Suman Kumar Sinha, Software EngineerSumanKumar Sinha

Rebuilt most of Lifestack's React web app before launch. The product grew from roughly 10-15K to 30K+ users and reached #4 Product of the Day.

Part-time from Oct 2024 to Mar 2025, then full-time. This overlapped Ellenox through Jun 2025.

• Improved day-timeline responsiveness and Home-to-Data View transitions with requestAnimationFrame, chunked rendering, and lazy loading.
• Built Team Plan across frontend and backend, including shared tasks and calendars, roles, permissions, invites, assignments, timezone display, and Kanban views.
• Delivered nine calendar and task integrations with near-real-time sync through webhooks, Cloud Functions, and Firestore, including conflict and duplicate handling.
• Integrated React with Node.js APIs through OpenAPI-generated clients, added selected backend endpoints, and contributed to a shared TypeScript package across web, mobile, and backend repos.
• Built the macOS Electron app and automated signed releases through GitHub Actions and Google Cloud.
• Added Cypress E2E tests for onboarding and Jest tests for UI and task-sync integrations.

Co-built GOLF.com Course Finder, the OpenLinks frontend and map, responsive Unboard interfaces, and an internal hiring platform.

• Built Course Finder's map/list views, search, filters, course cards, markers, detail pages, and responsive layouts as one of two engineers.
• Improved map performance across roughly 16,000 courses with bounds-based fetching and smarter marker behavior.
• Owned the entire frontend of an internal hiring platform supporting 14,000+ applicants across multiple job postings.
• Developed React Native and Expo features for a mental health platform connecting people with professional therapists.

Built the admin dashboard and test-booking frontend for a pharmaceutical audit application with Next.js, Firebase, and responsive Material UI layouts.