Senior / Lead Backend Engineer with 4+ years of experience building production-grade backend systems for fintech and enterprise products.
I specialize in Node.js, Express/Fastify, MongoDB, and AWS, with hands-on experience designing scalable APIs, multi-tenant architectures, and high-volume data processing systems.
- Backend: Node.js, Express.js, Fastify, REST APIs
- Databases & Caching: MongoDB, MySQL, Redis
- Architecture: Multi-tenant systems, Microservices (LLS), RBAC, Background Jobs, Worker Threads
- Validation & Security: Joi, KYC / KYB workflows, Access Control
- Cloud & DevOps: AWS (EC2, S3, ECS, ECR), CI/CD pipelines
- Monitoring & Tools: Prometheus, Grafana, Git, Postman
- Easy-e-Money – UK-based e-money platform
- Easy Cash Card – Business finance & card management
- Lava-e-Remit – International remittance system
Worked on secure transaction APIs, KYC/KYB onboarding, Redis-based caching, and performance-critical backend services.
- Designed a multi-tenant backend architecture with strict tenant isolation
- Implemented high-volume KPI & reward calculation engines
- Solved server memory exhaustion by offloading heavy workloads to Node.js worker threads
- Applied microservices principles to separate compute-heavy services from core APIs
- Optimized AWS EC2 infrastructure for stability and throughput
- Built a ticketing & client support backend system
- Admin & client authentication flows
- Approval workflows
- Admin-side Kanban board
- Role-based access control for multiple admin users
- Backend APIs for business card scanning & data extraction
- Integrated AI-based text extraction (OCR)
- Normalized unstructured text into structured contact templates
- Asynchronous processing for extraction workflows
- MongoDB schemas for scalable contact storage
- Integrated with React Native (Expo) mobile application
- Clean backend architecture
- Scalable and maintainable APIs
- Performance & memory optimization
- Real-world production problem solving
- Backend systems that scale with business growth
- LinkedIn: https://www.linkedin.com/in/hamzaramzan708
- GitHub: https://github.com/Hamza708
- Projects here reflect real production experience, not tutorials
- Strong focus on backend engineering, scalability, and system design
- Comfortable working with global remote teams