Anurag Singh

Built React/TypeScript web frontend features end to end, maintaining a shared design system across web and mobile client surfaces. Served as senior mobile engineer across Flutter, native Android (Kotlin/Jetpack Compose/Hilt), and native iOS (Swift/SwiftUI/Combine), shipping on 2-week Scrum sprints. Authored architecture and modular design standards across web/Flutter/native, introduced code-review gates, and improved onboarding time by ~40%. Designed native-vs-Flutter decision matrix for hardware access/performance constraints and owned release quality gates with staged rollouts. Mentored 4 junior engineers through pair programming and structured reviews; sustained post-release defect rate below 2%. Delivered inventory search and shipment-lifecycle improvements on an IBM Sterling OMS engagement, reducing order-lookup time by 45% and stuck-shipment tickets by 35%.

Built and maintained React/TypeScript web frontend features using Figma-to-code responsive, componentized UI integrated with REST APIs; contributed to backend endpoint design. Architected a Flutter mobile payments platform (digital wallet, NFC, QR) with end-to-end encryption and PCI DSS-aligned design, improving transaction success rate by 30% across 10,000+ monthly transactions. Defined Clean Architecture guidelines for 7 engineers across web/Flutter/native Android and enforced via lint rules, reducing defect density by ~25%. Designed a Firebase-based real-time social app (Firestore/Realtime DB/Cloud Functions) with a React web client, achieving 25% DAU growth in Q1. Enhanced CI/CD with GitHub Actions and Fastlane for automated signing, staged rollouts, and release-notes automation, reducing post-release issues by 20%.

Built a production FinTech Flutter app integrating Plaid (bank linking) and Onfido (KYC/AML), onboarding 5,000+ users under a GDPR-compliant Node.js/Express API layer. Developed a real-time HealthTech patient-monitoring app with native Android Kotlin background-sensor modules and achieved offline-first sync reliability of 99.5% for 1,000+ patients. Built native Android (Kotlin/Jetpack Compose/Hilt) and native iOS (Swift/SwiftUI/Combine) modules via Flutter platform channels using Pigeon for camera/NFC/sensor access. Reduced UI render latency by 35% via widget-tree refactoring, lazy loading, and state-management optimization; shipped 12 feature releases on biweekly sprints.