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Senior Full Stack Engineer and technical lead with 6+ years of experience architecting, building, and scaling production web applications across the MERN stack and modern cloud infrastructure. Proven track record supporting high availability, low latency performance, and reliability at scale. Deep expertise in Node.js, Express.js, React/Next.js, TypeScript, MongoDB, PostgreSQL, Redis, microservices, and production AI integrations (OpenAI, Gemini, Claude). Focused on performance optimization, maintainability, scalability, and shipping dependable real-time and event-driven systems.…Senior Full Stack Engineer and technical lead with 6+ years of experience architecting, building, and scaling production web applications across the MERN stack and modern cloud infrastructure. Proven track record supporting high availability, low latency performance, and reliability at scale. Deep expertise in Node.js, Express.js, React/Next.js, TypeScript, MongoDB, PostgreSQL, Redis, microservices, and production AI integrations (OpenAI, Gemini, Claude). Focused on performance optimization, maintainability, scalability, and shipping dependable real-time and event-driven systems.

Umar Rehmani

Full Stack Developer, Software Engineer, Web Developer, +4

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Senior Full Stack Engineer and technical lead with 6+ years of experience architecting, building, and scaling production web applications across the MERN stack and modern cloud infrastructure. Proven track record supporting high availability, low latency performance, and reliability at scale. Deep expertise in Node.js, Express.js, React/Next.js, TypeScript, MongoDB, PostgreSQL, Redis, microservices, and production AI integrations (OpenAI, Gemini, Claude). Focused on performance optimization, maintainability, scalability, and shipping dependable real-time and event-driven systems.…Senior Full Stack Engineer and technical lead with 6+ years of experience architecting, building, and scaling production web applications across the MERN stack and modern cloud infrastructure. Proven track record supporting high availability, low latency performance, and reliability at scale. Deep expertise in Node.js, Express.js, React/Next.js, TypeScript, MongoDB, PostgreSQL, Redis, microservices, and production AI integrations (OpenAI, Gemini, Claude). Focused on performance optimization, maintainability, scalability, and shipping dependable real-time and event-driven systems.

Available to hire

Senior Full Stack Engineer and technical lead with 6+ years of experience architecting, building, and scaling production web applications across the MERN stack and modern cloud infrastructure. Proven track record supporting high availability, low latency performance, and reliability at scale.

Deep expertise in Node.js, Express.js, React/Next.js, TypeScript, MongoDB, PostgreSQL, Redis, microservices, and production AI integrations (OpenAI, Gemini, Claude). Focused on performance optimization, maintainability, scalability, and shipping dependable real-time and event-driven systems.

Skills

Experience Level

Expert

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Intermediate

Intermediate

Language

English

Advanced

Work Experience

Lead Full Stack Engineer at CuraLabel Technologies

July 1, 2025 - Present

Led end-to-end delivery and ongoing maintenance of high-scale MERN stack applications for multiple enterprise clients, driving user growth from 10K to 500K+ active users while preserving high availability, data integrity, and consistent platform reliability across production environments. Improved platform performance by designing and implementing MongoDB indexing strategies and Redis caching layers, reducing average server response times by 55% and significantly improving user experience under peak load. Partnered with engineering, product, and QA teams to modernize legacy monoliths into modular, independently deployable microservices—accelerating deployment cycles by 40% and reducing production incident rates. Mentored mid-level and junior engineers on scalable backend design, code review standards, and performance profiling. Owned technical architecture decisions and roadmap planning for multi-tenant systems, translating complex business requirements into reliable, production-read

Senior Software Engineer (Full Stack) at HireGPT.com

March 1, 2024 - July 1, 2025

Engineered and scaled a full-stack MERN platform from 15K to 600K+ active users, ensuring consistent platform reliability, high availability, and a seamless user experience during rapid sustained growth. Improved application performance by redesigning inefficient database queries, implementing MongoDB aggregation pipelines, and integrating Redis-based caching layers—reducing API response times by more than 50%. Directed modernization of a tightly coupled legacy system into independently deployable microservices, streamlining CI/CD workflows and simplifying release management to accelerate overall release cycles by 40%. Collaborated with product, design, and data teams to define technical requirements for AI-powered hiring features, delivering new functionality on schedule without compromising platform stability or performance.

Mid-Senior Software Engineer at Atlassian

January 1, 2022 - February 1, 2024

Developed and maintained full-stack web applications using MongoDB, Express.js, React.js, and Node.js, consistently delivering reliable, well-tested features in a fast-paced agile environment. Built responsive, reusable, high-performance user interface components with React, improving frontend consistency and reducing development time for future feature releases across multiple product teams. Designed and implemented secure REST APIs and backend services using Node.js and Express.js, integrating MongoDB and optimizing complex queries to improve application performance and data retrieval speed. Implemented robust authentication and authorization flows using JWT and role-based access control, collaborating closely with product managers, designers, and QA teams to deliver new features and enhancements.

Software Engineer at Vention

February 1, 2020 - January 1, 2022

Developed core server-side logic using Node.js with strong focus on building secure, scalable, and maintainable backend systems capable of supporting growing product requirements and increasing user traffic. Scaled frontend architecture using Next.js and ShadCN UI in monorepos, improving code reuse, build performance, and consistency across multiple internal and client-facing applications. Integrated complex third-party services including Stripe, Twilio, and SendGrid to enhance payment processing, messaging, and transactional email capabilities, improving overall user retention. Worked closely with senior engineers and product stakeholders to translate business requirements into technical specifications, contributing to sprint planning, code reviews, and release readiness processes.