Jan Rzewucki
Senior Frontend Engineer
Experience
Sep 2021 - Present
3 years 7 months Poland
Senior Frontend Developer
Goldman Sachs
Goldman Sachs is an American multinational investment bank and financial services company. Second largest investment bank in the world by revenue ($9.62B) and is ranked 57th on the Fortune 500
Achievements:
- Led solo refactoring and strategic redesign of a core application, ensuring longevity, cost efficiency, and improved business operations
- 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
Nov 2020 - Aug 2021
10 months Poland
Frontend Developer
Oomnitza
Oomnitza is an American SaaS startup for the Asset Management. $40M Total Funding. More than $25M annual revenue
Achievements:
- Managed to improve app loading speed by 2 times by successfully delivering major tech stack improvement
- Providing top-score accessibility of a huge application by leading the redesign
- Improved static analysis flow so that all of formatting is done and checked automatically
Daily duties:
- Regularly mentoring junior-to-mid developers
- Managing Tech Debt backlog
- New features development in React, JS + TS, Redux
Nov 2018 - Oct 2020
2 years Belarus
Frontend Developer
Net2Phone
Net2Phone is an American VoIP Telecom company found in 1990. $185M annual revenue. SaaS model
Achievements:
- Internationalization of the huge app
- Developing frontend Feature Flags architecture
- Establishing static analysis flow: from git hooks to CI/CD checks
Daily Duties:
- Managing Tech Debt Backlog
- Participating in architecture discussions
- Mentoring Junior developers
- New features development in Angular and Typescript
Summary
Senior Frontend Developer with six years of experience. Founder of the best Chess Calendar App out there
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
Languages
Russian
Native
English
Advanced
Polish
Advanced
Education
Sep 2016 - Jun 2020
Belarusian State University of Informatics and Radioelectronics
Minsk, Belarus
Certifications & licenses
Polish B2
Polish State Commission for Polish Language assessments
FCE - Grade A (C1)
Cambridge University Press & Assessment English
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