Frontend Engineer specializing in React, Next.js & TypeScript
I build scalable dashboards, internal tools and SaaS applications for companies that need reliable frontend engineering.
#About
I'm a Frontend Engineer with 6+ years of experience building production web applications for international companies.
My work focuses on React, Next.js and TypeScript, building dashboards, internal tools and customer-facing applications that prioritize maintainability, testing and accessibility.
Over the years I've worked on SaaS products, logistics platforms, mapping solutions and enterprise software. I enjoy solving complex UI challenges, designing reusable frontend architecture and collaborating closely with backend engineers and product teams.
While frontend development is my specialty, I'm also comfortable extending features into the backend using NestJS, Express and PostgreSQL whenever a project requires end-to-end ownership.
I'm currently available for remote contract work.
Skills
PlaywrightRTL#Services
Dashboard Development
Business dashboards, admin panels and internal tools.
Interactive Maps
Google Maps, Leaflet, OpenStreetMap, GeoJSON, WebSockets and geospatial visualization.
Frontend Architecture
Reusable components, testing strategies, accessibility and scalable frontend systems.
React & Next.js Development
Customer-facing applications with modern frontend tooling.
#Case Studies
Enterprise Mapping Platform
- Built a reusable mapping platform used across multiple products.
- Created a React abstraction over Leaflet that supports native plugins, custom extensions and iframe communication through an event-driven architecture.
- Implemented clustering, GeoJSON rendering, route visualization and geospatial validation using Turf.js.
Analytics Dashboard
- Designed and built a complex analytics dashboard featuring advanced tables, data visualization and user management.
- Implemented SSR, automated testing and reusable UI components.
Accessible Form Builder
- Contributed to the foundation of a drag-and-drop form builder that evolved into a SaaS product.
- Focused on accessibility, reusable components and dynamic conditional forms.
#My projects
#My experience
- Owned the development of customer-facing frontend features using React, Next.js and TypeScript.
- Designed and maintained a reusable mapping platform powering embedded delivery tracking across multiple products.
- Built a modular React abstraction over Leaflet, enabling seamless integration of native plugins and custom geospatial extensions.
- Implemented WebSocket communication, GeoJSON rendering, clustering, route visualization and custom business logic using Turf.js.
- Built analytics dashboards featuring advanced tables, charts and server-side rendering.
- Developed unit, integration and end-to-end tests using Vitest and Playwright.
- Collaborated with product managers, designers and backend engineers to define technical solutions and deliver production-ready features.
- Developed dashboard applications across logistics, government and SaaS products.
- Contributed to the foundation of an accessible drag-and-drop form builder that later evolved into a commercial SaaS platform.
- Built mapping interfaces for global logistics operations using Google Maps and OpenStreetMap.
- Helped develop and maintain a shared component library used across the engineering team.
- Delivered accessible interfaces compliant with WCAG standards.
- Collaborated closely with backend engineers to design REST integrations and implement complex business workflows.
#Get in touch
Contact info
Prefer to write directly? You can reach me at:
contact@federicodiaz.dev