Mohamed
Idris.
Senior React Developer — 7.5 years building enterprise web apps at Comcast · Cognizant · Verizon · Walgreens.
Available for freelance projects & international / remote opportunities.
Engineered for
performance.
I build scalable, production-grade web applications that stand up to real enterprise load — architected for performance, tested for confidence, built to last.
At Comcast I lead React architecture for the FreeWheel MRM ad platform. Previously at Cognizant I drove a 60% performance uplift for Verizon and led the Walgreens vaccine booking app used by millions — with 100% CDC compliance.
I mentor engineers, run knowledge-transfer sessions, and champion clean, well-tested code as a team culture, not just a personal habit.
Where I've
built things.
- Led development of scalable SPAs using React.js, Hooks, Redux & TypeScript for the FreeWheel MRM platform — mission-critical ad tech infrastructure.
- Ran React & domain knowledge-transfer sessions, mentoring engineers on component architecture, Hooks & state management.
- Introduced Playwright-based automation achieving ~90% test coverage using AI-assisted acceleration.
- Ensured production quality via rigorous peer code reviews and architectural decisions.
- Built enterprise-scale React SPAs driving a 30% increase in user engagement through improved UI architecture.
- Integrated RESTful APIs, reducing data retrieval time by 60% and hitting PageSpeed scores above 80.
- Led the Walgreens vaccination booking app — 100% CDC compliance, WCAG accessibility, 30% surge in appointment bookings.
- Engineered 15+ reusable components for Verizon, boosting system performance by 60%.
- Engineered UI components with React, Redux & JavaScript — 25% application speed increase.
- Implemented GraphQL for a 25% system performance boost on IGoalZero.
- Built 15+ web applications and 6 e-commerce platforms — 40% increase in online transactions.
- Managed projects end-to-end with 95% client approval and 100% on-time delivery.
Things I've
shipped.
Built forecasting screens for a mission-critical ad management platform using React, TypeScript & Go backend integrations. Improved data visibility and stakeholder usability across the forecasting repository. Led knowledge-transfer sessions for the engineering team.
Revamped legacy enterprise app with React, Redux & Node.js. Engineered 15+ reusable components, complex API orchestration and strategic performance enhancements at scale.
Led the vaccination booking app used by millions — CDC compliant, WCAG accessible, cross-browser. 30% surge in appointment bookings post-launch.
Tourism platform with trip listings, admin booking panel, and split-payment support. Built with PHP, MySQL and Joomla CMS.
hello.
Whether it's a freelance gig, a full-time senior role abroad, or just a quick chat about React architecture — I'm always open. Response within 24 hours.