Niloy Rudra Software Engineer

Langphy is an AI-powered German language learning app targeting 15M+ learners worldwide. I architected and delivered a distributed backend using an event-driven, stateless microservice design with horizontal scaling to support millions of concurrent Android users across Asia-Pacific and Europe. I built an end-to-end NLP pipeline (audio → Faster-Whisper → spaCy → rubric-based feedback) achieving ~90% feedback consistency, and reduced API response times by 40% through backend optimizations. I also deployed a tablet-ready React Native app with Figma-accurate UI, an offline-first SQLite strategy, and Jest-based automated testing.

Worked on a Germany-based dog food brand platform with a dynamic product catalog and variant-based pricing, improving checkout experience, security, and upsell revenue. Built a WooCommerce storefront covering catalog, cart, product pages with variant selection, pricing logic, and inventory display, reducing load times by 30% via performance optimization and CDN integration. Enhanced backend security and API integrity by integrating a robust cart and upsell system, increasing upsell revenue by 25%. Improved user engagement by 20% through UI/UX improvements with GDPR-compliant data handling and checkout optimization.

Built a UK real-estate brand web platform and a cross-platform React Native mobile app for property listings, search, and client management across iOS and Android. Implemented company website and app features including property listings, search filters, lead capture, and integrations with Stripe, Firebase, and Twilio. Managed client-side state with Redux synchronization, implemented real-time notifications, and built secure file sharing for client-agent communication. Developed a React Admin panel with OAuth 2 authentication plus GDPR-ready privacy controls and role-based access for property and user management.