Open to opportunities

Dennis Belio

@dennisbelio

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Full-stack software engineer building secure, scalable products with Node.js, React, and modern DevOps.

Kenya

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What I'm looking for

I’m looking for a team where I can build secure, scalable products end-to-end—strong auth, payments, and APIs—while owning CI/CD and performance. I want Agile delivery, code quality, and a culture that embraces AI-assisted development.

I’m a Software Engineer with 4+ years of experience designing, building, and deploying scalable, secure software systems across e-commerce, fintech, and enterprise domains. I specialize in authentication and authorization (JWT, Google OAuth 2.0, 2FA, RBAC), REST APIs and GraphQL, and payment integrations including M-Pesa (STK Push), Paystack, and PesaPal.

I bring strong frontend and performance skills (React/Next.js and state management with TanStack Query and Zustand), plus DevOps practices like Docker, CI/CD (GitHub Actions), and cloud deployments. I aim to deliver reliable products through testing (Cypress, Jest), structured validation (Zod), and fast iteration using AI tools like Cursor, Copilot, and Claude—without compromising code quality.

Experience

Work history, roles, and key accomplishments

Full Stack Developer

Turi Events

Oct 2025 - Dec 2025 (2 months)

Architected and built an event management platform from scratch, integrating PesaPal payments and delivering an API with Node.js, Express, TypeScript, and Zod type-safe validation that reduced runtime validation errors by 30%. Implemented CI/CD and deployed frontend to Netlify and backend to Render, achieving 99% uptime and improving performance (25% faster loads) and SEO visibility (15% increase