m
mohsindev01

Mohsin Javed

@mohsindev01

Software Engineer

Pakistan
English, Urdu, Hindi
About me
I'm Mohsin, a Software Engineer specializing in React, Next.js, Node.js, Express, TypeScript, PostgreSQL, and Docker. My work centers on two things: building and integrating shipping/carrier APIs (FedEx, UPS, USPS) for rate calculation, label generation, and order tracking — and building custom POS and inventory systems, like xPOS, an offline-first system with real-time multi-register sync, reporting, and AI-driven insights. I also build REST APIs, design databases, fix bugs, and maintain existing applications with clean, reliable code.... Read more

Skills

m
mohsindev01
Mohsin Javed
Offline • 
Average response time: 1 hour

See my services

API & Integrations
I will integrate fedex ups usps shipping api and automate order fulfillment
From$45 / projectMore details
Full Stack Web Applications
I will develop a custom pos system with inventory and ai insights
From$60 / projectMore details

Portfolio

Work experience

Frontendex

Software Engineer

Frontendex • Full-time

Jul 2025 - Present • 1 yr 2 mos

Software Engineer — Frontendex Remote | 1+ year Participated in production web application development using technologies such as React, Next.js, TypeScript, Node.js, Express, PostgreSQL, Prisma, and Docker. Created and managed scalable frontend and backend components for business applications. Implemented REST APIs, authentication, authorization, database operations, and real-time functionality. Developed a POS system and offline-first applications, including local data caching, synchronization, stock synchronization, and recovery after being offline. - Built and maintained desktop applications using Electron, alongside web applications. Used Redux Toolkit, Socket.IO, Tailwind CSS, Vite, Supabase, and Neon. - Identified and fixed production bugs related to APIs, databases, Docker, networking, synchronization, and application state. - Created and maintained automated tests and performed regression testing before deploying changes. - Used Git/GitHub with feature branching, pull requests, code reviews, rebasing, and conflict resolution. - Contributed to a development team by developing features according to technical specifications and project phases. Key Accomplishments - Successfully contributed to a large-scale POS system supporting offline sales, catalog synchronization, stock synchronization, and automatic recovery/synchronization when the connection is restored. - Enhanced application reliability by implementing request timeouts, error handling, gateway availability checks, and synchronization safeguards. - Implemented stock synchronization using batched API requests to accommodate backend limitations. Contributed to modular architecture and code refactoring, making large frontend applications easier to maintain. Created and maintained 2,000+ automated tests, helping ensure that new changes work correctly alongside existing functionality. Developed backend functionality using Nest