kelvinportuphy.com

Hello. I'm Kelvin Portuphy.

I design and developweb & mobile applicationsweb & mobile applications.apps.web & mobile applications.apps.

Works

Experiences

  • Marygold & Co. (US & UK)
    Senior Front-end Developer (Mobile)
    Mar 2022 - Feb 2025

    • Enhanced React Native app performance by identifying and resolving critical issues, reducing load times, and optimizing user interactions for a seamless experience.
    • Developed an internal tool to streamline documentation for client-owned code, integrating interactive design guidelines and testable React Native components.
    • Engineered highly complex React Native applications for both US and UK markets, efficiently handling vast amounts of data and implementing intricate business logic.
    • Integrated multiple third-party services to extend app functionality, ensuring seamless interaction with APIs, authentication systems, and business-critical tools.
    • Designed and built reusable, scalable React Native components for a multinational client, maintaining code consistency and improving maintainability across platforms.
    • Delivered high-performance, cross-platform mobile applications optimized for various smartphones, ensuring smooth operation across iOS and Android devices.
    • Created engaging and complex animations using Reanimated and Gesture Handler, enhancing user experience with fluid transitions and interactive elements.

  • Stanbic Bank Ghana
    Front-end Developer
    Sep 2020 - Apr 2022

    • Built and managed 20+ Angular applications, all developed using TypeScript, ensuring scalability, high performance, and clean, maintainable code.
    • Implemented a design system that run throughout the organization, ensuring consistency and accessibility across projects.

  • Bsystems Limited
    Intern
    May 2019 - Jul 2020

    • Facilitated cross-platform code execution using CodenameOne (https://www.codenameone.com/).

Tools

  • NEXTjs
  • React
  • Supabase
  • React-Native
  • Astro
  • NodeJS
  • Figma
  • TailwindCSS
  • Vite
  • CSS
  • HTML
  • TypeScript

About Me

I’m a passionate and ambitious developer with a love for React, React Native, mobile apps, and building systems that are truly ready for the real world.

I’m always exploring new ways to make workflows smoother, automate deployments, and set projects up to scale. I enjoy blending creativity with precision, whether I’m designing a UI, building an admin dashboard, or refining business logic, I like making things both functional and polished. I’m naturally curious, proactive, and not afraid to dive into new tools, libraries, or even server setups to get the job done.

I work with businesses to create user experiences that give them a real edge.

Outside of coding, I’m drawn to all things artistic and engineering, anything that lets me build, create, or experiment.

Contact Me

Let's get in touch

Feel free to contact me. I try to reach back to you soon.

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