Muhammad Muzammil
Work

Experience

Lead engineer and freelance full-stack developer for MVPs, SaaS, web apps, and mobile apps.

I design and ship web applications, mobile apps, and SaaS products. Over six years I have taken work from technical architecture and hands-on development through client onboarding, requirement gathering, and release. The stack I use most is React, Next.js, React Native, Node.js, NestJS, and Laravel, with Docker, AWS, and GCP for delivery.

Founders hire me when they need an MVP in people's hands, a SaaS product with accounts and data, or an existing web or mobile codebase carried forward.

HashPotato

Lead Software Engineer

December 2024 – June 2026

Stack: React, Next.js, React Native, Node.js, NestJS, Laravel, Docker, AWS, and GCP.

I led engineering at HashPotato, including a team of 12 developers working on web and mobile products.

  • Ran agile sprint cycles and structured code review. Team productivity rose by 40%.
  • Brought ChatGPT, Claude, and Cursor into daily engineering work. Repetitive manual effort dropped by about 35%, and feature delivery was about twice as fast.
  • Trained the team on engineering standards, AI-assisted workflows, and clean code. Bug density fell by 30%. New-member onboarding went from 2 weeks to 4 days.
  • Delivered multiple product releases on schedule, holding performance, scalability, and quality to the same bar.
  • Tightened CI/CD pipelines and sprint cadence. Average time to delivery fell by about 25%.
  • Owned client engagement from requirement discovery and stakeholder meetings through product handoff. Delivery stayed on time across those accounts.
  • Kept engineering, clients, and stakeholders aligned through each project.

Software Engineer Level 2

April 2024 – November 2024

Stack: React, Next.js, React Native, Node.js, PHP, Laravel, Docker, and AWS.

  • Shipped iOS and Android experiences in React Native. Screen load times fell by 30%.
  • Built RESTful APIs on Node.js for web and mobile products. Query optimization and caching cut average response latency by 20%.
  • Reworked full-stack architecture on Laravel and Node.js so the applications could carry high concurrent use.
  • Centralized third-party services and payment gateways. Vendor onboarding time fell by about 40%.
  • Introduced React Query and Zustand for state management. Rendering performance improved by 20%, and UI defect reports dropped.

Viabletree

Software Developer

April 2022 – March 2024

Stack: React, Next.js, React Native, Node.js, Sails.js, PHP, Laravel, Docker, and GitHub.

  • Rebuilt the public website in Next.js and Tailwind CSS. Lighthouse performance scores rose by 35%.
  • Built interactive interfaces in React and Next.js. Engagement rose by 25%, and bounce rates fell on core pages.
  • Unified API contracts across Sails.js, Laravel, Node.js, and Next.js. API error rates fell by 15%.
  • Rebuilt React Native modules. Crash rates fell by 25%, with the same behavior on iOS and Android.
  • Shipped a Reels-style media module, from API integration and state through animation, with no critical defects after launch.

EvolutionWing

Full-Stack Web Developer

September 2021 – March 2022

Stack: PHP, Laravel, Node.js, MySQL, PostgreSQL, and React.

  • Designed MySQL and PostgreSQL schemas for consumer platforms. Indexing and stored procedures cut query time by up to 40%.
  • Built REST APIs in Laravel and Node.js for mobile and web clients. Average response time fell by 20%.
  • Built role-based React admin dashboards. Internal reporting cycles shortened by 30%.
  • Took a dating platform and an online coupon marketplace from the first version to production, including architecture, features, and third-party services.
  • Integrated Stripe, PayPal, and PayTabs, with multi-currency payments and webhook-driven orders. Transaction success stayed at 99.9%.

Techsolvvo

Senior Web Developer

February 2020 – July 2021

Stack: PHP, Laravel, Node.js, MySQL, Docker, and GitHub.

  • Designed database schemas and tuned queries. Execution time on heavy operations fell by more than 50%.
  • Built full-stack applications on Laravel and Node.js, with reusable services that shortened later feature work by about 20%.
  • Shipped admin panels for business workflows, so operations teams could work from live data. Manual reporting requests fell by 40%.
  • Integrated PayPal, Stripe, and Venmo, with webhook-driven order handling.

Selected product work, including Dominova, KollabKey, and The Fitness Directory, is on the projects page.