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Front-End Developer specialized in React and TypeScript, focused on building responsive, maintainable, and scalable SPAs with clean architecture, robust state management, and modern UI. Hands-on experience with Zustand, Redux Toolkit, Context API, React Router, Material UI, and Tailwind CSS. Built and deployed an end-to-end production system (React + NestJS + PostgreSQL) featuring JWT authentication, role-based access control (RBAC) with granular permissions, and interactive dashboards. Currently seeking my first formal role as a Junior React / Frontend Developer, bringing full-stack fundamentals as an added strength.…Front-End Developer specialized in React and TypeScript, focused on building responsive, maintainable, and scalable SPAs with clean architecture, robust state management, and modern UI. Hands-on experience with Zustand, Redux Toolkit, Context API, React Router, Material UI, and Tailwind CSS. Built and deployed an end-to-end production system (React + NestJS + PostgreSQL) featuring JWT authentication, role-based access control (RBAC) with granular permissions, and interactive dashboards. Currently seeking my first formal role as a Junior React / Frontend Developer, bringing full-stack fundamentals as an added strength.

Guillermo Ignacio Valera Barros

Front-End Developer, Full Stack Developer, Web Developer, +2

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Front-End Developer specialized in React and TypeScript, focused on building responsive, maintainable, and scalable SPAs with clean architecture, robust state management, and modern UI. Hands-on experience with Zustand, Redux Toolkit, Context API, React Router, Material UI, and Tailwind CSS. Built and deployed an end-to-end production system (React + NestJS + PostgreSQL) featuring JWT authentication, role-based access control (RBAC) with granular permissions, and interactive dashboards. Currently seeking my first formal role as a Junior React / Frontend Developer, bringing full-stack fundamentals as an added strength.…Front-End Developer specialized in React and TypeScript, focused on building responsive, maintainable, and scalable SPAs with clean architecture, robust state management, and modern UI. Hands-on experience with Zustand, Redux Toolkit, Context API, React Router, Material UI, and Tailwind CSS. Built and deployed an end-to-end production system (React + NestJS + PostgreSQL) featuring JWT authentication, role-based access control (RBAC) with granular permissions, and interactive dashboards. Currently seeking my first formal role as a Junior React / Frontend Developer, bringing full-stack fundamentals as an added strength.

Available to hire

Front-End Developer specialized in React and TypeScript, focused on building responsive, maintainable, and scalable
SPAs with clean architecture, robust state management, and modern UI. Hands-on experience with Zustand, Redux
Toolkit, Context API, React Router, Material UI, and Tailwind CSS. Built and deployed an end-to-end production system
(React + NestJS + PostgreSQL) featuring JWT authentication, role-based access control (RBAC) with granular
permissions, and interactive dashboards. Currently seeking my first formal role as a Junior React / Frontend Developer,
bringing full-stack fundamentals as an added strength.

Skills

Experience Level

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Language

Spanish; Castilian

Fluent

English

Advanced

Work Experience

Frontend Developer (React + TypeScript) at Pecán Junín

January 1, 2024 - January 1, 2026

Led the development of an end-to-end operations management system (React 19 + TypeScript + Vite SPA) with a modular architecture: created a CRUD service factory, a reusable useCrudList hook, and a composed component architecture with 15 shared components. Implemented JWT authentication via Context API and interceptors for token handling; built granular RBAC with 20+ enum-based permissions and route guards; delivered interactive dashboards (Recharts) and a 14+ functional modules including orders, clients, products, suppliers, and audit system. Refactored to remove 1009+ lines by consolidating components and utilities; modular backend: NestJS 11 + PostgreSQL 16; REST APIs; Docker; persistent storage; localization.