Ashish Kumar
Singh
Senior React Native Developer
iOS & Android | Scalable Mobile Apps
India (Noida)
I build high-performance, cross-platform mobile apps with a sharp focus on architecture, performance tuning, micro-animations, and clean, scalable code systems.
4+
Years of Craft
End-to-end Mobile Eng
20+
Apps & Features Shipped
Production-grade deliverables
5
Live Store Apps
iOS & Android publications
572+
DSA Solved
LeetCode problem-solving
RN · TS · EAS
Senior React Native Developer
Professional Summary
As a seasoned Mobile Systems Engineer with 4+ years of dedicated React Native experience, I specialize in architecting native integrations, implementing rigid security patterns, and structuring responsive user journeys. From multi-million dollar event transactions to real-time health sensor integrations, my focus remains on reducing rendering overhead, optimizing battery telemetry, and driving exceptional app-store rankings.
Technical Skills
Cross-platform mobile engineering stack — from native bridges to CI/CD.
Languages
Mobile
State Management
Backend
Databases
Tools
APIs
UI/UX
Integrations
Testing
Build & CI
Featured Projects
Production-grade mobile systems across health, fintech, and POS domains.
Hunuu Health
Enterprise-grade health and wellness platform tracking biometrics and personal health metrics.
A sophisticated healthcare tracking program that securely queries, processes, and normalizes telemetry data from 20+ connected health sensors (including Wearables, Apple HealthKit, and Google Fit). Integrated secure ML analytics to produce personalized medical insights and daily cardiac summaries.
Key Features
- Secured low-overhead ingestion of historical biometric sequences.
- Configured state-machine hooks safeguarding sensor sync cycles.
- Engineered real-time data visualizers tracking heartrate telemetry and blood sleep scores.
ExpoPay Customer
Premium public checkout experience for high-traffic events, supporting tickets, microtransactions, and instant QR entries.
A consumer-facing transaction interface supporting multi-currency event buying. Built on an offline-first payment queue architecture to guarantee consistent Stripe checkout completion under severely degraded field network bandwidths.
Key Features
- Zero-latency barcode generator rendering for immediate scanner clearance.
- Engineered memory-safe transactional states preventing duplicate voucher charges.
- High-contrast ticket screens validated for easy accessibility under extreme glare panels.
ExpoPay Exhibitor
Heavy-duty vendor app managing high-speed ticket redemption, attendee checks, and transaction auditing.
B2B infrastructure application built for exhibition hosts to process real-time attendee scans. Features highly optimized camera scanner hooks that run hardware threads independently resulting in sustained barcode reading speeds.
Key Features
- Custom multi-threaded optical recognition yielding 200ms scan callbacks.
- Architected local SQLite syncing to buffer checkins during server connection drops.
- Real-time analytics board tracking active visitor metrics.
Luby Pay
Highly secure digital financial wallet supporting bank transfers, balances, and digital card authorization.
A comprehensive digital vault wallet app that handles fast payments, money transfer receipts, and digital account ledger state. Hardened client boundaries using biometric authentication wrappers (FaceID / TouchID) and request encryption layers.
Key Features
- Custom high-performance PIN grid components styled with micro-animations.
- Secured data transit utilizing standard RSA payloads.
- Designed full screen-reader accessibility meeting strict compliance audits.
Ticktap mPOS
High-speed mobile point-of-sale utility connecting over NFC and Bluetooth to issue swift receipts and physical print logs.
A professional point-of-sale terminal software enabling smartphones to act as credit/debit card terminals. Built direct integrations into low-energy Bluetooth (BLE) printing arrays and hardware tape processors.
Key Features
- Custom serial print buffers streaming raw receipt code to Bluetooth thermal rolls.
- Optimized magnetic/chip read callbacks into Android host processes.
- Designed battery-safe background listeners maintaining continuous peripheral binding.
Work Experience
Building production mobile systems across health, fintech, and enterprise.
Senior React Native Developer
Infoicon Technologies
Jul 2025 - Present
Noida, India
- Architected secure cross-platform mobile apps using modular structures, improving team delivery velocities by 30%.
- Configured robust offline-first caching subsystems using Realm databases to guarantee sub-100ms UI response speeds.
- Established fully automated continuous integration workflows with EAS CLI and App Store Connect API keys, cutting visual release latency in half.
Junior React Native Developer
SMD Web Tech
Feb 2023 - Jul 2025
Noida, India
- Successfully modularized 5 commercial app releases from scratch into production-ready Android and iOS listings.
- Integrated secure financial layers, standard Stripe widgets, dynamic QR codes, and hardware biometric protection.
- Identified and eliminated layout lag by refactoring heavy flatlists using FlashLists, resulting in 60fps scrolling animations.
React Native Intern
Mobiloitte Technologies
Feb 2022 - Jun 2022
New Delhi, India
- Collaborated actively in agile team configurations to build early-stage interactive wireframes and components in React Native.
- Developed extensive understanding of native bridge properties, module resolution systems, and standard build debugging.
- Refined application states using lightweight Context APIs and Redux structures for fast data synchronization.
Education
B.Tech in Computer Science & Engineering
2018 - 2022Neelkanth Institute of Technology
Graduated with absolute focus in Computer Science Engineering, Software Development principles, Database Management Systems, and Mobile development architecture.
Let's Build Something Great
Open to full-time roles and ambitious mobile projects. Reach out anytime.