Hi, I'm
Tobias Marroquin
Frontend Engineer
Building pixel-perfect interfaces and high-performance mobile apps with React & React Native.
About me
Passionate about great user experiences
I'm a frontend developer with 4 years of experience working with React JS and React Native. I enjoy building apps that are not only functional but also provide a great user experience. Throughout my career, I've been involved in different kinds of projects, from early ideas to fully released products. I'm always looking to improve the way I write code, learn new tools, and care about writing clean, maintainable code.
AI-augmented development
I actively integrate AI tools like Claude Code and Cursor into my daily workflow — from code reviews and architecture decisions to complex debugging sessions. This lets me ship faster without sacrificing quality, and stay ahead in a rapidly evolving industry.
Work experience
Where I've worked
Frontend Engineer
AI Innovation Lab / Product Development Cell
- ›Sole Frontend Developer in a multidisciplinary AI Pod — collaborated with PMs, UX/UI designers, and backend engineers to build a high-performance MVP from scratch.
- ›Engineered a modern responsive web architecture using React and Vite, prioritizing speed and seamless UX.
- ›Integrated advanced Generative AI capabilities leveraging Gemini and Claude APIs to power core product features and automated workflows.
- ›Translated UI/UX prototypes into functional, maintainable code within an agile, fast-paced cycle.
Frontend Developer
Globant
- ›Developed and maintained cross-platform mobile applications using React Native and React JS, following clean architecture principles.
- ›Built the La Anónima retail app: pixel-perfect React Native UI from Figma designs, Redux + GraphQL state management, Zod schema validation, and complex nested navigation.
- ›Collaborated with cross-functional teams including designers, backend developers, and QA to deliver high-quality features.
- ›Implemented SOLID principles and AI-augmented code audits for consistent architecture adherence.
Frontend Developer
GlobalLogic
- ›Mobile application development with React Native Expo.
- ›Collaboration with UX/UI designers and backend engineers to define technical solutions.
- ›Contribution to code reviews, ensuring high coding standards and best practices.
- ›Working with Scrum methodology for project management.
Frontend Developer
Global Wizards
- ›Mobile application development with React Native for interactive interfaces optimized for mobile devices.
- ›Integration with Firebase to improve app functionality and ensure user security.
- ›Maintenance and troubleshooting to ensure optimal performance and smooth UX.
- ›Team collaboration for planning, code reviews, and architecture improvements.
React Native Developer
AiMonkey
- ›Integrated new functionalities into the Regatta Fitness app (10k+ downloads) — both server side (Node.js) and frontend (React Native, React JS).
- ›Provided ongoing maintenance for apps built in JavaScript and TypeScript.
- ›Implemented social media features using the Get Social library.
Mobile App Developer (Freelance)
Martin Produce Inc.
- ›Developed a mobile e-commerce app for Android and iOS for a major US food distributor.
- ›Full-stack implementation including REST API and mobile client.
Projects
Things I've built
La Anónima — Retail App
Work projectReact Native retail app for Argentina's major supermarket chain, built at Globant. Pixel-perfect Figma-to-code implementation with complex nested navigation (Drawer + Tab + Stack), Redux + GraphQL state management, Zod schema validation, and a loyalty program integration.
Full-stack URL shortener with analytics dashboard. Users create short aliases and track click statistics (clicks per day, peak hours, weekly trends). Features JWT auth, 70 integration tests, and Playwright E2E tests.
Calorie counter built with React and Vite. Uses useReducer for state management, TypeScript for type safety, and Tailwind CSS for styling.
Web tip calculator with real-time split calculations. Built with React, TypeScript, and Tailwind CSS.
E-commerce shopping cart for guitar products. Implements cart logic, product listing, and persistent state.
Skills
My tech stack
Frontend
Mobile
Backend & Tools
AI & Productivity
Contact
Let's work together
I'm open to new opportunities. Whether you have a question or just want to say hi — my inbox is always open.