About Jan
Senior Frontend Engineer with 7 years of experience. Founder of the best Chess Calendar App out there – (aka wcc . gg)
I represent my own service company named TTIT (can be found at ttit . io) and our portfolio is showcased here clutch . co/profile/ttit
Key Technologies I’ve worked with:
Next.js, React, TypeScript, Tailwind, GraphQL, tanstack-query, jotai, JavaScript, HTML5, CSS3, Sass, Angular, Node.js, Headless CMS, Redux, Webpack/CRA/Vite
English
Fluent
Polish
Native or bilingual
Russian
Native or bilingual
Remote only
Primarily works remotely
Experience
- Goldman Sachs,Senior Frontend EngineerSeptember 2021 - Today (4 years and 9 months)Poland• Led solo refactoring and strategic redesign of a core application, ensuring longevity, cost efficiency, and improved business operations.• Led a major uplift of a core monorepo used across the entire GS organisation• Delivered a new budget planning automation application in two weeks, demonstrating project management and coding skills under pressure.• Directed technical aspects of a central dashboard redesign, ensuring smooth delivery within a 7-day timeframe, showcasing leadership and efficiency. Daily Duties:• Mentored developers of all levels, fostering a collaborative learning environment and promoting skill development.• Implemented CI/CD pipelines for frontend projects, ensuring seamless integration, automated testing, and efficient deployment
- TeachMeSkills,Frontend MentorNovember 2021 - June 2022 (7 months)Poland• 150 hours of Frontend lectures• Two tracks of lecturing: "HTML & CSS" + "JS Basics"• More than 30 students overall
- Oomnitza,Frontend EngineerNovember 2020 - August 2021 (9 months)Poland• Regularly mentoring junior-to-mid developers• Managing Tech Debt backlog• New features development in React, JS + TS, Redux
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Education
- BachelorsBelarusian State University of Informatics and Radioelectronics2020Bachelors
- FCE - Grade A (C1)Cambridge University Press & Assessment2016FCE - Grade A (C1)