Available for freelance work

Building Digital
Products That
Actually Work.

I'm Usama Sadiq — a Full Stack & React Native Developer with 4+ years of experience. I've built 15+ production apps across healthcare, social media, fintech, and wellness domains for clients worldwide.

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Usama Sadiq
15+
Apps Published
4+
Years Experience
iOS & Android
Cross-Platform
About Me

Turning Ideas Into Scalable Digital Products

I'm a Full Stack & React Native Developer with 4+ years of experience building production-ready applications. Based in Karachi, Pakistan, I work with clients globally to deliver mobile apps, web platforms, and backend systems.

I specialize in the complete product lifecycle — from initial architecture to App Store deployment and post-launch maintenance. My focus is always on clean code, great UX, and measurable results.

✓Full Stack Web Development
✓Cross-platform Mobile Apps (iOS & Android)
✓App Store & Play Store Deployment
✓Backend APIs & Databases
✓Payment & Subscription Systems
✓Workflow Automation (n8n)
Skills

Tech Stack & Skills

Technologies I use to build production-ready products

Languages

JavaScriptTypeScript

Mobile Development

React NativeExpoExpo RouterIgniteAmity

Frontend

Next.jsReact.jsTailwind CSSContext APIReduxRedux Toolkit

Backend & Database

Node.jsExpress.jsSupabasePostgreSQLMongoDBGraphQLAxiosREST APIs

Services & SDKs

RevenueCatFirebaseMixpanelMapboxn8nSocket.io

Testing

JestDetox

Tools & DevOps

GitGitHubGitLabBitbucketPostmanXCodeAndroid StudioVS CodeCursorJIRAConfluenceVercelApp Store ConnectGoogle Play Console
Career

Work Experience

Concept Recall

Current

React Native / MERN Stack Developer

Dec 2023 — Present

Karachi, Pakistan

  • Built 15+ production apps using React Native, Node.js, Express.js, MongoDB
  • Built Ancient Remedies — a wellness app with 500+ remedy recipes, AI chat, and RevenueCat subscription flows
  • Developed IIFYM App with GraphQL, multilingual support, and subscription management
  • Built Afrotech Connect with Amity SDK chats and Firebase notifications
  • Upgraded Harvest Engine from React Native v0.63 to v0.75.4 (New Architecture)
  • Developed M50 toll payment system with Payzone integration
  • Wrote Detox E2E test cases for WoddleBabyInc BLE connectivity features
  • Implemented Agile methodologies using JIRA, Confluence, and Git
React NativeExpoTypeScriptReduxSupabaseRevenueCatMixpanelNode.jsExpress.jsMongoDBPostgreSQL

Jobit Technologies

Front End Developer

Feb 2023 — Dec 2023

Remote

  • Developed and maintained React Native and Next.js apps for clients
  • Built responsive UIs using Tailwind CSS
  • Followed Agile methodologies for project delivery
Next.jsReact NativeTypeScriptTailwind CSS

SoftAppsio

Full Stack Developer

Jun 2022 — Dec 2022

Karachi, Pakistan

  • Built marketplace platform using MERN stack
  • Implemented HLS/DRM encrypted URL for secure media streaming
  • Integrated Socket.io for real-time features
Next.jsReact.jsReact NativeReduxTypeScriptNode.jsMongoDB

Panacloud Pvt Ltd

Full Stack Developer

Jun 2021 — Jun 2022

Karachi, Pakistan

  • Developed full-stack web apps using JavaScript, Node.js, Express.js, React
  • Designed responsive HTML email templates
  • Refactored codebases for performance and maintainability
React JSJavaScriptTypeScriptNode.jsExpress.js

Jawan Tech Pakistan

Frontend Intern (React JS)

Feb 2021 — May 2021

Karachi, Pakistan

  • Developed Quiz Application with React.js and Firebase
  • Created responsive web designs with HTML5, CSS3, ES6+
React JSJavaScriptFirebase
Portfolio

Featured Projects

Apps and systems I have built and shipped

Ancient Remedies

iOS + Android

Wellness app with 500+ remedy recipes, AI-powered chat, personalized meal plans, and premium subscriptions. Integrated Shopify book purchase → RevenueCat premium grant flow.

ExpoSupabaseRevenueCatMixpanelTypeScript
App StorePlay Store

Afrotech Connect

iOS + Android

Community platform with post creation, reactions, threaded comments, 1-to-1 and group chats with media sharing.

React NativeFirebaseAmity SDK
App StorePlay Store

WoddleBaby

iOS + Android

Bluetooth-connected baby care app with warming, noise machine, night light, growth tracking, and AI reminders.

React NativeBluetooth Low Energy (BLE)Detox
App StorePlay Store

Harvest Engine

iOS

Upgraded legacy farm management app from React Native v0.63 to v0.75.4 New Architecture. Maintained chemical tracking and compliance logs during migration.

React NativeNew ArchitectureCocoaPodsGradle
App Store

IIFYM App

iOS

Nutrition tracking app with customized meal plans, monthly subscriptions, pause/resume billing, and multilingual support (English + Arabic).

React NativeGraphQLRedux ToolkitTypeScript

M50 App

iOS + Android

End-to-end vehicle toll payment system with digital invoicing, Payzone gateway, prepaid/postpaid modes, and PDF export.

React NativeReduxPayzone Gateway
Services

What I Can Build For You

📱

Cross-Platform Mobile Apps

End-to-end iOS and Android apps using React Native and Expo. From architecture to App Store deployment.

  • ✓React Native & Expo
  • ✓iOS & Android
  • ✓App Store & Play Store
  • ✓Subscriptions & Payments (RevenueCat)
🌐

Web Apps & Platforms

Modern web applications with Next.js frontend and Supabase or Node.js/Express backend. Fast and scalable.

  • ✓Next.js & React
  • ✓Node.js & Express.js
  • ✓Supabase & MongoDB & PostgreSQL
  • ✓REST APIs & GraphQL
⚡

Workflow Automation

Business automation using n8n. WhatsApp bots, AI integrations, and custom workflows that save time.

  • ✓n8n Workflows
  • ✓WhatsApp Business API
  • ✓AI Integrations (Gemini, OpenAI)
  • ✓Google Sheets & Firebase sync
Testimonials

What Clients Say

Feedback from people I have worked with

“Usama delivered exceptional work on multiple web projects. He handled both the frontend and backend with great attention to detail, clean code, and timely delivery. Highly recommend him for full-stack web development.”

AM

Abdul Moeid

Client — Web Applications

“Working with Usama on our mobile app was a great experience. He understood our requirements quickly, delivered a polished iOS and Android app, and was very responsive throughout the entire process.”

MK

Muhammad Khurram

Client — Mobile Application

Contact

Let's Work Together

Have a project in mind? Send me a message and let's discuss how I can help.

📍

Location

Karachi, Pakistan

📧
⏰

Response

Within 24 hours

🌍

Availability

Open to remote worldwide

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