Ashish Kumar Singh
React Native Developer
Ashish Kumar
Singh
Senior React Native Developer
iOS & Android | Scalable Mobile Apps
I build high-performance cross-platform mobile applications with a strong focus on architecture, performance, animations, and scalable code.
Professional Summary
With over 3.5 years of experience building React Native applications for iOS and Android, I specialize in creating scalable, high-performance mobile solutions. My expertise spans MVVM and MVC architecture patterns, ensuring clean, maintainable codebases that scale with business needs.
I excel in state management using Redux and React Query, implementing robust authentication systems with Firebase, and integrating push notifications for enhanced user engagement. My work focuses on performance optimization, smooth animations, and seamless user experiences across platforms.
I have extensive experience integrating payment gateways, implementing data visualization with charts, working with device cameras, and building barcode scanning capabilities. My approach combines technical excellence with a product-focused mindset, delivering solutions that drive business value.
20+ Apps / Features
Delivered
Production-scale
Apps
Cross-platform
Expert
Performance-focused
Engineering
Technical Skills
Languages
Mobile
State Management
Backend Basics
Databases
Tools
APIs
UI/UX
Performance
Integrations
Testing
Build & CI
Featured Projects
Hunuu Health
Cross-Platform Health & Wellness Mobile App
Full-scale cross-platform healthcare application enabling users to sync health data from 20+ platforms (Apple Health, Google Health Connect, Fitbit, Garmin), analyze metrics with AI-powered insights, and manage patient–doctor interactions with secure data exchange.
Highlights
- •Integrated 20+ health platforms (HealthKit, Health Connect, Fitbit, Garmin) with real-time sync
- •Built unified health sync engine with platform-specific permissions and Google Health Connect production compliance
- •Implemented secure authentication with OTP login, Apple Sign-In, JWT access/refresh tokens
- •Developed AI-powered health analytics dashboards with Athletic/Readiness Scores
- •Built patient–doctor features: QR-based patient sharing, document upload, prescription management
- •Set up EAS Build & EAS Update for CI/CD, OTA updates, and automated production builds
Tech Stack
ExpoPay Customer App
Cross-Platform Event Payment & Ticketing App
Customer-facing mobile payment application for seamless event payments, ticketing, QR-based event entry, and transaction history management.
Highlights
- •Secure payment workflows including digital wallet, Stripe (Google Pay/Apple Pay), QR payments
- •Multi-step ticket purchase flow with add-ons, cart, and checkout
- •QR-based event entry and validation system
- •Transaction history and receipt management
- •React Query for optimized data fetching and caching
- •Secure OTP authentication and token storage with Expo Secure Store
Tech Stack
ExpoPay Exhibitor App
Event & Exhibitor Management Application
Complete exhibitor and organizer management application for event operations, real-time QR scanning, inventory management, attendee tracking, and analytics.
Highlights
- •Real-time QR scanning/validation system with batch scanning using Expo Camera
- •Complete event & exhibitor management modules with creation wizard
- •Inventory management, attendee tracking, and schedule management
- •Analytics dashboards with interactive charts, sales insights, and reporting
- •Multi-language support with i18next
- •CI/CD pipeline using Expo EAS with automated builds and OTA updates
Tech Stack
Luby Pay
E-Wallet Mobile Application
Mobile e-wallet application that transforms the way consumers transact on a daily basis. Luby Pay allows users to simplify the payment process with a secure and rewarding lifestyle e-wallet experience.
Highlights
- •High-performance React Native E-wallet application with MVC architecture
- •Reusable UI components for consistent user experiences
- •Swift implementation for iOS-specific features
- •RESTful API integration for real-time data synchronization
- •React Native animation libraries for smooth transitions
- •Firebase integration for real-time notifications
- •React Query for enhanced data fetching and caching strategies
Tech Stack
Ticktap mPOS
Mobile POS System Application
Mobile POS system for product orders, payment handling, and receipt generation. Integrated with NFC, camera, promotions, and Bluetooth printing capabilities.
Highlights
- •Mobile POS system for product orders and payment handling
- •Receipt generation with Bluetooth printing support
- •NFC integration for contactless payments
- •Camera integration for barcode scanning
- •Promotion and discount management
- •Real-time inventory tracking
- •Firebase integration for real-time updates
Tech Stack
Work Experience
Sr React Native Developer/Android & iOS
Infoicon Technologies
- ▸Architected and developed complete cross-platform Hunuu Health app using React Native 0.76, Expo, and TypeScript
- ▸Integrated 20+ health platforms (HealthKit, Health Connect, Fitbit, Garmin) with real-time sync for steps, sleep, HR, SpO₂
- ▸Built unified health sync engine with platform-specific permissions, entitlements, and Google Health Connect production compliance
- ▸Developed AI-powered health analytics dashboards with Athletic/Readiness Scores and interactive charts
- ▸Built patient–doctor features: QR-based patient sharing, document upload, prescription management, and health record access
- ▸Developed ExpoPay dual-app ecosystem (Customer & Exhibitor) for event payments, ticketing, QR validation, and analytics
- ▸Set up EAS Build & EAS Update for CI/CD, OTA updates, automated production builds, and runtime versioning
Jr React Native Developer/Android & iOS
SMD Web Tech Pvt Ltd
- ▸Developed high-performance React Native E-wallet applications (Luby Pay, TickTap Pay) implementing MVC architecture
- ▸Created reusable UI components, enhancing maintainability and streamlining development process
- ▸Utilized Swift to implement iOS-specific features, ensuring optimal performance on Apple devices
- ▸Integrated RESTful APIs for seamless communication with backend services and real-time data synchronization
- ▸Enhanced application performance using React Native's animation libraries for smooth transitions
- ▸Integrated Firebase for real-time notifications, keeping users informed about updates and important information
- ▸Implemented React Query to enhance data fetching and caching strategies, resulting in significantly better performance
- ▸Developed Ticktap mPOS system with NFC, camera, promotions, and Bluetooth printing integration
- ▸Developed comprehensive logging mechanisms to facilitate debugging and performance monitoring
React Native (Intern) - UI Developer
Mobiloitte Technologies
- ▸Designed and developed intuitive, responsive, and visually appealing mobile interfaces using React Native for both Android and iOS platforms
- ▸Translated design mockups and wireframes into high-quality UI components with pixel-perfect accuracy
- ▸Integrated custom animations and transitions using libraries like react-native-reanimated and react-navigation
- ▸Implemented responsive layouts using Flexbox, styled-components, and platform-specific design patterns
- ▸Utilized React Native CLI and third-party libraries to handle device features like camera, GPS, notifications, and local storage
- ▸Maintained clean, readable, and well-documented code following industry best practices and Git version control
Education
Bachelor of Technology
Key Areas of Study
Let's Build Something Great
I'm always open to discussing new opportunities, interesting projects, or just having a conversation about mobile development. Feel free to reach out!