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Matheus Gentil

@matheusgentil

Senior Frontend Engineer & Architect | 9+ yrs React, TypeScript, Next.js | Design systems, micro-frontends, monorepos, AI-assisted dev

Portugal

Message

What I'm looking for

Senior/Staff Frontend or Product Engineer roles, remote (EU or US companies). I want to own frontend architecture end to end (design systems, monorepos, micro-frontends, performance) with React, TypeScript and Next.js, in product-led SaaS/B2B or dev-tools teams with a strong engineering culture and serious adoption of AI-assisted development.

Senior Frontend Engineer and Software Architect with 9+ years building large-scale web products with React, TypeScript and Next.js for enterprise clients in banking, fashion retail and telecom. I specialize in frontend architecture, design systems, monorepos (Turborepo), micro-frontends, test automation (Jest, Playwright) and AI-assisted engineering workflows with Claude Code and Cursor.

At CI&T, I act as frontend architect on enterprise client projects, owning frontend architecture and technical direction across React and TypeScript codebases. For a Swiss bank, I’m modernizing a legacy React application embedded in a Java platform, migrating it to a modern stack. I also built a telecom admin dashboard from scratch with Next.js, the latest React and a micro-frontend architecture.

I also set up Claude Code for the bank’s engineering team and trained developers to use it. For a global fashion retailer’s Sustainability platform, I built data-heavy dashboards and metrics views while maintaining 95% unit test coverage.

Previously at Metyis, I built features for a large-scale B2B fashion e-commerce platform, raised automated test coverage to about 70%, and reduced major production bugs to zero within six months. I’ve also built a reusable Storybook component library and led a migration of legacy JavaScript to TypeScript 5.

I’ve worked in English with distributed, international teams for 5+ years and I’m looking for remote Senior/Staff Frontend or Product Engineering roles.

Experience

Work history, roles, and key accomplishments

Current

Frontend Architect

Current

CI&T

May 2023 - Present (3 years 5 months)

Act as frontend architect on enterprise client projects, owning frontend architecture and technical direction across React and TypeScript codebases. Leading modernization of a legacy React application for a Swiss bank and building data-heavy dashboards for a global fashion retailer.

React TypeScript Shadcn Ui TanStack Table TanStack Form Zustand Zod Claude Code AI assisted Development Design Systems Storybook Webpack SSR Unit Testing Jest

Senior Frontend Developer

Metyis

Mar 2022 - May 2023 (1 year 2 months)

Designed and built new features for a global fashion group's large-scale B2B fashion e-commerce platform using React, TypeScript and GraphQL. Raised automated test coverage to ~70% and led the migration of legacy JavaScript code to TypeScript 5.

React TypeScript GraphQL Jest React Testing Library Storybook styled components TypeScript Migration

Front End Engineer

Turing.com

Jul 2021 - Apr 2022 (9 months)

Built frontend features for a Mexico-based payroll platform using React Hooks, styled-components and GraphQL. Worked fully remote with a distributed, cross-timezone team through Turing's vetted engineering network.

React React Hooks styled components GraphQL Remote Collaboration

Mobile Engineer

Feracode

Jul 2020 - Jul 2021 (1 year)

Developed a cross-platform mobile app with React Native and React Hooks for a team collaboration and communication platform combining real-time chat with task tracking. Took the product from early development to pre-launch.

React Native React Hooks Mobile Development Cross Platform Development

Front End Architect

Way2Technology

May 2019 - Jul 2020 (1 year 2 months)

Defined the full frontend stack and architecture for a new greenfield product in distributed energy generation, taking it from zero to market launch. Helped define and build the product's design system using React Hooks, styled-components and GraphQL.

React React Hooks styled components GraphQL Design Systems Architecture

Lead Front-end Developer

GETMORE Brasil

Jan 2018 - May 2019 (1 year 4 months)

Led frontend development with React, Redux, TypeScript, Webpack 4 and Semantic UI. Introduced unit testing with Jest and end-to-end testing with Cypress, and deployed applications on AWS.

React Redux TypeScript Webpack Semantic UI Jest Cypress AWS Scrum

Software Developer

devOZ

Aug 2016 - Dec 2017 (1 year 4 months)

Built frontend applications with Ext JS and Polymer, and backend services in Node.js and TypeScript with MongoDB (Mongoose). Wrote unit tests with Mocha and Chai and UI tests with Siesta.