Open to opportunities

Eli Castellano

@elicastellano

Message

Frontend developer building scalable, user-centric web apps with React, TypeScript, and modern tooling.

Argentina

Message

What I'm looking for

I seek frontend or full-stack roles where I can build user-centric, testable web products, improve developer workflows, and scale component-driven UIs.

I am a frontend-focused developer with 3+ years building user-centric products using React, React Native, Next.js, TypeScript and NodeJS. I specialize in creating performant, accessible interfaces and reusable component libraries that standardize UI/UX across teams.

At Insightt I engineered a web-based ERP for the car repossession industry, led a reusable component library using React, TypeScript, Storybook and Material UI, and implemented a Stripe integration that achieved 95% unit test coverage and reduced payment-related support tickets by 80%.

I value testing, trunk-based development, and developer experience; I enjoy improving team efficiency with monorepos, feature flags, and clear CI workflows while delivering reliable end-to-end features.

Experience

Work history, roles, and key accomplishments

Current

Full Stack Developer

Current

Insightt

Feb 2024 - Present (2 years 4 months)

Engineered and maintained a web-based ERP for the car repossession industry, built a reusable React+TypeScript component library and delivered end-to-end features including a Stripe billing integration that reduced payment-related support tickets by 80% and achieved 95% unit test coverage.

React TypeScript GraphQL Storybook Material UI Stripe Trunk Based Development

Frontend Developer

Launchy

Apr 2022 - Jan 2023 (9 months)

Managed full-cycle website development, maintenance and performance optimization for e-commerce and small businesses, delivering pixel-perfect React/Next.js implementations faithful to Figma designs and improving cross-device responsiveness.