06/04/2026 updated
100 % available
Senior Frontend / Tech Lead Engineer | React, TypeScript, Angular | 17+ years
León, Spain
Only remote
HND in Software EngineeringAbout me
Results-oriented Senior Software Engineer with 17+ years of experience. Expert in React, TypeScript, and frontend architecture. Led large Angular.js-to-React migrations using micro-frontends. Passionate about code quality, testing strategies, and mentoring development teams.
TypeScriptReact Native
Frontend Development
JavaScript expertise with 15 years of experience, React development for 5 years, and TypeScript proficiency for 8 years
Component-Driven Development
Building modular, reusable and scalable UI systems using CDD principles, improving consistency and speeding up delivery
Performance Optimization
Optimizing frontend performance focusing on accessibility to deliver fast, inclusive and user-friendly experiences
Angular Framework
Angular development experience for 4 years with NgRx state management
Backend Technologies
Node.js development for 2 years and .NET/C# expertise with 15 years of experience
Database Management
SQL Server administration for 10 years, PostgreSQL for 3 years, and MongoDB for 1 year
Testing and Quality Assurance
Jest/Vitest testing frameworks for 4 years and Cypress/Playwright for 5 years
DevOps and Deployment
CI/CD pipeline management for 7 years, Docker containerization for 4 years, and Git version control for 11 years
Development Tools
Storybook component development for 5 years and Redux/TanStack Query state management for 5 years
JavaScript expertise with 15 years of experience, React development for 5 years, and TypeScript proficiency for 8 years
Component-Driven Development
Building modular, reusable and scalable UI systems using CDD principles, improving consistency and speeding up delivery
Performance Optimization
Optimizing frontend performance focusing on accessibility to deliver fast, inclusive and user-friendly experiences
Angular Framework
Angular development experience for 4 years with NgRx state management
Backend Technologies
Node.js development for 2 years and .NET/C# expertise with 15 years of experience
Database Management
SQL Server administration for 10 years, PostgreSQL for 3 years, and MongoDB for 1 year
Testing and Quality Assurance
Jest/Vitest testing frameworks for 4 years and Cypress/Playwright for 5 years
DevOps and Deployment
CI/CD pipeline management for 7 years, Docker containerization for 4 years, and Git version control for 11 years
Development Tools
Storybook component development for 5 years and Redux/TanStack Query state management for 5 years
Experience
Professional experience10+ years
Freelancer since2025
Languages
EnglishFluentDutchBasic knowledgeSpanishNative speaker
Project history
Led the migration of a large enterprise application from Angular.js to React, designing the full migration architecture adopted by multiple teams. Introduced a micro-frontend architecture using Module Federation, enabling independently deployable vertical slices and long-term scalability. Mentored a team of 15 developers in modern React, architecture, and efficient workflows. Built a shared React component library used across several internal projects.
Delivered key frontend and backend features for a private-label application used by aesthetic clinics in the USA. Improved code quality by adding missing tests, resulting in a more reliable and maintainable codebase.
Worked on an application to optimize vessel management, including tracking vessel information, port arrival alerts and ETA data. Taught React fundamentals and best practices to team members and helped integrate React into the existing ecosystem.