Available to hire
I’m Jakub, a dedicated Senior Frontend Engineer with six years of experience building high-performance web platforms. I’m passionate about translating cutting-edge technology into intuitive, accessible user experiences.
I specialize in React and TypeScript, using modern patterns and tools (Hooks, functional components, state management with Redux, Zustand, MobX, XState, and Next.js) to deliver fast, maintainable apps. I thrive in collaborative, cross-functional teams and strongly advocate for code quality, test coverage, and delightful UX.
Skills
Experience Level
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Intermediate
Intermediate
Intermediate
Intermediate
Intermediate
Intermediate
Language
English
Fluent
Spanish; Castilian
Advanced
Polish
Fluent
Work Experience
Full Stack Engineer at FAO of the United Nations
January 1, 2024 - PresentCreated highly-efficient web platforms using React.js, Next.js and Vite; enhanced UI with Tailwind CSS, styled-components, CSS Modules, and motion for micro-animations; improved data access performance by integrating TanStack Query and Redis-based caching; led development of a high-performance geographic data visualization platform for a large-scale global organization, collaborating with backend developers, UI/UX designers, ML researchers, product managers, and clients; established a robust unit testing strategy with coverage above 80%, reducing production bugs and enabling faster, more reliable feature delivery; managed software deployment and asset administration on Google Cloud Platform.
Software Engineer at United Nations (Remote)
January 1, 2023 - December 31, 2023Developed highly efficient frontend components for complex solutions with React.js, XState, TypeScript and Tailwind CSS; contributed to the growth of Key-drop.com, delivering robust UI and maximizing user engagement for a platform with a large daily active user base.
Software Engineer at Brainly
January 1, 2022 - December 31, 2022Built and maintained React components and frontend features; contributed to CI/CD pipelines to support frequent deployments; collaborated with cross-functional teams to deliver reliable updates for a large community of learners.
Frontend Developer at Mayeryn
July 1, 2020 - December 31, 2021Implemented high-performance frontend features for dashboards and applications; contributed to design systems, UI/UX improvements and frontend performance; collaborated with backend teams to deliver robust experiences for large user bases.
PHP Developer at Mayeryn, Poland
May 1, 2020 - June 30, 2020Developed backend features in PHP, collaborating with frontend teams to deliver integrated solutions.
Intern at DOREA Educational Institute
June 1, 2019 - July 1, 2020Supported web development tasks, gaining hands-on experience with the full software development lifecycle and frontend technologies.
Senior Frontend Engineer at UN 7
November 1, 2023 - April 30, 2024Led frontend development for an AI-driven process management system based on React.js, TypeScript and modern UI libraries. Leveraged GitHub Copilot to accelerate development, improved code quality and test coverage, and contributed to a comprehensive frontend architecture. Built a robust suite of unit and integration tests to ensure reliability and scalability.
Senior Frontend Engineer at Dev Tech
November 1, 2023 - April 1, 2024Led frontend development for an AI-driven process management system using React.js, Vite, Chakra UI, and TypeScript; established GitHub Copilot-backed workflows to boost code quality and velocity. Built a high-performance geospatial data visualization platform in collaboration with backend engineers and designers.
Software Engineer at UN 7
January 1, 2023 - December 31, 2023Developed scalable frontend and integration work for mission-critical systems, contributing to client projects with React.js, XState, and TypeScript; supported rapid production deployments and CI/CD.
Software Engineer at España (Spain)
January 1, 2022 - December 31, 2022Contributed to frontend and backend integration for web applications, optimizing performance and maintainability.
Frontend Developer at Appmia
January 1, 2020 - December 31, 2021Built robust frontend features for web apps using React, TypeScript, and modern tooling; collaborated with backend and design teams to deliver polished user interfaces.
Junior PHP Developer at Mayeryn
May 1, 2020 - June 30, 2020Supported backend development with PHP, updating APIs and maintenance tasks; participated in code reviews and team collaboration.
Education
Bachelor's Degree in Computer Science at West Pomeranian University of Technology in Szczecin, Poland
October 1, 2016 - September 1, 2020Bachelor's Degree in Computer Science at West Pomeranian University of Technology in Szczecin
January 1, 2016 - January 1, 2020Bachelors Degree in Computer Science at West Pomeranian University of Technology in Szczecin, Poland
October 1, 2016 - September 1, 2020Qualifications
Industry Experience
Software & Internet, Professional Services, Education, Media & Entertainment, Government
Skills
Experience Level
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Intermediate
Intermediate
Intermediate
Intermediate
Intermediate
Intermediate
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