Recommended expert

Jan Rzewucki

Frontend Mentor

Jan Rzewucki
Warsaw, Poland

Experience

Nov 2021 - Jun 2022
8 months
Poland

Frontend Mentor

TeachMeSkills

  • 150 hours of frontend lectures
  • Two tracks of lecturing: "HTML & CSS" and "JS Basics"
  • More than 30 students overall.
Sep 2021 - Present
4 years 5 months
Poland

Senior Frontend Engineer

Goldman Sachs

  • 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.

  • 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 Engineer

Oomnitza

  • Managed to improve app loading speed by two times by successfully delivering major tech stack improvements.

  • Provided top-score accessibility of a large application by leading the redesign.

  • Improved static analysis flow so that all formatting is done and checked automatically.

  • Regularly mentored junior-to-mid developers.

  • Managed the tech debt backlog.

  • Developed new features using React, JavaScript, TypeScript, and Redux.

Nov 2018 - Oct 2020
2 years
Belarus

Frontend Engineer

Net2Phone

  • Internationalized a large application.

  • Developed frontend feature flags architecture.

  • Established static analysis flow from git hooks to CI/CD checks.

  • Managed the tech debt backlog.

  • Participated in architecture discussions.

  • Mentored junior developers.

  • Developed new features using Angular and TypeScript.

Summary

Senior Frontend Engineer with seven years of experience. Founder of the best Chess Calendar App out there.

Skills

  • Next.js
  • React
  • Typescript
  • Tailwind
  • Graphql
  • Tanstack-query
  • Jotai
  • Javascript
  • Html5
  • Css3
  • Sass
  • Angular
  • Node.js
  • Headless Cms
  • Redux
  • Webpack
  • Cra
  • Vite

Languages

Belarusian
Native
Russian
Native
English
Advanced
Polish
Intermediate

Education

Sep 2016 - Aug 2020

Belarusian State University of Informatics and Radioelectronics

Bachelors · Minsk, Belarus

Certifications & licenses

Polish B2

Polish State Commission for Polish Language assessments

FCE - Grade A (C1)

Cambridge University Press & Assessment

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