5+ years of experience in backend development, I specialize in creating RESTful APIs and GraphQL queries/mutations that integrate seamlessly with your frontend.
What I Offer
- Custom REST API Development CRUD endpoints, pagination, filters, sorting
- GraphQL API Development schema design, queries, and mutations
- Framework Expertise Express.js, Fastify, NestJS
- Database Integration PostgreSQL, MySQL, MongoDB using Prisma or TypeORM
- Authentication & Authorization JWT, OAuth, session-based, role-based access
- API Documentation Swagger, OpenAPI, Postman, GraphQL Playground
- Testing & Debugging Ensuring your APIs are secure, stable, and error-free
- Scalable Architecture Proper repository & service layers for maintainability
Why Choose Me?
5+ Years of Experience built APIs for fintech, e-commerce, SaaS, and B2B platforms
Multi-Framework Expertise Express, Fastify, NestJS, GraphQL
Fast, Reliable & Transparent Communication
Get to know Abdulmoiz Ahmer
- FromPakistan
- Member sinceJul 2018
- Last delivery3 years
Languages
Urdu, English
FAQ
Q1. Do you build both REST and GraphQL APIs?
Yes I can build RESTful APIs as well as GraphQL servers with queries and mutations depending on your project needs.
Q2. Which frameworks do you use?
I specialize in Express.js, Fastify, and NestJS for backend development. I’ll recommend the best option based on your scalability, performance, and architectural needs.
Q3. Can you integrate my API with a database?
Absolutely! I can integrate PostgreSQL, MySQL, or MongoDB using Prisma, TypeORM, or Mongoose for seamless data handling.
Q4. Will my API be secure and optimized?
Yes. I follow industry best practices for security, performance, and scalability — including JWT/OAuth authentication, rate limiting, validation, and proper error handling.
Q5. Do you provide API documentation?
Definitely! I can deliver Swagger/OpenAPI docs, Postman collections, and GraphQL Playground so other developers can easily consume your APIs.
Q6. Can you also deploy the API to the cloud?
Yes! I can deploy your APIs on AWS, GCP, Heroku, or Vercel and set up CI/CD pipelines if needed.
Q7. What if I need more than 10 endpoints?
No problem! Just send me your requirements, and I’ll prepare a custom offer for your project.
Q8. Do you offer GraphQL subscriptions or real-time APIs?
Yes! If your project needs real-time features like live updates or chat, I can implement GraphQL subscriptions or WebSockets.
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3 reviews for this Gig
| (3) | ||
| (0) | ||
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| (0) | ||
| (0) |
Rating Breakdown
- Seller communication level
- Recommend to a friend
- Service as described
Sort By
F filipposk916
Repeat Client

Greece
Thank you🙏
Helpful?F filipposk916
Repeat Client

Greece
Thank you🙏
Helpful?F filipposk916
Repeat Client

Greece
Thank you🙏
A 
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