Kashan A.

I build production-grade React applications, design systems, and complex web platforms for startups and established companies. What you get working with me: ✔️ Clean, scalable component architecture that your team can maintain ✔️ Comprehensive testing (90%+ coverage) so bugs don't reach production ✔️ Design systems with Storybook documentation for consistent UI ✔️ Complex integrations (payments, APIs, third-party services) ✔️ Full-stack capability when needed (Node.js, Python, AWS) ✔️ Realistic timelines and clear communication throughout Recent projects: MonieWorld (Fintech Platform) ✔️ Founded frontend architecture processing £100K+ monthly transactions ✔️ Built global currency engine supporting 150+ currencies ✔️ Integrated multiple payment providers with unified abstraction layer ✔️ 90% unit test coverage, 95% E2E coverage with Jest/Playwright Archer Affiliates (Platform Redesign) ✔️ Led complete redesign delivering 50% revenue increase ✔️ Built Chrome extension with shared codebase (zero duplication) ✔️ Reduced support response time from 48 hours to 6 hours ✔️ Expanded to full-stack when backend became bottleneck Louise (Healthcare SaaS) ✔️ Built complete design system from scratch (40+ components) ✔️ Enabled CEO to secure investor funding with frontend-first approach ✔️ Implemented multilingual support for France and US markets ✔️ WCAG AA accessibility compliance Technical expertise: ✔️ Frontend: React, Next.js, TypeScript, Tailwind CSS, Material UI ✔️ Architecture: Domain-Driven Design, monorepo, microfrontends ✔️ Testing: Jest, Playwright, React Testing Library ✔️ Integrations: Payment systems (Stripe, Apple Pay, Google Pay), REST APIs, third-party SDKs ✔️ Backend: Node.js, FastAPI, REST APIs, Payload CMS ✔️ Cloud: AWS (S3, SES, IAM), Docker, CI/CD Specializing in complex React applications, design systems, and scalable web platforms across fintech, healthcare, and SaaS.