ENGINEERING
EXCELLENCE
Software Engineer
Hi, I’m Ephraim Umunnakwe, but most people know me as King Raym. I’m a Mobile developer from Nigeria, passionate about turning ideas into beautiful, functional apps. Through Raym Universe, I bring creativity and precision together to build digital experiences that inspire, solve problems, and stand out.
Core
Stack
Merging technical engineering with high-end aesthetic form.
Mobile Systems
Engineered cross-platform mobile environments using Industry-Standard tools and architectural design patterns.
Performance
Precision-tuned applications for sub-second latency and zero-waste resource usage.
Digital Form
Next.js and React architectures with a focus on Swiss-style visual systems.
Cloud Infrastructure
Distributed backend systems and real-time database architectures at global scale.
Portfolio
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Mr Good
Mr Good App is a Flutter-based cross-platform application built for iOS, Android, Web, and Windows. Highlights: - Clean architecture with feature-first structure and separation of concerns - BLoC state management across auth, profile, cart, checkout, payment, dashboard, search, wallet, reviews, orders, and business profile - Multi-flavor support: development, staging, production - Firebase integration including messaging - Secure storage plus shared preferences for persistent data - Google Sign-In and Apple Sign-In support - Geolocation and mapping support via geolocator, geocoding, and flutter_map - Adaptive UI with screen size responsiveness using flutter_screenutil - Theming through centralized app theme management and dynamic business profile colors - Localization-ready with ARB-based translations and generated l10n support - Global snackbar system, custom routing with GoRouter, and dependency injection Tech stack: - Flutter 3.41 / Dart 3.11 - bloc / flutter_bloc / equatable - dio for API communication - go_router for navigation - firebase_core, firebase_messaging - flutter_local_notifications, url_launcher, webview_flutter - hugeicons, flutter_svg, lottie, flutter_staggered_grid_view Quality and tooling: - Built with Very Good CLI conventions - Uses very_good_analysis, bloc_lint, bloc_test, mocktail - Structured for test-driven development and maintainability
Mims Kitchen
Engineered for speed and scalability, Mims Kitchen is a robust, cross-platform food delivery application built with Flutter. It utilizes a clean, feature-driven architecture powered by Riverpod for state management and GoRouter for seamless navigation. Key technical highlights include a dynamic shopping cart system, secure user authentication, real-time push notifications, and a proprietary in-app digital wallet for seamless financial transactions. It's a complete, end-to-end solution blending beautiful UI with complex, stateful business logic.
Ahiaoma
Ahiaoma is a production-ready marketplace built for speed, reliability, and scale. (Contact me for Demo) Features and Perks: - Responsive product catalog, high‑performance image grids, category browsing, search, and price filtering. - Clean Architecture, modular UI, Provider state management, multi‑environment configs, secure local storage. - Supabase authentication and user profiles. - Granular Notification handling and deep‑link–ready taps. - Role‑based dashboard and controls. - Robust error handling, smooth scrolling, offline‑friendly UX.
Network
"I hired Ephraim U. as a Flutter developer and CTO to help in building our company mobile application. He was responsible for writing the code from scratch to launching the finished product."
Mba A.
CEO @Ahiaoma
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