Chris Rachel Shaji

Fitness tech platform — web & mobile

• ▹Leading end-to-end frontend architecture for a fitness SaaS platform, driving migration of legacy repositories to modern Next.js app router patterns and latest React best practices.
• ▹Engineered and optimised React Query data-fetching layer — reducing redundant API calls, improving cache strategies, and cutting perceived load time across key user journeys.
• ▹Integrated Stripe and multiple third-party payment gateways, owning the full checkout and subscription flow with robust error handling and edge-case coverage.
• ▹Built and maintained a CMS portal enabling content teams to manage platform data without engineering dependency, accelerating content release cycles.
• ▹Implemented GA4 analytics and Hotjar session tracking with custom event instrumentation and cookie consent management (GDPR-aligned).
• ▹Introduced Sentry for real-time error monitoring and alerting, significantly reducing mean-time-to-detection for production issues.
• ▹Drove consistent UI delivery through a dual design-system approach — MUI for component scaffolding and Tailwind CSS for utility-first styling.
• ▹Leveraged Claude API and GPT-4 for AI-assisted features — content pipelines, prompt-driven data transformations, and intelligent UX flows within the CMS portal.
• ▹Daily use of GitHub Copilot and Cursor AI for code generation, refactoring, and codebase-aware architectural decisions, measurably accelerating development velocity.

Digital banking & insurance journeys

• ▹Architected end-to-end digital insurance journeys for Mashreq's mobile banking app and web platform using React Native & TypeScript, enabling seamless multi-product purchase flows.
• ▹Spearheaded financial planning tools — child education and retirement calculators — through modular, real-time interactive components.
• ▹Redesigned insurance dashboard and integrated Google Analytics, driving a 20% uplift in insurance inquiry leads.
• ▹Built shared component & utility library reducing code duplication by 30% and cutting feature dev time by 40%.
• ▹Optimised initial app load time by 2 seconds via bundle splitting, lazy loading, and render optimisations.
• ▹Integrated 20+ REST API endpoints with consistent error handling, loading states, and user feedback.
• ▹Maintained 80%+ unit-test coverage with Jest + SonarQube quality gates, significantly reducing QA escapes.
• ▹Led a cross-functional squad of 6+ onshore/offshore engineers — mentoring, code reviews, sprint ceremonies, technical interviews.

Tigo POS (Millicom) & 2UP Dating App

• ▹Led front-end for Tigo POS (Millicom) and 2UP Dating App across React and React Native, shipping responsive, production-grade interfaces.
• ▹Migrated 80% of legacy JavaScript codebase to TypeScript, improving type safety and eliminating runtime error classes.
• ▹Built a reusable 10+ component library documented in Storybook, adopted across multiple project teams.
• ▹Reduced app crash rate by 40% via enhanced error boundaries and analytics monitoring.
• ▹Cut average page load by 1.2 seconds through bundling and asset optimisation.
• ▹Managed JavaScript monorepo with Lerna; implemented OAuth, Google Maps, AWS S3, and native camera integrations.

EdgeOps & Logility ERP

• ▹Built front-end for EdgeOps (build pipeline management) and Logility ERP (supply chain), including real-time dashboards and data-transformation interfaces.
• ▹Improved performance by 25% via component optimisation and lazy loading; reduced API-handling bugs by 35% with Redux/Saga architecture.
• ▹Implemented OAuth 2.0 / OpenID Connect with role-based access control; mentored junior engineers and led offshore team delivery.