Uman Mushtaq

I’m a Node.js / NestJS engineer with 4+ years building production-grade microservices across fintech, crypto, and SaaS. I specialize in scalable backend systems and event-driven architecture using RabbitMQ and Kafka.

In my freelance work, I delivered backend missions using Node.js, NestJS, and TypeScript, including NexusPay, an event-driven fintech platform built on 7 NestJS microservices. I apply CleanArchitecture and Domain-Driven Design, and I’ve implemented Saga-based distributed transactions, Redis caching, distributed locks, and refresh-token JWT authentication.

I’ve also built and maintained jobsScrapper, integrating GeminiAI for scoring and relevance matching across 20+ European job boards. I architect and manage fully Dockerized infrastructure with GitHubActions CI/CD pipelines, Supabase PostgreSQL, and Upstash Redis deployed on Render.

Previously at OptimusFox, I built and delivered 4 production microservices, integrating Stripe, PayPal, Auth0, Firebase, Twilio, and SendGrid. I redesigned PostgreSQL and MongoDB schemas to resolve data integrity failures, built CI/CD pipelines from scratch to reduce deployment effort by ~60%, and Dockerized services for consistent development and production releases.