m
man639

Denis K

@man639

Senior React Native Developer, Mobile App Developer, Software Developer

Kenya
English, Swahili
About me
I’m a mobile app developer specializing in building smooth and scalable apps for iOS and Android using React Native and Expo. I focus on clean UI, responsive performance, and great user experience. I also build admin panels using React, Node.js, Next.js, Express, and TypeScript to support backend workflows. From concept to deployment, I deliver reliable, maintainable solutions that fit business needs.... Read more

Skills

m
man639
Denis K
Offline • 

See my services

Mobile App Bug Fixes
I will fix bugs review code in your react native expo applications
From$15 / projectMore details
Mobile App Bug Fixes
I will upload android aab to google play and IOS ipa to app store
From$50 / projectMore details

Portfolio

Work experience

Lead Mobile Engineer

Company • Full-time

Oct 2025 - Present • 7 mos

Core Responsibilities Define mobile architecture (scalable, maintainable, secure) Lead development (iOS, Android, or cross-platform like React Native) Review code and enforce best practices Own app performance, stability, and release quality Collaborate with product, design, and backend teams Mentor engineers and unblock the team Technical Focus App architecture (MVVM, Clean Architecture) CI/CD, testing, and release pipelines Performance optimization (memory, rendering, network) Security (auth, data protection) API integration and offline strategies Leadership Role Set coding standards and workflows Break down features into deliverable tasks Drive technical decisions and trade-offs Ensure deadlines and quality are met