NEW APPS & MVPS
React Native app development
I build React Native apps for Android and iOS, from product flows and interface design through API integration, testing, and store release.
See what’s included AVAILABLE FOR FREELANCE PROJECTS
Senior React Native Developer for iOS & Android
I’m Girraj Sharma. I build and fix React Native apps—from delivery and community products to a shared platform supporting 300+ branded apps.
Based in Muscat and working with clients worldwide.
React Native · Expo · TypeScript · Performance · Offline sync · Maps · Payments
SCROLL00 / SERVICES
Build it.
Improve it.
I can take on a complete React Native build, a focused improvement, or ongoing work on a product already in use.
FEATURES, SPEED & STABILITY
Improve an existing app
I add features, fix production issues, and improve slow or complex screens by finding the cause instead of masking the symptom.
See what’s includedAFTER LAUNCH
Ongoing product support
I help teams maintain live apps, deliver the next set of features, handle releases, and keep the codebase ready for future work.
See what’s includedENGAGEMENT OPTIONS
Project-based
A defined scope and clear milestones for a build or feature.
Ongoing support
Regular development, maintenance, and release help as your app evolves.
01 / SELECTED WORK
Products built for
real life.
A selection of delivery, community, commerce, fitness, and offline-first products I’ve helped build and improve.
KHEDMAH DELIVERY
Your order is on its way
18MIN TO ARRIVAL
Order confirmed
Prepared with care
Driver on the way
Customer, driver, and vendor applications for a connected delivery experience.
- Google Play downloads
- 100K+
Used caching and API optimizations to reduce typical app opening time from 4–8 seconds to 2–3 seconds, alongside render improvements and production monitoring.
Explore case study02 / PROJECT ARCHIVE
A closer look.
Each case study explains the product, the work I handled, the technical choices, and the outcome.
PRODUCTION / DELIVERY ECOSYSTEM
Khedmah Delivery
Connecting every side of delivery.
- Google Play downloads
- 100K+
INSIGHTS / TECHNICAL CASE STUDIES
How I approach
the hard parts.
Practical notes on React Native performance, offline data, location tracking, and modernizing established apps.
01
TECHNICAL IMPLEMENTATION STUDY
React Native Performance Optimization Case Study
How startup work, rendering, caching, local data, and monitoring affect the way a React Native app performs in production.
4–8s → 2–3s startup02
ARCHITECTURE
Offline-First React Native App Architecture
How local data, background synchronization, and recovery paths keep an app useful when the connection is unreliable.
20% faster startupFREE RESOURCE / RELEASE CHECKLIST
Before your next release.
A practical starting point for reviewing the flows that can break between a working demo and a dependable mobile app.
50 CHECKS · NO SIGNUP
React Native Production Checklist
Review startup, API failures, offline data, payments, permissions, and release readiness. Use the checklist in your browser or download a copy for your team.
Open the free checklist →SEE THE WORK BEHIND THE ADVICE
Investigating slow startup →Maintaining a platform for 300+ sub-apps →Designing for unreliable connections →03 / EXPLORING
Learning beyond mobile.
A personal backend project that connects mobile product decisions with the systems behind authentication, content, payments, and administration.
PERSONAL PROJECT / BACKEND
Learning & Video Platform
A working backend for users, courses, videos, payments, chat, search, and administration.
HOW WE WORK
Clear from scope
to release.
We agree on priorities, review work in useful stages, and keep the next decision visible throughout the project.
Discover
Understand your users, business goals, and existing product.
Define
Agree on scope, priorities, and reviewable milestones.
Build
Develop in focused increments and share progress regularly.
Test
Check key journeys, device behavior, and release readiness.
Launch
Prepare Android and iOS builds and support store submission.
Support
Resolve issues and plan improvements after release.
04 / ABOUT
The
introduction.
I’m Girraj Sharma, a React Native developer with more than five years of experience building and maintaining mobile products for Android and iOS.
I work with founders and product teams on new apps, existing codebases, and the releases that follow. My experience covers delivery, e-commerce, taxi, fitness, education, logistics, and pet care.
MUSCAT, OMAN · AVAILABLE REMOTELY5+Years in mobile engineering
50+Apps I’ve worked on
5.0 / 5Rating on Fiverr & Upwork
STACK
Tools I work with.
Mobile
- React Native
- React Native CLI
- Expo
- Expo EAS Build
- TypeScript
- JavaScript
- React Navigation
State & data
- Redux Toolkit
- Zustand
- React Query / TanStack Query
- Context API
- REST APIs
- SQLite
- Offline sync
Product integrations
- Payments
- Stripe
- Firebase & FCM
- Maps
- Deep linking
- Location services
- Push notifications
- Real-time chat
Backend engineering
- Node.js
- Express
- Prisma
- MySQL
- Redis
- JWT
- Zod
- File uploads
- Payment webhooks
- Background jobs
Delivery & tooling
- Git
- Sentry
- TestFlight
- Xcode
- Android Studio
- Play Console
- Docker Compose
- OTA updates
05 / EXPERIENCE
The teams
I’ve worked with.
Khedmah Delivery
Senior Software Engineer · Muscat
The Ninehertz
Senior Software Engineer · Jaipur
Code Brew Labs
Mobile App Developer · Chandigarh
BEFORE WE START
Useful details.
Who is Girraj Sharma and where does he work?+
I’m Girraj Sharma, a Senior React Native Developer based in Muscat, Oman. I’ve worked in mobile development since January 2021 and collaborate remotely with founders and product teams worldwide.
What kinds of apps have you worked on?+
My work includes Khedmah Delivery’s customer, driver, and vendor apps, DogPack’s pet community features, the Royo Orders multi-service platform, and SnapHatch’s offline-first fishing experience. The case studies explain my contribution to each product.
What do you need to get started?+
Share your idea, target users, the main features you need, and any existing designs or code. We can then discuss scope, priorities, and a practical next step.
Can you work on my existing app?+
Yes. I can help with new features, bugs, integrations, maintenance, and performance. Reviewing the current codebase helps establish the right scope.
Do you develop for both Android and iOS?+
Yes. I use React Native to build for both platforms, with attention to platform-specific behavior and release requirements.
How long will my project take?+
Timelines depend on the feature scope, design readiness, integrations, and the state of any existing code. An estimate follows a discussion of those details.
Can you help after launch?+
Yes. Maintenance, issue resolution, backend/API work, further features, and release support can be included. Support hours and response times are agreed per project.
06 / CONTACT
Tell me about
your app.
Starting an MVP, fixing a slow app, or adding a feature? Share the main user flow, your current stack, and any target date. For an existing app, include a store link or a short description of the issue. I’ll help identify the next step and what’s needed to estimate the work.
Initial reply within one business day.
EMAIL ME DIRECTLYcontact@girrajsharma.devWHATSAPP+91 96025 11851