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Sebastián Sanjorge
From Argentina
$20/hr or $36,000/yr

Active over a week ago


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Frontend Engineer

Front-end Engineer
Available for hire
Years of experience
4+ years

I’m a Frontend Engineer with experience building scalable, pixel-perfect applications using React, TypeScript, and modern UI architectures. I’ve worked in international teams on real-time platforms and enjoy translating business needs into reliable, high-quality interfaces.

I’m looking for a role where I can contribute to production systems, collaborate with cross-functional teams, and continue growing in frontend and system design.

Employment History

Frontend Engineer at IPH Spain 2025 - 2026
• Engineered frontend systems for a real-time geolocation and traceability platform used in underground mining operations, supporting mission-critical workflows • Developed scalable UIs within a microfrontend architecture, enabling modular deployments and independent feature delivery across teams • Implemented RBAC authorization system across routes and components, reducing risk of unauthorized access and improving consistency in permission handling • Optimized rendering and state management, eliminating unnecessary re-renders in critical views and improving responsiveness during real-time updates • Applied TDD using Vitest and React Testing Library, reducing regression issues and increasing confidence in production releases • Worked within established CI/CD workflows, ensuring code quality through testing and code review processes • Applied accessibility standards (ARIA, semantic HTML, keyboard navigation), improving usability for keyboard navigation and assistive technologies • Actively contributed to technical decision-making and feature design within a cross-functional team of 15 engineers • Mentored team members on RBAC patterns and frontend architecture practices, improving consistency in implementation across the codebase
Frontend Engineer at Freelance Current 2021 - Now
• Built and deployed production-ready single-page applications (SPA) using React and TypeScript for multiple clients • Delivered responsive, high-performance UIs, improving load times and overall user experience across projects • Implemented component-driven architectures and reusable UI systems, reducing duplication and improving maintainability • Applied unit and component testing, improving code reliability and reducing post-deployment issues • Managed end-to-end delivery, from requirements gathering to deployment, ensuring alignment with client needs • Worked directly with stakeholders, translating business requirements into scalable and maintainable frontend solutions

Education

Full Stack Web Development at Henry Bootcamp 2023 - 2024
Design Studies at Universidad de Buenos Aires 2014 - 2016