Open to opportunities

winnie kagendo

@winniekagendo

Message

I build high-performance React products for fintech, healthcare, and AI workflows.

Kenya

Message

What I'm looking for

I'm looking to build secure, accessible, high-performance web and mobile products, especially in AI, fintech, healthcare, or SaaS. I value ownership from architecture through production, close collaboration with product and backend teams, and opportunities to mentor engineers.

I've delivered customer-facing web and mobile products at SuperNomics, Nesti, Leja Limited, and The Pathology Network, spanning AI legal workflows, Safaricom Mini Apps, USSD loan journeys, rental payments, and clinical operations. At Leja, I improved application load performance by 70% and helped increase loan uptake by 15% through Django-powered USSD onboarding and repayment flows.

I build accessible React, Next.js, TypeScript, and React Native interfaces with reusable design systems, secure authorization, and reliable API integrations. I also mentor junior engineers, lead reviews and architecture discussions, and optimize products for constrained devices, low-connectivity users, and data-heavy operational workflows.

Experience

Work history, roles, and key accomplishments

Current

Frontend & Mobile Engineer

Current

SuperNomics

Jan 2026 - Present (7 months)

Owned React frontend architecture for an AI streaming service across multiple surfaces, modeled asynchronous states, and delivered subscription and seat-management workflows with Stripe Connect.

React TypeScript Next.js Electron API Integration Async States Responsive Design Accessibility

Current

Senior Fullstack Developer

Current

Freelance

Oct 2020 - Present (5 years 10 months)

Delivered responsive web and mobile products for startups, architected React and Next.js applications in monorepos, and reduced deployment time by 40% with GitHub Actions.

React Next.js TypeScript TurboRepo GitHub Actions Jest React Testing Library Performance Optimization React Native Expo

Mobile Engineer

Nesti

Aug 2025 - Jan 2026 (5 months)

Designed and shipped a Safaricom Mini App and a React Native rental-payment application, improving load performance by 25% on low-end devices and integrating push notifications, camera, and geolocation.

React Native Expo Ant Design Mini REST GraphQL Performance Optimization Push Notifications Geolocation

Frontend Engineer

Leja Limited

Jun 2024 - Oct 2025 (1 year 4 months)

Improved Core Web Vitals by 70% using Next.js optimizations, led frontend delivery of a Safaricom Mini App, and shipped Django-powered USSD flows that increased loan uptake by 15%.

React Next.js TypeScript TanStack Table Redux toolkit Axios React Query Django Performance Optimization SEO Security Design Systems

Frontend Engineer

The Pathology Network

Jun 2023 - May 2024 (11 months)

Built responsive clinical interfaces, abstracted frontend authorization across roles, and created a reusable component library that improved delivery velocity by 30%.

React TanStack Table Authorization Component Libraries Design Tokens Performance Optimization

Frontend Developer

Oaknet Business Limited

Jan 2022 - Mar 2023 (1 year 2 months)

Owned UI/UX and frontend delivery across products including a multi-tenant M&E platform and an investment platform, implementing authorization and anonymity-preserving workflows.