You will get upgrade and optimise your React Native or Expo app
Top Rated
Project details
You will receive a reliable, production-ready fix for your React Native or Expo application, not a temporary workaround. I will investigate the root cause of crashes, UI issues, API failures, navigation problems, dependency conflicts, build errors, performance bottlenecks, and iOS or Android-specific bugs.
As a Top Rated Plus developer with 15+ years of software experience and $600K+ earned on Upwork, I follow a structured debugging process: reproduce the issue, analyse the code and logs, implement a clean fix, test related workflows, and verify application stability.
Your existing architecture and functionality will be preserved wherever possible. You will receive maintainable code, regression testing, a clear summary of the problem and solution, and practical recommendations to prevent similar issues in the future. The goal is to deliver a stable, responsive, and user-friendly mobile application that is ready for continued development and release.
As a Top Rated Plus developer with 15+ years of software experience and $600K+ earned on Upwork, I follow a structured debugging process: reproduce the issue, analyse the code and logs, implement a clean fix, test related workflows, and verify application stability.
Your existing architecture and functionality will be preserved wherever possible. You will receive maintainable code, regression testing, a clear summary of the problem and solution, and practical recommendations to prevent similar issues in the future. The goal is to deliver a stable, responsive, and user-friendly mobile application that is ready for continued development and release.
Platform
Mobile WebApp Type
Hybrid AppDevelopment Technology
React Native, Kotlin, SwiftApp Purpose
Dating, Health & Fitness, Medical, News, Shopping, Social Networking, Streaming, TravelExpertise
Cross Browser & Device Compatibility, Design, LocalizationWhat's included
| Service Tiers |
Starter
$250
|
Standard
$500
|
Advanced
$750
|
|---|---|---|---|
| Delivery Time | 2 days | 3 days | 7 days |
Number of Revisions | 2 | 5 | 7 |
App Store Upload | - | - | - |
Source Code | - | - | - |
115 reviews
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JK
Jake K.
Aug 10, 2026
Build an App based on existing website
JW
Jamie W.
Jul 22, 2026
Phase 2 MobileWash Pro
This is closing out the 3rd of 4 major, fullstack modules for a complicated application. This team continues to do terrific work. High quality, accountable to outcomes, clear communicators. This module required iOS/android/web responsive build and some complicated external payment API integrations. This team truly is full stack. I could not recommend them more. I am willing to discuss live with anyone who wants more detail.
SB
Sam B.
Jun 9, 2026
30 minute consultation
Tausif made a clear plan to move forward when i had no idea what to do. He is very thoughtful and detail oriented. i am very happy
PE
Priceless E.
May 23, 2026
mobile app feature updates
ML
Maryam L.
May 16, 2026
This is not for a job post - I want to hire someone to create an app for me
Tausif was an excellent web developer. He was courteous, professional on time and always available. I would highly recommend him as he is seasoned and experienced.
About Tausif
Senior React Native Developer | iOS/Android App Development | AI Apps
97%
Job Success
Lahore, Pakistan - 4:13 pm local time
☑️ React Native • Mobile App Development • iOS/Android App Development • Expo • AI Mobile Apps
☑️ RevenueCat • In-App Purchases • Subscriptions • Apple IAP • Google Play Billing
I’m a Senior React Native Developer building, rescuing, modernizing, and scaling production-ready mobile apps for iOS and Android. From a new React Native MVP to an existing Expo app with broken builds, subscriptions, APIs, or store-release issues, I can own the full Mobile App Development lifecycle from architecture to production.
As Founder of Glowingsoft Technologies, I’ve helped deliver 900+ company projects across mobile, web, backend, cloud, and AI, with 197 Upwork jobs across mobile and full-stack products.
🚀 𝐑𝐄𝐀𝐂𝐓 𝐍𝐀𝐓𝐈𝐕𝐄 & 𝐌𝐎𝐁𝐈𝐋𝐄 𝐀𝐏𝐏 𝐃𝐄𝐕𝐄𝐋𝐎𝐏𝐌𝐄𝐍𝐓
◆ React Native & Expo apps for iOS and Android
◆ MVPs, SaaS products, and startup mobile apps
◆ Existing app rescue, bug fixing, and modernization
◆ Expo SDK, React Native, EAS Build, Xcode, and Android upgrades
◆ iOS Development, TestFlight, App Store Connect, and Apple review support
◆ Android App Development, Google Play Console, signing, and releases
◆ RevenueCat, In-App Purchases, subscriptions, and renewals
◆ Stripe, payment gateways, webhooks, and mobile monetization
◆ Push Notifications, deep linking, background tasks, and offline workflows
◆ Google Maps, GPS tracking, geolocation, and real-time location
◆ REST APIs, GraphQL, WebSockets, authentication, and integrations
◆ Firebase, analytics, storage, and real-time functionality
◆ AI Mobile App Development using OpenAI, Gemini, Claude, OCR, and LLM APIs
📱 𝐒𝐄𝐍𝐈𝐎𝐑 𝐑𝐄𝐀𝐂𝐓 𝐍𝐀𝐓𝐈𝐕𝐄 𝐃𝐄𝐕𝐄𝐋𝐎𝐏𝐄𝐑 | 𝐢𝐎𝐒/𝐀𝐍𝐃𝐑𝐎𝐈𝐃 𝐀𝐏𝐏 𝐃𝐄𝐕𝐄𝐋𝐎𝐏𝐌𝐄𝐍𝐓
My core expertise is React Native App Development and cross-platform Mobile App Development for production iOS and Android products.
I work with React Native, Expo, TypeScript, JavaScript, EAS Build, native modules, App Store Connect, Google Play Console, permissions, maps, push notifications, subscriptions, deep links, and device integrations.
For Android App Development, I handle builds, compatibility, background services, notifications, native modules, signing, Play Console submissions, and production troubleshooting.
For iOS Development, I handle EAS/Xcode builds, TestFlight, App Store Connect, certificates, provisioning, Apple In-App Purchases, review issues, and releases.
🤖 𝐀𝐈 𝐌𝐎𝐁𝐈𝐋𝐄 𝐀𝐏𝐏𝐒 & 𝐀𝐈 𝐀𝐏𝐏 𝐃𝐄𝐕𝐄𝐋𝐎𝐏𝐌𝐄𝐍𝐓
I integrate AI chat, document processing, OCR, recommendations, semantic search, voice workflows, assistants, automation, and structured LLM outputs using OpenAI, Gemini, Claude, and related APIs.
AI handles extraction, classification, search, or generation; deterministic application logic handles validation, permissions, calculations, payments, and workflow state.
🛠️ 𝐄𝐗𝐈𝐒𝐓𝐈𝐍𝐆 𝐀𝐏𝐏 𝐑𝐄𝐒𝐂𝐔𝐄 & 𝐌𝐎𝐃𝐄𝐑𝐍𝐈𝐙𝐀𝐓𝐈𝐎𝐍
I take over React Native apps with broken builds, dependency conflicts, Expo/React Native upgrade issues, crashes, API failures, subscription bugs, Android errors, native integration problems, App Store rejections, Google Play blockers, and unfinished features.
⚙️ 𝐌𝐎𝐁𝐈𝐋𝐄 + 𝐁𝐀𝐂𝐊𝐄𝐍𝐃 𝐎𝐖𝐍𝐄𝐑𝐒𝐇𝐈𝐏
A production mobile app is more than screens. I troubleshoot Node.js APIs, databases, authentication, webhooks, real-time services, admin dashboards, payments, and cloud integrations when issues originate outside the app.
🌍 𝐏𝐑𝐎𝐃𝐔𝐂𝐓 𝐄𝐗𝐏𝐄𝐑𝐈𝐄𝐍𝐂𝐄
Marketplace & On-Demand Apps • Booking Platforms • FinTech Apps • Healthcare Apps • Dating & Social Apps • Subscription Apps • GPS Tracking Apps • Field Service Apps • E-commerce Apps • SaaS Products • AI-Powered Mobile Apps
🏆 𝐖𝐇𝐘 𝐂𝐋𝐈𝐄𝐍𝐓𝐒 𝐂𝐇𝐎𝐎𝐒𝐄 𝐌𝐄
◆ Senior ownership from architecture through App Store / Google Play release
◆ Strong React Native + iOS/Android + backend debugging capability
◆ Product thinking, clear communication, realistic estimates, and release-focused decisions
🔎 𝐑𝐄𝐋𝐄𝐕𝐀𝐍𝐓 𝐒𝐊𝐈𝐋𝐋𝐒 & 𝐊𝐄𝐘𝐖𝐎𝐑𝐃𝐒
Senior React Native Developer | React Native Developer | React Native App Development | Mobile App Developer | Mobile App Development | React Native Expo | Expo Developer | iOS Development | Android App Development | iOS & Android App Development | Cross-Platform App Development | Hybrid App Development | Mobile App Bug Fix | Mobile App Design | AI Mobile App Development | AI App Development | TypeScript | JavaScript | API Integration | In-App Purchases | Push Notifications | Firebase | GPS Tracking
🚀 𝐋𝐄𝐓’𝐒 𝐁𝐔𝐈𝐋𝐃 — 𝐎𝐑 𝐑𝐄𝐒𝐂𝐔𝐄 — 𝐘𝐎𝐔𝐑 𝐌𝐎𝐁𝐈𝐋𝐄 𝐀𝐏𝐏
Need a Senior React Native Developer for iOS/Android App Development, Mobile App Development, or AI Mobile Apps? Send me your scope, and I’ll recommend the clearest path to production.
Steps for completing your project
After purchasing the project, send requirements so Tausif can start the project.
Delivery time starts when Tausif receives requirements from you.
Tausif works on your project following the steps below.
Revisions may occur after the delivery date.
Issue Review and Reproduction
I will review the source code, logs, screenshots, and reproduction steps, then recreate the issue on the affected iOS or Android environment.
Root Cause Analysis
I will inspect the relevant components, APIs, dependencies, native configurations, and application flow to identify the actual cause of the bug.