Open to opportunities

Matias Gerstner

@matiasgerstner

Message

I build scalable, accessible React applications and accelerate delivery with AI-assisted development.

Argentina

Message

What I'm looking for

I'm looking for remote or hybrid opportunities where I can build scalable, accessible React applications, improve performance and quality, mentor developers, and apply AI-assisted workflows in collaborative Agile teams.

At Wemox, I architect scalable React 18 and TypeScript applications, cutting page load times by 20–30% through code splitting, lazy loading, and Web Vitals optimization. I also introduced Claude and GitHub Copilot workflows to speed feature delivery and code reviews.

Previously at Quorum ITeam, I modernized a legacy application into a React and TypeScript architecture, migrated state management from Redux to Zustand, and reduced production bundle size by 35%. I build accessible interfaces aligned with WCAG 2.1 and strengthen quality through Jest, React Testing Library, Cypress, and Playwright.

Across freelance and product work, I’ve delivered 10+ web applications, MERN e-commerce platforms, React Native experiences, dashboards, and AI-powered product recommendations and chatbots. I enjoy mentoring developers, collaborating across design and engineering, and building reusable component systems that improve usability and delivery speed.

Experience

Work history, roles, and key accomplishments

Current

Senior Frontend Developer

Current

Wemox

Nov 2025 - Present (9 months)

Architect and develop scalable frontend applications using React 18 and TypeScript, following Clean Architecture and SOLID principles. Reduced page load times by 20-30% through code splitting, lazy loading, and Web Vitals optimization.

React TypeScript Clean Architecture SOLID Principles Lazy Loading Claude AI assisted Development

Current

Freelance Web Developer

Current

Self-employed

Jul 2018 - Present (8 years 1 month)

Delivered 10+ web applications for clients across the United States, Mexico, Peru, and Argentina, covering frontend development, UX/UI design, and project management. Built a location-based platform using React and an e-commerce application on the MERN stack.

React MERN Stack UX UI Design Project Management OpenAI API

Frontend Developer

High Impact

Dec 2024 - Nov 2025 (11 months)

Built responsive, accessible user interfaces with React, Tailwind CSS, and modern CSS features. Set up fast, iterative development workflows with Vite and React Fast Refresh, reducing local iteration time and improving developer experience.

React Tailwind CSS Modules SASS Vite React Fast Refresh Claude AI Code Review Design Systems

React Developer

Quorum ITeam

Jan 2022 - Dec 2024 (2 years 11 months)

Refactored a legacy codebase to a modern React/TypeScript architecture, improving maintainability and developer velocity. Migrated state management from Redux to Zustand, reducing boilerplate and simplifying data flow across the application.

React TypeScript Redux Zustand Tree Shaking Jest React Testing Library

Frontend Developer

Zarego

Jan 2021 - Oct 2021 (9 months)

Developed cross-platform applications using React and React Native for web and mobile. Integrated third-party APIs for maps, analytics, and payment processing into production applications.

React React Native Usability

Full Stack Developer

Reputación Digital

Jun 2020 - Jun 2021 (1 year)

Developed MERN stack applications for social media monitoring and marketing automation. Built custom ELK Stack dashboards for real-time data visualization and reporting.

MERN Stack Elasticsearch Logstash Kibana Data Visualization