Marcin Ostaszewski
Freelance Web Developer at Medallia Inc
Warsaw, Masovian Voivodeship, Poland
Summary
👤
Senior🎓
Top SchoolMarcin Ostaszewski is a freelance Front-End Developer based in Warsaw with nine years of professional experience and over six years focused on modern JavaScript ecosystems, including React, TypeScript, Redux, MobX and TailwindCSS. He has a strong track record delivering features and resolving complex bugs across large microservice codebases and enterprise projects (Medallia, Halfords, AEM clients), and has proven ability to refactor legacy apps for performance, accessibility and SEO. Comfortable working solo for clients as well as within 20+ person international teams, he contributes through code reviews, unit testing and on-call support. His background in graphic design, video editing, animation and photography informs a keen eye for UI detail and usability that often uncovers subtle UX and accessibility improvements. Passionate about 3D and game-making, he brings a creative, multimedia mindset to web development that helps bridge design and engineering.
8 years of coding experience
11 years of employment as a software developer
Full Stack Web Development Certification Computer Software Engineering, Full Stack Web Development Certification Computer Software Engineering at freeCodeCampPostgraduate Studies of Computer Graphics and Design "Collage" in WarsawMSc Philosophy, MSc Philosophy at University of WarsawJavaScript Developer: React Information Technology, JavaScript Developer: React Information Technology at Coders Lab
Russian, English
Stackoverflow
21reputation
0reached
2answers
0questions
Github Skills (12)
html6
css6
javascript6
jquery6
checkbox6
creator3
calculator3
react2
translation2
fleet2
invoice1
micropython1
Programming languages (1)
Github contributions (5)
MarcinOstaszewski/react-turtle-game
May 2020 - Oct 2024
Contributions:19 PRs, 40 pushes, 4 branches in 4 years 5 months
reactreactjs-gamecssjavascriptturtle
MarcinOstaszewski/online-tests-app
Jul 2020 - Jun 2024
Contributions:3 PRs, 14 pushes, 1 branch in 3 years 11 months
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