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$
USD
I will build scalable nodejs and nestjs backend
Munib Ul Hassan
About this gig
Are you building a SaaS product, startup backend, or internal tool and need production-grade Node.js APIs that actually scale?
I'm a Senior Backend Engineer with 6+ years building high-performance server-side systems using Node.js, NestJS, TypeScript, and AWS including a real-time fleet management platform handling 10,000+ daily API requests across the UAE and UK.
Most notable result: rebuilt a GPS telemetry ingestion pipeline from 3,000ms to under 30ms a 100x performance improvement through Redis pub/sub, in-memory caching, and async Node.js architecture.
WHAT I BUILD FOR YOU:
REST APIs and GraphQL APIs with NestJS or Express.js
Authentication systems: JWT, OAuth 2.0, RBAC, multi-tenant
Database integration: MongoDB (Atlas, aggregation pipelines, indexing) and PostgreSQL
Redis caching and pub/sub for high-performance systems
WebSocket and Socket.IO for real-time features
Microservices architecture with RabbitMQ message queuing
Docker containerization and CI/CD pipelines
AWS deployment: EC2, S3, Lambda, ElastiCache
Full Swagger/OpenAPI documentation
WHY ME:
I write clean, documented, production-ready code not demo code
I've worked with EU SaaS teams (Ireland) and unde
Get to know Munib Ul Hassan
Munib Ul Hassan
Senior Nodejs Backend Engineer Real Time IoT, GPS Telemetry Systems
- FromPakistan
- Member sinceMar 2019
- Avg. response time18 hours
Languages
English
I build backend systems for real-time data at scale — Node.js/NestJS APIs, IoT/GPS telemetry, and AWS infrastructure.
6+ years experience. Currently running backend for a fleet management platform serving UAE/UK clients — real-time vehicle tracking, automated reporting, incident alerting for thousands of vehicles.
Signature result: rebuilt a GPS pipeline from 3,000ms to 30ms latency (100x) using Redis pub/sub + async architecture — now live in production.
I ask the right questions upfront, deliver documented code, and communicate clearly.
My Portfolio
FAQ
What Node.js frameworks do you work with?
I primarily work with NestJS and Express.js, both with TypeScript. NestJS is my default recommendation for production APIs due to its modular architecture, built-in dependency injection, and enterprise-grade structure. Express.js is better for simpler, lightweight APIs. I'll recommend the right one
Which databases do you support?
I work with MongoDB (including Atlas, aggregation pipelines, and compound indexing), PostgreSQL (with advanced schema design and indexing strategies), and Redis for caching and pub/sub. I can also integrate with existing databases — just share your current schema and I'll work with it.
Will my API be production-ready or just a demo?
Every delivery is production-ready. That means proper error handling, structured logging (Winston), environment-based configuration, input validation (class-validator), rate limiting, and full Swagger/OpenAPI documentation. I don't deliver demo code that breaks under real load.
Do you write tests?
Unit and integration tests with Jest are included in the Standard and Premium packages. The Basic package includes manual testing via Postman collection. If you need 100% test coverage, select the Premium package or message me to add it as an extra.
Can you work with my existing codebase?
Yes. I regularly extend and refactor existing Node.js codebases. Share your repository before ordering and I'll review the architecture, identify any issues, and confirm the scope. No surprises after we start.
What if I need changes after delivery?
Each package includes a set number of revisions. A revision means changes to the delivered scope — not new features. If you need additional features after delivery, we can discuss a follow-on order. I respond to all post-delivery questions within 24 hours.
Do you sign NDAs?
Yes. I'm happy to sign a mutual NDA before starting work. Your code, business logic, and data remain fully confidential. Message me before ordering and I'll send a standard NDA for your review.
