Senior Backend Engineer
for Hire
Node.js & FastAPI · Django & Python · PostgreSQL · Microservices
I'm Ramesh Kumar Das — a Senior Backend Engineer with 6+ years of production experience designing, building, and scaling high-performance backend systems, distributed APIs, and microservices architectures. I specialize in Node.js, FastAPI, Django, and PostgreSQL, delivering backend systems that are secure, fast, and production-hardened. I have consistently delivered measurable results: 35% faster APIs, 30% better database performance, 25% lower server load, and 40% faster deployments across real production systems. If you need a backend engineer who can architect and own your entire server infrastructure — I'm the right hire.
Backend Engineering Stack
Production-proven technologies for high-performance, scalable backend systems
Backend Engineering Services
What I can design, build, and optimize for your engineering team
⚡ High-Performance REST API Development
Designing and building production-grade REST APIs with Node.js, FastAPI, and Django — optimized for low latency, high throughput, proper versioning, rate limiting, and comprehensive documentation.
🏗️ Microservices Architecture
Breaking monolithic systems into scalable, independently deployable microservices. Service discovery, inter-service communication, API gateways, event-driven messaging with Kafka, and Docker orchestration.
🗄️ Database Design & Optimization
PostgreSQL and MongoDB schema design, query optimization with proper indexing, connection pooling, Redis caching layers, and data migration strategies. Consistently achieving 25–30% query performance gains.
🔒 Backend Security Engineering
Implementing JWT and OAuth 2.0 auth flows, RBAC systems, CSRF protection, SQL injection prevention, API rate limiting, and secure session management following OWASP standards.
⏱️ Async & Background Processing
Celery task queues with Redis brokers, WebSocket real-time systems, async Python/Node.js programming, and event-driven architectures for handling concurrent workloads without blocking the main thread.
☁️ Backend Deployment & DevOps
Docker containerization, docker-compose orchestration, CI/CD pipelines with GitHub Actions, AWS deployment (EC2, S3, Lambda), Nginx reverse proxy configuration, and production monitoring with Sentry.
Work Experience
6+ years building production-grade backend systems for real businesses
WinstaAI Backend Infrastructure (Kuwait)
Designing and owning the entire backend architecture for a production AI SaaS platform with microservices, async task processing, and third-party API integrations.
- Architected FastAPI + Django microservices backend with async workflows, REST APIs, and event-driven task queues
- Built high-traffic API systems supporting real users with JWT auth, RBAC, rate limiting, and payment gateway integration (Stripe, PayPal)
- Designed PostgreSQL database schemas for complex relational data with optimized query performance
- Deployed services on AWS + Docker with automated CI/CD, Nginx reverse proxy, and Sentry monitoring
Dibbly AI & Paperport (India)
- Built scalable backend systems using Node.js, Express.js, FastAPI, and Django — improved API response time by 35%
- Implemented microservices architecture improving system scalability and modularity for large-scale production applications
- Designed and optimized PostgreSQL and MySQL schemas — reduced query execution time by 30% using indexing and query tuning
- Deployed with Docker and CI/CD pipelines — reduced deployment time by 40%
- Built real-time WebSocket systems with Redis — improved data delivery speed by 25%
- Developed async background processing with Celery and Redis task queues for heavy workloads
Khantailor eCommerce & PathHub Medical Platform (India)
- Developed and maintained REST APIs using Node.js, Express.js, and Django supporting multiple business modules
- Designed scalable database architectures (MySQL, PostgreSQL) — improved query performance by 25%
- Implemented JWT and OAuth 2.0 auth systems with secure session management for HIPAA-focused medical platform
- Optimized API latency by 20–30% through code refactoring, query optimization, and Redis caching
Frequently Asked Questions
Common questions from engineering managers and CTOs looking to hire backend engineers
Ready to Hire a Senior Backend Engineer?
Open to backend engineering roles, API development contracts, and system architecture consulting — remote worldwide