Umar Rehmani

I’m a backend-focused Senior Software Engineer with 6+ years of experience designing and building scalable Node.js microservices, REST APIs, and large-scale platforms. I bring a strong focus on performance, reliability, and maintainability, especially when modernizing legacy systems.

In my recent roles, I’ve led high-scale MERN applications and reliability improvements across production systems. At Cura Label Technologies, I supported growth from 10k to 500k+ active users, reduced server response times by 55% using MongoDB indexing and Redis caching, and accelerated deployment cycles by 40% through streamlined CI/CD while modernizing monoliths into modular microservices.

Previously at HireGPT.Co, I scaled a full-stack MERN platform from 15K to 600K+ active users and improved API response times by 50%+ by redesigning database queries and adding Redis caching layers. I also migrated a tightly coupled legacy system into independently deployable microservices, cutting release cycles by 40%.

I’ve also delivered end-to-end product work using MongoDB, Express.js, React.js, and Node.js, including RESTful backend services and authentication with JWT and role-based access control. Beyond core services, I’ve built real-time and event-driven architectures (Node.js, Redis, RabbitMQ), multi-tenant platforms, and production AI integrations using OpenAI, Gemini, and Claude.