Open to opportunities

Jimkelly Nzioka

@jimkellynzioka

Mobile developer and founder shipping production-grade Flutter apps with end-to-end ownership and cross-platform impact.

Kenya

Message

What I'm looking for

I’m looking for a role where I can own the full mobile build—Flutter UI and state management, API integration, and deployment—while collaborating with remote teams to ship reliable product improvements on schedule.

I’m a mobile developer with four years of professional experience building production-grade cross-platform Flutter applications for European and Kenyan markets. I founded Halvari Technologies, taking a full Flutter and Dart property listings app from concept to shipped product, and I enjoy owning the work end-to-end.

I architect apps with Riverpod and GoRouter, build rich UI experiences (including custom drawing with CustomPainter), and integrate real-world services like Mapbox, authentication, real-time data, and push notifications (FCM). Previously, I co-founded DeTrip and led mobile development at MobiFi, and I’ve also been recognized at ETHGlobal Brussels for “Most Creative Use Case” and “Best zkdApp.”

Experience

Work history, roles, and key accomplishments

Current

Founder and Lead Developer

Current

Halvari Technologies Limited

Apr 2025 - Present (1 year 3 months)

Founded Halvari Technologies and built a Kenyan property listings app using Flutter and Dart, covering the full mobile stack from UI to deployment. Implemented Riverpod state management, GoRouter navigation, SQLite drafts, Mapbox maps, and integrated Supabase/PostgreSQL for authentication, realtime data, FCM push notifications, and REST API consumption; also built the companion Next.js web platfor

Flutter Dart GoRouter CustomPainter Mapbox SQLite Supabase PostgreSQL Authentication REST APIs Next.js

Co-founder and Frontend Developer

DeTrip Netherlands

Jul 2024 - Mar 2025 (8 months)

Co-founded DeTrip and built a hotel booking web application from scratch using React and Next.js. Integrated backend services and used Firebase and Google Analytics to track and improve product performance while collaborating with designers and stakeholders across time zones.

React Next.js Firebase Backend Services Google Analytics

Frontend and Mobile Developer

MobiFi Netherlands

Mar 2022 - Jun 2024 (2 years 3 months)

Led mobile development of a Flutter parking services app for a European user base, integrating RESTful APIs and designing core data models. Used Firebase for authentication, real-time data, and cloud functions, and collaborated in a cross-functional remote team to ship features on schedule.

Flutter Dart RESTful APIs Data Modeling Firebase Authentication Cloud Functions