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Valliappan Periannan

@valliappanperiannan

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React Native Lead Engineer focused on offline-first, high-performance mobile apps.

India

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What I'm looking for

I’m looking for a React Native role where I can lead architecture for offline-first systems, drive UI and startup performance, and mentor engineers to deliver reliable, delightful enterprise mobile products.

I’m a React Native Lead Engineer with 8+ years building high-performance, production-grade mobile applications for iOS and Android. My deep expertise in React Native internals—Fabric Renderer, Yoga Layout Engine, and native module bridging—lets me deliver highly optimized, fluid user experiences.

I lead mobile teams to define architecture standards and ship features that are measurable and reliable. I specialize in identifying and resolving performance bottlenecks through profiling and targeted optimization, improving render times, app startup speed, and overall app stability.

Across enterprise platforms, I’ve engineered offline-first systems that keep the app fully functional in zero-connectivity environments, using local data sync, conflict resolution, and resilient storage strategies. I’ve also modernized UI performance by eliminating unnecessary re-renders, leveraging lazy loading and component memoization, and applying FlatList virtualization for smoother 60fps experiences.

I’m motivated by building mobile experiences that are fast, resilient, and delightful to use, while creating repeatable engineering practices for teams to follow. From performance audits and code reviews to technical mentorship and requirements-to-roadmap collaboration, I bring an execution-focused mindset to every release.

Experience

Work history, roles, and key accomplishments

Current

Lead Software Engineer

Current

ValGenesis Pvt Ltd

Mar 2025 - Present (1 year 3 months)

Architected and delivered high-performance, offline-capable enterprise mobile apps using React Native, optimizing load times, UI interactions, and data integrity in zero-connectivity environments. Led performance audits and engineering mentorship to improve stability and accelerate delivery.

React Native Performance Profiling TypeScript CI CD

Mobile Development Manager

Bytize Technology Solutions

Jun 2024 - Mar 2025 (9 months)

Directed mobile architecture strategy and led teams across POS and eCommerce platforms to improve scalability and transaction reliability. Established engineering best practices, code review workflows, and stakeholder-aligned roadmaps to improve delivery velocity.

Mobile Architecture Agile Scrum Technical Mentorship Code Review Roadmapping POS systems Scalability Cross Functional Collaboration

Lead Mobile Developer

Bytize Technology Solutions

Mar 2023 - Jun 2024 (1 year 3 months)

Led cross-platform React Native development for POS and CRM applications, mentoring junior developers and enforcing architecture standards. Delivered end-to-end product features and drove TypeScript adoption to improve type safety and reduce runtime bugs.

React Native TypeScript Redux toolkit Cross Platform Development Technical Design

React Native Developer

Bytize Technology Solutions

Jun 2019 - Mar 2023 (3 years 9 months)

Built cross-platform React Native applications for POS and enterprise platforms to support retail and commerce workflows. Implemented deep linking, real-time data synchronization, and device integrations for NFC and printers/payment terminals.

React Native React Javascript (ES6)Deep Linking NFC REST APIs

iOS Developer

Bytize Technology Solutions

Jun 2018 - Jun 2019 (1 year)

Developed Swift-based iOS applications for POS and eCommerce, including payments, inventory, and transaction flows. Collaborated with cross-functional teams to deliver consistent user experiences across iOS and Android counterparts.

Swift UIKit SwiftUI iOS app development Payments REST APIs

Android Developer

Bytize Technology Solutions

Sep 2017 - Jun 2018 (9 months)

Self-learned Kotlin and introduced it into the Android codebase to improve readability and maintainability. Developed POS features and integrated thermal printers and payment devices into Android applications.

Kotlin POS Features Thermal Printers Android App Development

Android Intern

Bytize Technology Solutions

Jun 2017 - Sep 2017 (3 months)

Joined as one of the first developers and built core understanding of Android development from scratch. Assisted development of Android applications and foundational platform features for the company’s product suite.

Android Development Core Platform Features Team Collaboration