Hello!

I'm Timothy T.,
Senior Mobile App Developer

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Senior Mobile App Developer with 8+ years of experience delivering high-performance native and cross-platform mobile applications for startups and enterprises worldwide. Specialized in Flutter, Kotlin, React Native, and Swift

UPWORK

TOP RATED

Portfolio ↗Hire me

About Me

Throughout my career, I've helped startups and enterprises turn their ideas into scalable, user-centric mobile products. Whether it's a cross-platform app with Flutter or React Native, or a native experience with Kotlin or Swift — I deliver clean code, smooth performance, and pixel-perfect interfaces.

Custom Mobile App Development

Secure Database Management

API Design & Integration

Modern UI/UX Design

Deployment, Maintenance &
Post-Launch Support

View CV

My Portfolio

I specialize in building high-performance mobile applications that are fast, scalable, and user-focused. With 8+ years of experience in Flutter, Kotlin, React Native, and Swift, I transform ideas into polished iOS and Android apps. From sleek UI/UX design to clean code and seamless backend integration — I deliver solutions that not only function flawlessly but also create meaningful user experiences.

Habit Tracking App

Canrover

Horse Tips International

Senior Mobile App Developer with 8+ years of experience building high-performance iOS and Android apps. Specialized in Flutter, Kotlin, React Native, and Swift. 50+ apps launched on App Store & Google Play.

Mobile App Development

Database Management

API Design & Integration

Global Zair Guide

Global Zair Guide is a cross-platform mobile app built with React Native, offering users seamless access to curated content and essential tools for global guidance and learning. Now live on the Google Play Store

Hype Live

Hype Live is a cross-platform mobile app built with React Native that helps users take control of their personal finances. From expense tracking to budget planning — it delivers a smooth, intuitive experience on both iOS and Android

RIZQ App

RIZQ APP is a personal finance app built with React Native, helping users track daily expenses and manage needs efficiently. Fully cross-platform — optimized for iOS & Android

Testimonials That

Speak to My Results

Working with Timothy was a game-changer for our mobile app. He understood our vision perfectly and delivered a high-performance Flutter app that our users love. His communication, technical expertise, and post-launch support were exceptional

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Sarah Johnson

CEO, TechFlow

Timothy transformed our MVP into a fully functional Flutter app in just 3 months. His code quality, communication, and problem-solving skills are exceptional. He even suggested improvements we hadn't considered. Will definitely hire him again.

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Michael Chen

CTO, Basket

One of the best mobile developers I've worked with on Upwork. Timothy delivered a high-performance Kotlin app with clean architecture and thorough documentation. The app has been running smoothly with zero crashes since launch.

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Emily Rodriguez

Product Manager, Food Box

Timothy is a rare find — a developer who truly understands UI/UX. He built our React Native app and the user experience is flawless. His attention to detail and post-launch support went above and beyond.

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David Kim

Founder, HealthPlus

We needed a complex iOS app with real-time features. Timothy delivered a Swift masterpiece. He integrated Firebase, payment gateways, and push notifications seamlessly. Our users love it!

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Jessica Williams

Director, EduApp

Timothy helped us launch our Flutter app on both app stores within budget and ahead of schedule. His expertise in cross-platform development saved us 40% of development costs. Highly recommended!

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Robert Taylor

CEO, FinSecure

Security was our top priority for this banking app. Timothy's Kotlin expertise and secure coding practices gave us confidence. The app passed all security audits and has been downloaded over 10K times.

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Amanda Lee

Co-Founder, StyleBox

Timothy didn't just write code — he became a trusted partner. He guided us through the entire app development lifecycle from ideation to App Store submission. His React Native skills are top-tier.

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James Wilson

VP of Engineering, TravelEase

We hired Timothy to fix a buggy legacy app. He completely rebuilt it with Flutter and improved performance by 60%. His debugging skills and code optimization are impressive.

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Olivia Martinez

Founder, FitTrack

Working with Timothy was effortless. He understood our requirements immediately and delivered a polished iOS app that users rave about. His post-launch support has been outstanding — always responsive within hours.

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Daniel Brown

CEO, RealtyHub

Timothy built us a cross-platform real estate app with offline capabilities. His expertise in both Flutter and backend integration (Node.js, MongoDB) made the project seamless. 5-star experience all the way.

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