Production Proven • 4.8+ Years

Krishan Lal

Senior React Native Developer

Senior React Native Developer with 4.8+ years of experience architecting and shipping production-grade Android and iOS apps end-to-end. Specialized in real-time systems — WebRTC, LiveKit and Telnyx-powered audio/video calling, live streaming, and WebSocket chat — plus native iOS/Android bridge development for AR and 3D features. Delivered high-performance social platforms, on-device AI chat, and secure multi-gateway payments (Stripe, PayPal, Apple Pay, Paydunya) across 20+ production apps.

Krishan Lal - Senior React Native Developer

Professional Experience

Demonstrated history of driving technical design, native modules, and production delivery.

ToXSL Technologies Pvt. Ltd.

Software Engineer (Mobile Lead)

Jan 2022 – Present · Panchkula, India
Key Engineering Contributions & Production Impact
  • Architected and shipped 20+ production-grade Android and iOS applications end-to-end using React Native, TypeScript, and native bridge modules.
  • Wired up real-time audio/video calling and live streaming pipelines using WebRTC, LiveKit, and Telnyx.
  • Engineered WhatsApp-style real-time messaging with WebSocket/Socket.IO, delivery states (sent, delivered, read), and typing indicators.
  • Developed native iOS (Swift) and Android (Kotlin) bridge modules for real-time 3D rendering and camera-based AR Try-On experiences.
  • Integrated on-device Small Language Model (SLM) offline AI chat engine that functions 100% without internet connectivity.
  • Implemented multi-gateway secure payment systems including Stripe, PayPal, Apple Pay, Paydunya, and Pay Stack.

Technical Skills Matrix

Organized by specialization areas matching production deliverables.

Mobile Development

React Native React Native CLI TypeScript JavaScript (ES6+) Android Native iOS Native

State & Architecture

Redux Toolkit Redux Context API Reusable Components API-driven Architecture Clean Architecture

Real-Time & Media

WebRTC LiveKit Telnyx WebSocket Socket.IO Live Streaming Audio/Video Calling

AI / AR / 3D & Bridging

SLM Offline AI Chat AR Try-On 3D View Models Native iOS/Android Bridge Camera-based Features

Payments & Gateways

Stripe 3D Secure PayPal Apple Pay Paydunya Pay Stack In-App Purchases

APIs, Services & Cloud

REST APIs Firebase & Firestore Push Notifications (FCM) Authentication & JWT Google Maps SDK Third-party SDKs

Tools & Store Release

Git & GitHub Xcode & Android Studio Flipper Debugger Fastlane TestFlight & Google Play Console Postman

Production Live Apps

Flagship production applications published on the Apple App Store and Google Play Store.

FLAGSHIP / CURRENT

ORB

React Native • TypeScript • WebRTC • LiveKit • Telnyx • SLM AI • AR/3D

Next-generation real-time mobile platform with low-latency WebRTC/LiveKit live streaming, audio/video conferencing, WebSocket messaging, offline on-device SLM AI chat, and native AR Try-On / 3D model visualization.

DUAL STORES

Alpha Padel

React Native • REST APIs • LiveKit • Redux Toolkit • Stripe

Comprehensive padel tournament ecosystem featuring live match video streaming, interactive bracket trees, referee scoring consoles, club court booking, and instant push notification alerts.

APP STORE

DubiSale

React Native • Socket.IO • Maps • Push Notifications • Image Pipeline

High-volume UAE marketplace application featuring real-time buyer-seller chat, location-filtered classified listings, instant auction bidding, automated multi-currency conversion, and verified seller badges.

DUAL STORES

ABG NextLevel

React Native • REST APIs • GPS Tracking • Google Calendar • Payments

Mobile platform for employees to manage jobs, schedules and communication in one place. Features real-time job assignment, status updates, time tracking, document handling, high-accuracy GPS tracking, Google Calendar sync, and digital signature capture.

APP STORE (DUAL APPS)

Ship Swift

React Native • REST APIs • Maps • Socket.IO • Push Notifications

End-to-end logistics platform consisting of two dedicated mobile apps: a high-efficiency Driver app with turn-by-turn routing and order lifecycle management, and a real-time Customer app with live vehicle telemetry and digital dispatch.

DUAL STORES

Baligan

React Native • Firebase • Media Pipeline • Push Notifications • RTL

Multi-role education platform connecting teachers, students and parents. Built communication and media-sharing flows, daily teacher photo/update posts, image/video gallery with native download support, and complete RTL localization.

APP STORE

مزادي | Mazady

React Native • Apple Pay • REST APIs • Push Notifications • Arabic RTL

Lebanese auction and marketplace platform featuring live item bidding, Apple Pay express checkout, location-based address selection, seller verification flows, and full Arabic RTL layout support.

20+ Production Applications Catalog

Broad portfolio across logistics, social, booking, education, e-commerce, and enterprise workflows.

IHub

Logistics / F&B

Unified platform to manage stores, restaurants and logistics services. Features order and booking management with API-driven charts on Firebase, with payments powered by Pay Stack.

Place Com

EdTech / Jobs

Student, company, and campus placement portal. Handles student profiles, campus details, and job postings with advanced save/reuse search filters and dynamic pie chart/graph views.

Lean Dispatch

Logistics Suite

E-commerce and dispatch logistics app connecting customers, store inventory vendors, delivery drivers, and logistics companies for real-time tracking and SLA on-time deliveries.

Scope

Social / Analytics

Social survey and resource platform featuring dynamic dark/light themes, survey data rendered dynamically into interactive graphs, WebSocket chat, and Stripe payments.

Dating App

Social / Dating

Swipe-card matchmaking UI with progress bars, distance-based matching algorithms, single/multi slider filters, OTP login, request-accept chat, and profile boost requests.

Smart-Work

Booking / Auto

Mechanic appointment booking app with Google auto-complete location, weekly garage availability calendars, multi-listing workshop management, and PDF/voice download support.

Presstix

Ticketing

Event ticketing and purchase app with location discovery, YouTube trailer embeds, calendar synchronization, Paydunya payment integration, and QR scan-based ticket validation.

E-Sanchari

Rental & Travel

Booking platform for outdoor activities, self-driving car rentals, and luxury yacht rides. Supports multi-event creation, GPS map tracking, and gatekeeper scan check-ins.

Poised

AI Catalog

Intelligent product catalog app covering food, catering, and event supplies. Products can be indexed manually or via AI-assisted automated data entry and photo categorization.

Doktu App

Telehealth

Telehealth and medical consultation app engineered completely serverless on Firebase (Auth, Firestore, Cloud Functions), eliminating separate server maintenance overheads.

Loopdin

Media Gallery

High-performance video and image gallery app with remote fetch, caching, video rotation handling, fast grid rendering, and native device gallery download triggers.

Astrand

AI Tools

AI-powered smart productivity mobile app providing on-device and cloud automation tools for workflows, text processing, and daily task acceleration.

BikeBop

Food Delivery

Live restaurant order and food delivery tracking app with real-time ETA estimates, driver updates, and synchronized delivery checkout statuses.

Adashi, Kimosdi, Coincoch & More

Fintech & Retail

Delivered diverse specialized production apps including Adashi (business finance), Kimosdi (retail e-commerce), Coincoch (training platform), Pick & Deliver, and UseMe.

Core Engineering Architectures

Deep technical implementations powering high-scale production systems.

WebRTC, LiveKit & Telnyx Real-Time Media Engine

Architected low-latency audio/video calling pipelines and live streaming broadcasts. Wired up ICE candidate negotiation, SDP exchange, SFU subscription trees, and automated reconnection fallbacks.

WebRTC • LiveKit • Telnyx • React Native • Socket.IO

On-Device SLM Offline AI Chat (Zero Cloud Latency)

Integrated small language models (SLM) directly on-device using native C++/Android/iOS runtimes, enabling conversational AI assistant responses without an active internet connection or server cost.

On-Device SLM • Native Bridge • React Native CLI

Native iOS/Android 3D & AR Try-On Bridge

Bridged SceneKit, ARKit (iOS) and ARCore, Sceneform (Android) directly into React Native components for real-time 3D interactive model rendering and camera-based augmented reality virtual try-ons.

Swift • Objective-C • Java • Kotlin • ARKit • ARCore

WhatsApp-Style Real-Time Messaging Architecture

Built end-to-end messaging pipeline featuring WebSocket sync, local SQLite/Room caching, sent/delivered/read double ticks, live typing indicators, online/offline presence, and media compression.

WebSocket • Redux Toolkit • SQLite • FCM Push

Secure Multi-Gateway Payment Abstraction Layer

Standardized payment abstractions across 20+ production apps, supporting Stripe 3D Secure, Apple Pay, PayPal, Paydunya, and Pay Stack with seamless server webhook reconciliations and fraud checks.

Stripe • Apple Pay • PayPal • Paydunya • Pay Stack

GPS Background Fleet Tracking & Geofencing

Engineered battery-optimized geofencing, background foreground services, live Socket.IO position updates, and driver dispatch algorithms for transportation and logistics platforms.

Google Maps SDK • Geofencing • Socket.IO • Background Task

Education & Qualifications

Kurukshetra University

Bachelor of Computer Applications (BCA)

Graduated 2021 · Kurukshetra, Haryana, India

Core curriculum in Computer Science, Data Structures & Algorithms, Object-Oriented Programming, Database Management Systems (DBMS), and Software Engineering methodologies.

Sewak Computer Training Institute

Diploma in Computer Application (DCA)

Completed 2018

Comprehensive training in foundational computer applications, systems software, and fundamental programming concepts.

Language Proficiencies

Communication

Fluent and professional communication in English and Hindi for international clients, agile ceremonies, and cross-functional team leadership.

Get In Touch

Let's Build Something Exceptional Together

Available for Senior React Native Developer roles, mobile architecture consultations, real-time media projects, and full-time engineering opportunities.

Panchkula / Chandigarh, India
+91 9992724729
kl268369@gmail.com

System Architecture

Available for Senior / Lead Roles • Let's Connect
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Appearance & Theme

Customize lighting mode and cyber glow accent.