Skip to main content
Hi, I'm Winfred.

Architecting High-Performance Frontends.

Frontend Engineer crafting immersive digital experiences.

Based in Nairobi · Available for work

About Me

I Deliver Exceptional User Experiences Across Various Platforms. 

Winfred Kagendo

As a Frontend Engineer with four years of experience, I've consistently poured my heart and soul into creating products that not only look great but feel amazing to use. Currently, I work as a Senior Engineer crafting immersive digital experiences. 

Learn More

Experience

Frontend & Mobile Engineer

Supernomics

Jan 2026 – Present
  • Worked with monorepos to build scalable AI systems. 
  • Created a mobile app using Expo and React Native. 
  • Built a component library to improve developer experience. 
  • Translated Figma designs for web and mobile and integrated APIs. 
React.jsReact NativeTailwind CSSExpoMonorepos
Mobile Engineer

Nesti

Aug 2025 – Jan 2026
  • Pixel-perfect Figma to UI conversion across the product. 
  • Created a full Alipay mini app shipped to production. 
  • Seamless API integration across the mobile product. 
React NativeAlipay Mini AppFigmaAPI Integration
Frontend Engineer

Leja

Jul 2024 – Oct 2025
  • Improved retention with faster load times via SSR (Next.js). 
  • Drove sales growth by building a Safaricom mini app with Ant Design Mini and API integrations. 
  • Increased engagement by turning Figma designs into clean, responsive UIs (React, MUI). 
  • Secured platforms with best-practice frontend security (XSS, CSRF protection). 
  • Boosted SEO performance through server-side rendering and optimized metadata. 
React.jsNext.jsMUIAnt DesignSEO
Frontend Engineer

Oaknet Business

2023 – 2024
  • Transformed designs into dynamic UIs with JavaScript and React JS workflows. 
  • Led UI development for a SaaS M&E system, collaborating with backend teams. 
  • Enhanced user experience in an investment appraisal system. 
  • Spearheaded UI creation using Vue3.js, delivering visually engaging designs. 
  • Optimized state management with Pinia and API integration via GraphQL. 
Vue3.jsPiniaGraphQLJavaScript
Frontend Developer

Pathology Network

May 2023 – May 2024
  • Translated Figma designs to seamless apps using React.js, TailwindCSS, and Material UI. 
  • Reduced dev time by 30% and boosted team efficiency by 20% through reusable components. 
  • Leveraged React tools to enhance app speed, scalability, and security. 
  • Streamlined Agile workflows, ensuring timely delivery of high-quality features. 
  • Worked closely with cross-functional teams to achieve project goals. 
React.jsTailwindCSSReact QueryMaterial UI
Category: Engineering

System Design & Web Performance

Striking the balance between speed and engineering tradeoffs — how architectural decisions shape the user experience at scale.

8 min read

Topics

  • Frontend
  • React
  • UX Design
  • Performance
  • Mental Health
  • JavaScript
  • Career
  • Engineering
View all on Medium