Hema Sai

Results-driven Senior React Native Developer with 4+ years of experience engineering high-performance iOS and Android applications across Fintech & E-commerce domains. Skilled in optimizing mobile app performance, implementing biometric authentication, and building scalable SDKs. Proven track record of leveraging data-driven analytics (CleverTap, GrowthBook, Microsoft Clarity) and modern CI/CD pipelines in Agile environments.

React Native Developer at OpsTree Global (2025-02 – 2026-06)

Project: DealShare

• Architected an end-to-end BNPL & payment platform using React Native, Redux, Juspay and LazyPay (PayU), implementing modular OTP, wallet, saved-payment, preferred-payment and retry flows to improve checkout reliability and reduce drop-offs.
• Led config-driven billing architecture across Cart, Orders and Success flows, standardizing MRP, delivery charges, refunds, wallets and coupons for consistent billing across payment journeys.
• Engineered Event Emitter-based state synchronization for Nested Grammage Variants across PDP, Search, PLP and Cart, eliminating stale UI states and delivering 60 FPS interactions through reusable Animated API components.
• Optimized PLP, Search and Product Discovery with dynamic filters, quick filters, pre-search, auto-suggestions, deep linking and API edge-case handling, supporting a stable experience for 50K+ users.
• Built a scroll-aware Floating Cart/FAB synchronized with bottom-tab navigation, increasing usable screen real estate by 15% across PDP, Search and shopping journeys.
• Integrated CleverTap, Microsoft Clarity, GrowthBook, Ad-Osmos, Truecaller, enabling analytics, A/B testing, session replay and feature experimentation; native In-App Review integration contributed to a 4.6★ Play Store rating.
• Led Android 16KB Page Support, React Native upgrades, Play Store compliance, while resolving 15+ production issues and independently driving RCA, API coordination, QA/UAT and production releases.

React Native Developer at OpsTree Global (2026-06 – 2026-10)

Project: Attendance Tracker (POC)

• Architected cross-platform React Native workforce management app using TypeScript, integrating biometric authentication (FaceID/TouchID) and location-aware (GPS) verification for secure employee attendance tracking.
• Implemented advanced computer vision and identity validation flows using native camera access, facial landmark processing, and liveness detection algorithms to eliminate proxy check-ins.
• Managed multi-brand environment variants and native module integrations for seamless deployment.

React Native Developer at TechEnhance Pvt. Ltd (2024-07 – 2024-11)

Banking Application SSFB

• Engineered a standalone SDK to embed the banking application as a package in 3 partner applications, streamlining cross-application onboarding and enabling secure data auto-population.
• Built journey-resumption logic to route users back to abandoned account creation screens, successfully reducing user drop-off rates.
• Developed reusable components to maintain design consistency, reducing new feature build time by approximately 30%.
• Implemented live database validations for mobile numbers and email addresses to enhance onboarding security.

React Native Developer at Lobb Engineering (2024-02 – 2024-03)

• Delivered UI components adhering to Atomic Design principles, accelerating feature development velocity for the product team.

React Native Developer at Tudo Technologies Pvt Ltd (2022-09 – 2024-01)

Bharath Thakur Art

• Led end-to-end mobile app development in a cross-functional team, reducing production bugs by 40% through advanced debugging and enforced code quality standards.
• Implemented real-time data synchronization with Firebase Firestore and Google OAuth, serving over 50K active users.
• Restructured React Navigation hierarchies into modular nested flows, boosting overall session retention.
• Patched plugins and upgraded the React Native version to meet Play Store privacy requirements, maintaining zero-crash production stability.

React Native & React JS Developer at Uvaan Infotech Pvt Ltd (2021-07 – 2022-09)

Biryani St.

• Improved test coverage by 30% through rigorous Test-Driven Development (TDD) using Jest for unit and integration testing across core modules.
• Applied Redux and Redux-Saga for efficient data synchronization and advanced search/filter capabilities in an E-commerce application.
• Built user-friendly ReactJS interfaces for a financial web application to streamline invoice tracking, file uploads, and VAT/shipping variance calculations.

B.Tech in Mechanical Engineering – PBR VITS (2016 – 2020)