Eric Onyeulo

Senior Mobile Engineer | Flutter - 6+ years

Professional Summary

Led teams building 20+ Flutter apps with 4.5★+ ratings, 100K+ users, and 3+ funded startups — now bringing that fire to your team. I deliver robust, scalable, high-quality applications to A-level clients and global companies across E-commerce, Banking, Automotive, Social Network, Healthcare and Dispatch industries.

Featured Apps

Fiber - Inventory. Sales. Receipts.

Trugo - Electric Vehicle Charging

Technical Skills

Programming Languages

Dart (Flutter), Kotlin/Java (Android), Swift/Objective-C (iOS), JavaScript (Web)

Flutter Expertise

State Management: Bloc, Riverpod, Provider, RxDart
UI/UX: Canvas & Animations, Responsive Layouts, Dynamic Themes, Localization & Internationalization
Integrations: AI Models, Payment & In-App Purchases, Notifications, Deep Links
Development: Platform Channels, Custom Plugins & Packages

Native Development (Android & iOS)

Android: Jetpack & Compose, Coroutines, Retrofit, Dagger/Hilt
iOS: SwiftUI, UIKit, Combine, Xcode Instruments
Platform Integration: Native SDK bridging, Services, Platform Views

Architecture & Backend

Architectures: Clean Architecture, MVVM, Test-Driven Development (TDD), SOLID Principles
APIs & Backend: REST, WebSockets, GraphQL, Firebase, Supabase, Google Cloud
Testing & Debugging: Unit, Widget/UI, Integration, End-to-End Tests, Crashlytics/Amplitude
Tools: CI/CD & DevOps, DevTools, Code Generation, Linting & Static Anaylsis

Technical & Project Skills

Team Leadership & Mentorship, Agile/Scrum, Technical Documentation
Team Collaboration, Feature Ownership, Code Reviews, Pair Programming, A/B Testing
Technical Decision-Making, Stakeholder Communication, Project Migration

Work Experience

Senior Flutter Developer

Y-Queue? – Food Delivery | Contract | Nigeria Nov 2024 – Apr 2025
  • Led end-to-end development of the Y-Queue? mobile app (Play Store & App Store), achieving a 4.7★ rating from 5,000+ active users
  • Pioneered the first-ever Android Instant App & iOS App Clip built with Flutter

Technologies: Flutter, TDD, Kotlin, Swift, Objective-C, Instant Apps, App Clips, Firebase, DevTools, CI/CD (Fastlane)

Lead Mobile Developer

Kurero (raised $1.2M) – Voice-Powered Social Network | United Kingdom May 2023 – Dec 2024
  • Led and mentored a team of 9 engineers to build a voice-first social platform, in under 8 weeks
  • Saved the company $50,000+/year from external tools and API costs, by architecting in-house versions, including our deferred deep linking system
  • Owned and Delivered robust features such as offline mode, AI assistance, smart notifications, subscriptions, real-time chat & calls, and audio management within aggressive timelines

Technologies: Flutter, REST, FCM, Agora, Stripe, GetX, CI/CD, Crashlytics, Code Reviews, Pair Programming

Senior Flutter Developer

Smart.iX (consultancy for Porsche, VW, Togg) – I.T. Services | Germany Mar 2022 – Feb 2023
  • Led development of Tru.Store and SmartLiving carapps, contributing to a €3M acquisition deal with Togg
  • Integrated Flutter modules into automotive apps, pushing boundaries in in-vehicle UX and infotainment
  • Developed SmartLiving – a real-time IoT car/mobile app using gRPC, achieving ~60ms response time for critical safety features
  • Delivered apps for Togg, Porsche, and Volkswagen, including cross-platform solutions

Technologies: Flutter, Bloc, RxDart, gRPC, Kotlin, Java, AAOS, IoT, CI/CD, Code Reviews, Documentation

Senior Flutter Developer

Rézme (sold 20% of company) – Career Management | United States Aug 2019 – Apr 2022
  • Rebuilt the Jobseeker MVP into a production-grade v1, driving a 20% company acquisition and earning promotion to Lead Developer
  • Architected and delivered Rézme 2.0 using Clean Architecture, enabling the app to scale to 100K+ active users
  • Established CI/CD pipelines and comprehensive tests, reducing release time from 24 hours to 30 minutes and improving release confidence

Technologies: Flutter, Riverpod, Firebase, MLKit, Clean Architecture, Agile, Automated Testing

Education

Bachelor of Science, Computer Science

University of Nigeria

August 2018 – April 2021