Open to opportunities

Don Mj

@donmj

Message

I build high-performance Flutter mobile apps with scalable architecture, payments, maps, and automated delivery.

United Kingdom

Message

What I'm looking for

I'm looking to build scalable, high-performance mobile products with cross-functional backend, design, and product teams, contributing to architecture, offline-first workflows, payments, maps, API reliability, and automated delivery.

I've led Flutter development for Mowo Africa, building a cross-platform marketplace with store creation, invoicing, payments, maps, and routing. I improved performance by 40%, routing accuracy by 35%, and deployment time by 90%.

At Carburant.io, I developed Flutter and Kotlin applications for fintech and utility products including Billing Plus, PerryPays, and Pay Bond, serving thousands of users. My work improved UI/UX performance by 40%, API reliability by 50%, and reduced app publishing time by 95% through Shorebird CI/CD automation.

I built CycleX and CycleX Agent from the ground up at Hndwok Global, owning architecture, UI, business logic, data structures, and release strategy. I also led a four-person team delivering AI-powered Flutter applications during Side Hustle 5.0.

I work across Flutter, Dart, React Native, Kotlin, Swift, REST APIs, offline-first workflows, state management, and CI/CD to deliver reliable Android, iOS, and web applications.

Experience

Work history, roles, and key accomplishments

Senior Flutter Developer

Mowo Africa

Oct 2024 - Jul 2026 (1 year 9 months)

Led development of a cross-platform marketplace with payments, maps, and routing, improving performance by 40% and deployment time by 90%. Designed Flutter architecture, navigation, and reusable UI for Android, iOS, and Web.