10/25/2026 updated
100 % available
Senior Frontend Developer | React, UX/UI & Code Quality
Barcelona, Spain
Only remote
Master in Online Marketing, Universitat Pompeu FabraAbout me
Senior Frontend Developer with 6+ years of experience in React, Next.js, and TypeScript. I help businesses improve web apps through clean code, reusable UI components, and better UX. I have proven experience working with professional teams in Germany and internationally, across SaaS, AI and SEO.
Next.jsTypeScriptReact.jsFigmaFront End Software DevelopmentReact ReduxRestful Api
Frontend Development & React/TypeScript
Specialized in building modern web applications with React, Next.js, and TypeScript. Experience includes SaaS platforms, dashboards, conversational AI applications, reusable UI components, and enterprise tools. Focused on maintainable code, responsive interfaces, and high-quality implementation.
Frontend Consulting & Code Quality
Helping teams improve existing frontend applications through code quality assessments, maintainability improvements, and practical implementation recommendations. Able to identify areas for improvement and contribute directly to implementing solutions.
UI/UX & Reusable Component Libraries
Experience translating Figma designs into polished, responsive interfaces and developing reusable UI components and component libraries. Focused on usability, visual consistency, responsive behavior, and aligning design with technical requirements, using tools and technologies such as Figma and Tailwind CSS.
Frontend Performance & Optimization
Identifying opportunities to improve frontend loading performance, responsiveness, and rendering behavior. Combining implementation experience with an understanding of frontend performance and user experience.
State Management & API Integration
Experience with Redux Toolkit, TanStack Query, Context API, and REST APIs for managing application state and integrating frontend applications with backend services.
Full-Stack Development & Backend Integration
Primarily focused on frontend development, with additional experience integrating backend services and working with technologies such as Node.js, Django, Supabase, and FastAPI. Familiar with PostgreSQL and MySQL in full-stack application contexts.
Testing & Code Reliability
Practical experience with Vitest, React Testing Library, Jest, and Puppeteer to support frontend testing and reliable application behavior.
SEO & Website Optimization
Previous professional experience in SEO and digital marketing, complemented by frontend development knowledge. Able to identify technical website optimization opportunities related to rendering, performance, and search engine accessibility.
Development Tools & AI-Enabled Interfaces
Experience building conversational AI interfaces and working with modern frontend tools. Familiar with Vercel, AWS, Jira, and Confluence in development environments. Focused on practical solutions, reusable implementations, and efficient prototyping.
Experience
Professional experience5 - 10 years
Freelancer since2024
Languages
GermanGoodEnglishFluentSpanishFluent
Project history
Development of JavaScript-related projects including a frontend for a conversational AI platform using React, TypeScript, Tailwind and AWS; frontend for antenna manufacturers using Next, TypeScript and Redux (RTK); a sustainable event planning application using Next, TypeScript and Supabase; a trucking landing page with SEO optimization using Next, TypeScript and Vercel; and a mobile application for users to create and share stories using React Native.
Development of JavaScript-related projects. Supported a human ergonomics application using Vue and TypeScript.
Developed a German car company's internal tools using React and TypeScript; built a UI/UX library for a Frankfurt-based bank using React, Jest and Puppeteer; and worked as an IT-Service Provider for Bank/Insurance Companies using JavaScript and PHP full-stack.