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Nelson Xavier Zambrano Sanabria

@nelxaz

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Senior frontend-focused software engineer specializing in React and TypeScript for scalable B2B SaaS.

Colombia

Message

What I'm looking for

I seek frontend-focused roles building scalable B2B products where I can improve developer experience, modernize codebases, mentor engineers, and drive reliable delivery.

I am a Senior Software Engineer with over 8 years of experience specializing in frontend development using React and TypeScript, focused on scalable B2B SaaS products, developer experience, and sustainable frontend architecture. I have led high-impact initiatives including migrations (linters, bundlers, test runners), modernizing legacy codebases, and improving CI/CD and local development performance while maintaining a low Change Failure Rate.

At Apploi I implemented production features, contributed to an internal design system, defined testing strategies targeting 60–80% coverage, and mentored junior engineers. Previously at Feedback Software I built React Native mobile features, owned iOS/Android release processes, and collaborated across small teams with backend services.

Experience

Work history, roles, and key accomplishments

Current

Senior Software Engineer

Current

Apploi

Jan 2020 - Present (6 years 1 month)

Led frontend work on a large B2B SaaS healthcare workforce platform, implementing a document-signing feature, reducing pre-commit hook time via linter migration, and maintaining a Change Failure Rate below 1%. Drove bundler and test-runner migrations and contributed to an internal design system to improve developer experience and build performance.

React TypeScript Vite Vitest React Query CI CD

Frontend Engineer

Feedback Software

Jan 2017 - Dec 2020 (3 years 11 months)

Implemented features for a React Native social app, owned iOS/Android release processes, and supported a React web client while integrating with REST backend services. Transitioned from part-time to full-time and delivered end-to-end feature lifecycles within a small team.