Looking for a job

Md Abdur Razzak

@mdabdurrazzak

Message

I build reliable Node.js backends, SaaS platforms, APIs, and real-time systems.

Bangladesh

Message

What I'm looking for

I'm looking to build maintainable, reliable production systems, especially SaaS platforms, APIs, real-time workflows, payments, and AI/LLM integrations, with a strong focus on architecture and data integrity.

I'm building production SaaS and client applications at SparkTech Agency, where I deliver Node.js and TypeScript APIs for authentication, booking, admin workflows, billing, and real-time updates.

I replaced polling with Socket.io events to remove 200 unnecessary HTTP requests per active session and deliver booking updates in under 150ms. I also optimized MongoDB queries from roughly 650ms to 45ms and deployed a Linux VPS application with 99.6%+ uptime.

As the sole backend engineer on Manny Flower and across platforms including Vivaleve and a beauty booking marketplace, I design secure modular backends with RBAC, Stripe webhooks, Redis, BullMQ, RabbitMQ, PostgreSQL, MongoDB, and Socket.io.

Experience

Work history, roles, and key accomplishments

Current

Backend Developer (Node.js)

Current

SparkTech Agency

Jan 2025 - Present (1 year 8 months)

Architected and delivered REST API endpoints for authentication, booking, and admin workflows using Express.js and TypeScript. Implemented JWT and Google OAuth authentication, RBAC, Socket.io event-driven updates, and Stripe billing integration.