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Senior Frontend Engineer with 5+ years of experience building and scaling products in early-stage startups. Throughout my career, I have worked in fast-paced environments where engineering decisions directly impacted product growth, operational efficiency, and user experience. My expertise is centered on React and TypeScript, with strong experience in frontend architecture, performance optimization, state management, testing, and developer experience. I also have experience with Node.js, Go, and Rust, allowing me to collaborate effectively across the stack when needed. Beyond my professional work, I created Profile Readme Generator, a platform used by thousands of developers that attracts ~60,000 monthly visits, and two VS Code extensions with more than 40,000 combined downloads. I've also contributed to open-source projects such as Apache ECharts and Yup.…Senior Frontend Engineer with 5+ years of experience building and scaling products in early-stage startups. Throughout my career, I have worked in fast-paced environments where engineering decisions directly impacted product growth, operational efficiency, and user experience. My expertise is centered on React and TypeScript, with strong experience in frontend architecture, performance optimization, state management, testing, and developer experience. I also have experience with Node.js, Go, and Rust, allowing me to collaborate effectively across the stack when needed. Beyond my professional work, I created Profile Readme Generator, a platform used by thousands of developers that attracts ~60,000 monthly visits, and two VS Code extensions with more than 40,000 combined downloads. I've also contributed to open-source projects such as Apache ECharts and Yup.

Mauro de Souza

Front-End Developer, Software Engineer, Web Developer, +2

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Senior Frontend Engineer with 5+ years of experience building and scaling products in early-stage startups. Throughout my career, I have worked in fast-paced environments where engineering decisions directly impacted product growth, operational efficiency, and user experience. My expertise is centered on React and TypeScript, with strong experience in frontend architecture, performance optimization, state management, testing, and developer experience. I also have experience with Node.js, Go, and Rust, allowing me to collaborate effectively across the stack when needed. Beyond my professional work, I created Profile Readme Generator, a platform used by thousands of developers that attracts ~60,000 monthly visits, and two VS Code extensions with more than 40,000 combined downloads. I've also contributed to open-source projects such as Apache ECharts and Yup.…Senior Frontend Engineer with 5+ years of experience building and scaling products in early-stage startups. Throughout my career, I have worked in fast-paced environments where engineering decisions directly impacted product growth, operational efficiency, and user experience. My expertise is centered on React and TypeScript, with strong experience in frontend architecture, performance optimization, state management, testing, and developer experience. I also have experience with Node.js, Go, and Rust, allowing me to collaborate effectively across the stack when needed. Beyond my professional work, I created Profile Readme Generator, a platform used by thousands of developers that attracts ~60,000 monthly visits, and two VS Code extensions with more than 40,000 combined downloads. I've also contributed to open-source projects such as Apache ECharts and Yup.

Available to hire

Senior Frontend Engineer with 5+ years of experience building and scaling products in early-stage startups. Throughout my career, I have worked in fast-paced environments where engineering decisions directly impacted product growth, operational efficiency, and user experience.

My expertise is centered on React and TypeScript, with strong experience in frontend architecture, performance optimization, state management, testing, and developer experience. I also have experience with Node.js, Go, and Rust, allowing me to collaborate effectively across the stack when needed.

Beyond my professional work, I created Profile Readme Generator, a platform used by thousands of developers that attracts ~60,000 monthly visits, and two VS Code extensions with more than 40,000 combined downloads. I’ve also contributed to open-source projects such as Apache ECharts and Yup.

Skills

Experience Level

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Intermediate

Intermediate

Intermediate

Intermediate

Beginner

Language

Aragonese

Intermediate

Work Experience

Senior Frontend Engineer at Terrantic

April 1, 2023 - April 1, 2025

Built and evolved internal and product-facing frontend capabilities for an early-stage B2B platform serving enterprise clients and end users. Implemented an internal CMS to centralize user management and access control, improving performance and simplifying administration while removing the need for developers to query the database directly. Developed a drag-and-drop dashboard builder that decentralized data visualization so non-technical stakeholders could create reports without engineering intervention, reducing ticket backlog. Led a migration to a modern UI system (ShadCN/Tailwind) to standardize components and enable reuse for faster feature delivery. Standardized data fetching with React Query to minimize unnecessary reloads and provide smoother navigation across the platform.

Senior Frontend Engineer at Fluid API

August 1, 2022 - February 1, 2023

Led the frontend architecture for a React-based workflow canvas, enabling launch of a flagship automation platform and transitioning from manual file-based configurations to a self-service visual experience. Built a custom JSON Schema interpreter to generate and validate dynamic forms, reducing hardcoded UI and improving scalability. Architected a real-time communication layer using Firebase to support in-canvas integration testing and debugging, eliminating reliance on external applications during development.

Frontend Engineer at Fpass

June 1, 2021 - July 1, 2022

Rebuilt real-time chat infrastructure using React and Firebase, cutting operational costs by $500/month while maintaining real-time communication capabilities. Architected a configuration-driven admin system for dynamic screen and form generation, accelerating feature delivery and enabling easier customization. Built a schema-driven landing page generator with Next.js to reduce manual page development and speed up marketing workflows. Rebuilt the platform API from the ground up using Node.js and NestJS to replace a legacy system and improve long-term scalability.