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I will mobile app development android app ios flutter react native fintech app creation
Usman Sarwar
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About this gig
Are you looking for a senior React Native developer who can build your complete iOS & Android app?
I'm Usman Sarwar, a full-stack mobile app developer with 7+ years of production experience.
What I Do Best
- Full-stack React Native development
- iOS & Android single codebase, both stores
- Fintech, payments & real-time app flows
- AI-assisted development for faster delivery
UI/UX & Frontend
- Clean, intuitive interfaces users actually enjoy
Backend & Integrations
- REST API & GraphQL integration
- Firebase, Firestore & real-time databases
- Stripe & payment gateway integration
- Third-party SDK & API integration
Services I Offer
- Complete iOS & Android app development
- Frontend + backend full-stack solutions
- App UI/UX design & prototyping
- App modernization & redesign
- Bug fixing, maintenance & performance tuning
- Mobile Development
- Flutter Apps
- React Native
- Fintech Apps
Apps I've worked on:
- Chat
- Dating
- Delivery
- Shopping
- Taxi
- Booking
- Social networking
- Entertainment
- Medical
- Health & fitness
- custom app
My goal isn't just to write code it's to deliver a working product that supports your businessHigh-quality work at a competitive starting price as I expand my Fiverr presence.
lets start!
Get to know Usman Sarwar
Usman Sarwar
Lead Mobile App Engineer
- FromPakistan
- Member sinceApr 2026
- Avg. response time1 hour
Languages
English, German
I am Usman Sarwar—a software engineer and mobile application developer with 7+ years building large-scale, SaaS-style products. I am especially strong in React Native (iOS & Android), with deep work in payments, fintech flows, PAX / POS hardware, and real-time systems (MQTT, sockets). I also ship web stacks where the product needs them, and I use AI-assisted engineering thoughtfully—agents, LLMs, and modern tooling—with review, security, and maintainability.
My Portfolio
FAQ
Do you offer support after delivery?
Yes, I provide post-delivery support for bug fixes, improvements
Can you work with my existing design or app?
Yes, I can work with your existing UI/UX designs, improve current apps.
How do I get started with your services?
To begin, simply click on 'Contact Me' or 'Request to Order' and share your project details. We'll take it from there!
Can you add AI features to my mobile app?
Yes. I offer custom mobile app development with AI integrations like chatbots, smart search, image recognition, and automated workflows.
What if I don't know the requirements for my project?
If you're unsure about your project's requirements, we can initiate a discovery phase. During this phase, we'll work closely with you to identify your needs, goals, and specifications.
How do you ensure the quality of your work?
Our team consists of seasoned professionals with years of experience. We follow industry best practices, conduct thorough testing.
How long does it typically take to complete a project?
Project timelines vary depending on complexity.
Do you integrate APIs, payments, and third-party services?
Yes, I integrate REST APIs, payment gateways, authentication systems, and third-party services as required.
