BARATH ERULAPPAN
I’m a React Native engineer and full-stack developer with 2+ years of hands-on experience building a live fintech money exchange app used by 200,000+ active users across Android, iOS, and Huawei AppGallery.
About
I’m a React Native engineer and full-stack developer with 2+ years of hands-on experience building a live fintech money exchange app used by 200,000+ active users across Android, iOS, and Huawei AppGallery. At Cogniwide, I owned architecture and delivery end-to-end as the sole engineer, integrating production features like biometric authentication, Apple Pay through custom Swift native modules, secure transaction flows, PDF generation, maps, and multi-store releases via Fastlane and CI/CD.
I enjoy solving complex reliability and security problems—optimizing app performance (including lazy loading and the Hermes engine) to maintain smooth 60 FPS, and supporting security audits with strong protections like AES encryption, jailbreak detection, and secure key handling. Alongside product delivery, I’ve also worked on additional enterprise-facing React Native initiatives, mentoring junior developers and shaping UI/requirements using tools like Figma, REST APIs, and modern state management.
- 2 years' experience
- Joined September 2026
Industry experience
- Financial Services
- Software & Internet
Work experience
Supported a React Native frontend for a School Management app as a senior engineer, mentoring two junior developers and driving architecture decisions. Collaborated with stakeholders on an enterprise Visa Management System initiative, focusing on React with Vite and Tailwind CSS. Completed UAT and moved the work toward pre-launch activities.
Solely architected, built, and shipped a live money exchange app serving 200,000+ active users across Android, iOS, and Huawei AppGallery. Owned design and implementation decisions while coordinating backend integration, security audit readiness, and multi-store releases. Delivered financial transaction flows with 99.9% reliability and integrated REST APIs with real-time data sync. Implemented biometric authentication (Face ID/Fingerprint) and Apple Pay by creating custom Swift native modules, plus PDF generation, maps, and multiple production features. Optimized performance to reduce load time by ~30% and maintain 60 FPS using lazy loading, Hermes, and Reanimated. Supported CI/CD using Fastlane and GitHub Actions for App Store, Google Play, and Huawei AppGallery releases; ensured security controls such as AES encryption, jailbreak detection, and secure key storage with zero vulnerabilities.
Education
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