Grzegorz Łotysz — Senior Frontend and UI/UX Engineer, resume and selected work
Senior Frontend and UI/UX Engineer and Team Leader with 20+ years of experience architecting scalable, enterprise-grade applications and leading frontend, design and performance optimization efforts. Skilled across the React & TypeScript ecosystem, focused on delivering high-quality, maintainable and future-proof solutions.
Experienced in improving developer experience through custom tooling and thorough documentation, while upholding strong code quality and accessibility. Proven track record in building component libraries, optimizing performance and leading migrations.
Rooted in a design background, combining technical expertise with a keen eye for visual detail.
Other labels
The Codeine - code & creative company (suspended but always in my 🖤)
Friends
Kasia Dobiecka - architecture & design
Mikołaj Pasiński - book design & more
Threedotstype - type foundry
Juice - motion & audio
Contact
Selected work
now — Q4 2025
Boldare
Full Stack Engineer
Enterprise-grade product offering real-time collaboration with video conferencing, multi-channel chat and file sharing.
next ·· nx mono-repo ·· rsc ·· vitest ·· tailwind ·· java spring ·· microservices ·· graphql ·· apollo ·· keycloak ·· i18n ·· a11y ·· github actions
Q4 2025 — Q3 2024
Boldare
Frontend Lead and Engineer
Government platform for companies operating in the labor market, with a focus on performance, scalability and security.
react ·· tanstack routing ·· tanstack query ·· rest ·· SSO ·· feature flags ·· vite ·· vitest ·· msw server ·· msw worker ·· custom ui library ·· gitlab ci
Q3 2024 — Q3 2023
Boldare
Frontend Lead and Engineer
Library of React components. Stateless UI primitives and complex, backend-driven organisms. Used by several teams and published as an npm package on a private registry.
react ·· storybook ·· rollup ·· tanstack query ·· custom 2FA ·· rest ·· vite ·· vitest ·· msw server ·· msw worker ·· material-ui ·· gitlab ci
Q2 2023 — Q1 2023
Boldare
Frontend Engineer
Government platform migration from Vue to React on the frontend and from PHP to Java Spring on the backend.
vue ·· react ·· rest ·· i18n ·· rtl ·· custom ui library ·· gitlab ci
Q4 2022 — Q1 2022
Boldare
Product Designer and Frontend Engineer
Global platform for companies providing installation and maintenance operations in the solar energy market.
react ·· node ·· graphql ·· i18n ·· figma ·· design system ·· github ci
Q1 2022 — Q2 2021
Boldare
Product Designer and Frontend Engineer
Global platform for measurement, planning and transportation management in the mineral resources market.
react ·· styled components ·· storybook ·· hateoas ·· i18n ·· balsamiq ·· design system ·· gitlab ci
Q2 2021 — Q1 2021
Boldare
Product Designer and Frontend Engineer
MVP-grade platform for data visualization and analysis.
react ·· material-ui ·· design system ·· figma ·· github ci
Q1 2021 — Q1 2021
Boldare
Product Designer and Frontend Engineer
MVP-grade platform for an innovative business model in the real estate market.
react ·· material-ui ·· design system ·· figma ·· github ci
Q4 2020 — Q2 2019
Boldare
Product Designer and Frontend Engineer
Platform for managing mass communication through SMS, email and voice campaigns.
angular ·· rest ·· docker ·· rtl ·· sketch ·· design system ·· gitlab ci
Q2 2019 — Q1 2019
Softwaremill
Product Designer
Corporate website for one of the largest software houses in Poland.
adobe xd ·· design system
Q2 2019 — Q1 2019
Juice
Product Designer
Corporate website for one of the most awarded post-production companies in Europe.
sketch ·· design system
Past experience
Q2 2019 — Q1 2013
The Codeine
Co-Founder and Creative Director
Founding and running a design and creative coding company.
♾️
Q1 2013 — Q1 2010
iizt
Polish Division Manager and Art Director
Running the Polish division of iizt, a creative company based in the Netherlands.
♾️
Q1 2010 — Q3 2002
Freelance
Product Designer and Frontend Engineer
Delivering design and frontend work for national and global companies and institutions, including KLM, G-STAR, DEPT, Playboy, NiNA and Adidas.
♾️