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Hi, I’m Muhammad Umer, a backend developer specializing in Node.js, Express, and NestJS. I have 3+ years of experience designing scalable RESTful APIs and real-time systems, with a strong focus on clean architecture, security, and performance. I’m proficient with MongoDB and PostgreSQL, and I’m comfortable collaborating with frontend teams and using Git for version control. I enjoy turning complex requirements into robust, maintainable backend services. Over the past years, I’ve built and integrated backend solutions across healthcare, AI-driven wellness, and e-commerce domains. I’ve contributed to medical workflow systems at Sybrid, created AI-powered services at Kodexolabs, and supported multi-vendor integrations at DotClick. I’m motivated by shipping high-quality solutions and continuously improving code quality and documentation.…Hi, I’m Muhammad Umer, a backend developer specializing in Node.js, Express, and NestJS. I have 3+ years of experience designing scalable RESTful APIs and real-time systems, with a strong focus on clean architecture, security, and performance. I’m proficient with MongoDB and PostgreSQL, and I’m comfortable collaborating with frontend teams and using Git for version control. I enjoy turning complex requirements into robust, maintainable backend services. Over the past years, I’ve built and integrated backend solutions across healthcare, AI-driven wellness, and e-commerce domains. I’ve contributed to medical workflow systems at Sybrid, created AI-powered services at Kodexolabs, and supported multi-vendor integrations at DotClick. I’m motivated by shipping high-quality solutions and continuously improving code quality and documentation.

Muhammad Umer

Back-End Developer, Web Developer, Full Stack Developer, +2

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Hi, I’m Muhammad Umer, a backend developer specializing in Node.js, Express, and NestJS. I have 3+ years of experience designing scalable RESTful APIs and real-time systems, with a strong focus on clean architecture, security, and performance. I’m proficient with MongoDB and PostgreSQL, and I’m comfortable collaborating with frontend teams and using Git for version control. I enjoy turning complex requirements into robust, maintainable backend services. Over the past years, I’ve built and integrated backend solutions across healthcare, AI-driven wellness, and e-commerce domains. I’ve contributed to medical workflow systems at Sybrid, created AI-powered services at Kodexolabs, and supported multi-vendor integrations at DotClick. I’m motivated by shipping high-quality solutions and continuously improving code quality and documentation.…Hi, I’m Muhammad Umer, a backend developer specializing in Node.js, Express, and NestJS. I have 3+ years of experience designing scalable RESTful APIs and real-time systems, with a strong focus on clean architecture, security, and performance. I’m proficient with MongoDB and PostgreSQL, and I’m comfortable collaborating with frontend teams and using Git for version control. I enjoy turning complex requirements into robust, maintainable backend services. Over the past years, I’ve built and integrated backend solutions across healthcare, AI-driven wellness, and e-commerce domains. I’ve contributed to medical workflow systems at Sybrid, created AI-powered services at Kodexolabs, and supported multi-vendor integrations at DotClick. I’m motivated by shipping high-quality solutions and continuously improving code quality and documentation.

Available to hire

Hi, I’m Muhammad Umer, a backend developer specializing in Node.js, Express, and NestJS. I have 3+ years of experience designing scalable RESTful APIs and real-time systems, with a strong focus on clean architecture, security, and performance. I’m proficient with MongoDB and PostgreSQL, and I’m comfortable collaborating with frontend teams and using Git for version control. I enjoy turning complex requirements into robust, maintainable backend services.

Over the past years, I’ve built and integrated backend solutions across healthcare, AI-driven wellness, and e-commerce domains. I’ve contributed to medical workflow systems at Sybrid, created AI-powered services at Kodexolabs, and supported multi-vendor integrations at DotClick. I’m motivated by shipping high-quality solutions and continuously improving code quality and documentation.

Skills

Experience Level

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Work Experience

Backend Developer at Sybrid Private Limited — A Lakson Group Company

July 1, 2025 - Present

Developed and maintained secure Node.js backend infrastructure for medical workflow management systems, ensuring patient data handling and 99.9% system uptime. Implemented features and enhancements based on project requirements, using REST API design principles and Node.js best practices. Troubleshooted and resolved bugs in the existing codebase, using debugging tools and techniques to identify and fix issues. Integrated frontend components to ensure seamless collaboration. Focused on code quality, maintainability, and API documentation using Swagger and OpenAPI.

Backend Developer at Kodexolabs

October 1, 2024 - July 1, 2025

Developed Nest.js backend APIs for an AI-driven nutrition and wellness platform, using REST API design principles and Node.js best practices. Built LangChain and RAG backend powering a personalized virtual trainer chatbot with real-time fitness recommendations and contextual conversations. Engineered a streaming text-rendering backend, achieving 98% response accuracy and using Node.js and MongoDB to store and process data. Integrated Apple HealthKit API for seamless health data synchronization, using Node.js and REST APIs to integrate with the HealthKit API. Optimized MongoDB aggregation pipelines and database indexing, reducing query execution time by 40% and improving overall system performance.

Backend Developer at DotClick LLC

August 1, 2023 - October 1, 2024

Built Refill Arena backend, handling API integrations with 5+ vendors and supporting 3,200 brands globally, using Node.js and REST APIs to integrate with vendor APIs. Designed and deployed cron jobs for data sync, reconciliation, and automated reporting, using Node.js and MongoDB to store and process data. Integrated Stripe subscriptions and webhooks for recurring payments and real-time notifications, using Node.js and REST APIs to integrate with Stripe. Implemented secure, multi-currency blockchain payment APIs with Coinbase Commerce and MetaMask, using Node.js and REST APIs to integrate with blockchain APIs. Developed comprehensive API documentation using Swagger/OpenAPI specifications, ensuring seamless frontend-backend collaboration and API documentation.

Backend Developer at Askari Technologies

December 1, 2022 - June 1, 2023

Built REST APIs with Node.js and Express.js for user management and e-commerce flows, using REST API design principles and Node.js best practices. Implemented JWT-based authentication and role-based access control (RBAC) with refresh token rotation, ensuring secure authentication and authorization. Integrated Stripe payments and subscription flows with backend webhooks, using Node.js and REST APIs to integrate with Stripe.