Looks like you have JavaScript disabled. For the full Twine experience, you will need to re-enable it.

I am an innovative and results-driven Flutter Developer with over 5 years of experience in mobile app development, specializing in cross-platform solutions for iOS and Android. I have a proven track record in building scalable, user-centric applications, integrating APIs, and optimizing UI/UX for seamless experiences. I have successfully led technical teams and deployed apps to both the App Store and Google Play. I thrive in agile, remote environments and excel at collaborating with cross-functional teams to deliver high-performance solutions.…I am an innovative and results-driven Flutter Developer with over 5 years of experience in mobile app development, specializing in cross-platform solutions for iOS and Android. I have a proven track record in building scalable, user-centric applications, integrating APIs, and optimizing UI/UX for seamless experiences. I have successfully led technical teams and deployed apps to both the App Store and Google Play. I thrive in agile, remote environments and excel at collaborating with cross-functional teams to deliver high-performance solutions.

CHUKWU ONYEKACHI HUMPHREY

App Developer, Developer, Programmer, +2





I am an innovative and results-driven Flutter Developer with over 5 years of experience in mobile app development, specializing in cross-platform solutions for iOS and Android. I have a proven track record in building scalable, user-centric applications, integrating APIs, and optimizing UI/UX for seamless experiences. I have successfully led technical teams and deployed apps to both the App Store and Google Play. I thrive in agile, remote environments and excel at collaborating with cross-functional teams to deliver high-performance solutions.…I am an innovative and results-driven Flutter Developer with over 5 years of experience in mobile app development, specializing in cross-platform solutions for iOS and Android. I have a proven track record in building scalable, user-centric applications, integrating APIs, and optimizing UI/UX for seamless experiences. I have successfully led technical teams and deployed apps to both the App Store and Google Play. I thrive in agile, remote environments and excel at collaborating with cross-functional teams to deliver high-performance solutions.

Available to hire

I am an innovative and results-driven Flutter Developer with over 5 years of experience in mobile app development, specializing in cross-platform solutions for iOS and Android. I have a proven track record in building scalable, user-centric applications, integrating APIs, and optimizing UI/UX for seamless experiences.

I have successfully led technical teams and deployed apps to both the App Store and Google Play. I thrive in agile, remote environments and excel at collaborating with cross-functional teams to deliver high-performance solutions.

Skills

Experience Level

Expert

Expert

Expert

Intermediate

Intermediate

Intermediate

Intermediate

Intermediate

Intermediate

Intermediate

Intermediate

Intermediate

Language

English

Fluent

Work Experience

Chief Technical Officer at Grascope Industries LTD

February 1, 2025 - Present

Lead technical strategy, refactored codebases to align with industry best practices and clean architecture standards. Transformed Figma designs into responsive UI implementations with pixel-perfect accuracy. Integrated third-party APIs and payment systems such as Stripe and PayStack to ensure seamless functionality. Deployed the Haulway app to App Store and Google Play, collaborating with Backend and UI/UX teams in an Agile environment. Maintained comprehensive code documentation and delivered rapid updates to meet project deadlines.

Co-Founder & CTO at Sendez

October 1, 2024 - Present

Spearheaded technology development by rebuilding Customer and Rider apps in Flutter within 3 months, now live on Google Play. Refactored codebase to MVVM architecture enhancing scalability and maintainability. Enabled API integrations with third-party businesses ensuring secure and efficient data exchange. Led research and adoption of cutting-edge technologies to advance platform capabilities.

Founder at Onyion

April 1, 2024 - Present

Developed a real-time social connection app using Flutter, prioritizing user privacy and security. Designed and prototyped UI/UX in Figma, launched on Google Play with App Store release in progress. Implemented Firebase for backend services and GitHub for version control to ensure robust app performance. Leveraged Google Analytics and PowerBI to analyze user behavior and optimize app features.

Flutter Developer at Freelance

April 1, 2020 - Present

Delivered complex UI designs including Kuda app clones showcasing expertise in responsive and modern interfaces. Built a volunteer app to connect users with mechanics nationwide leveraging location-based services. Developed a church app and iterated designs based on user feedback to improve performance and usability. Collaborated with Flutter developers, Figma designers, and project managers to deliver high-quality volunteer projects.

E-commerce/Digital Merchandising Manager at Sundry Markets Limited

April 30, 2024 - July 18, 2025

Co-created an e-commerce platform for Market Square integrating 29+ stores for a seamless online-offline experience. Acted as intermediate with developers to align platform features with business needs optimizing for speed and scalability. Analyzed data using Google Analytics and PowerBI improving customer performance by 30%. Implemented logistics strategies that reduced delivery times from next-day to 2-hour same-day delivery.