Sebastian Siejek
Frontend Developer at Sebastian Siejek dev
Poznan, Greater Poland Voivodeship
Summary
👤
Senior🎓
Top SchoolSebastian Siejek is a Frontend Developer with eight years of experience building scalable React and Next.js applications and custom WordPress solutions from Poznan, Poland. He architects robust frontends in TypeScript, migrating legacy AngularJS/PHP stacks to modern component-driven systems while documenting reusable UI with Storybook. Comfortable across the stack, he pairs React frontends with Node.js, Firestore or MySQL backends and has shipped self-built apps like Planning Poker and Daily Standup end-to-end. At TimeCamp he focuses on frontend architecture, web components and testing (Jest, Cypress, Playwright) to ensure maintainability and performance. Formerly a team lead building Docker-based custom WordPress themes and CLI tooling, he brings both hands-on coding and delivery leadership. Open to remote and international roles, he’s deliberately expanding backend expertise to grow into a full-stack engineering role.
8 years of coding experience
5 years of employment as a software developer
Engineer's degree Informatyka, Engineer's degree Informatyka at Poznan University of TechnologyTechnik Informatyk, Technik Informatyk at Zespół Szkół Ekonomicznych im. Cyryla Ratajskiego w Śremie
Stackoverflow
1reputation
0reached
0answers
0questions
Github Skills (8)
remote-server9
eve-online6
wordpress-plugin5
backend5
wordpress5
cpython4
java4
python3
Programming languages (6)
Github contributions (5)
sebastiansiejek/meet.us-backend
Mar 2021 - Mar 2022
Contributions:25 reviews, 232 commits, 86 PRs in 11 months
sebastiansiejek/shared-uploads-directory-wp
Jan 2021 - Jan 2022
Wordpress Plugin for upload every media to remote server
Contributions:17 releases, 73 commits, 8 PRs in 1 year
wordpressremote-serverwordpress-pluginvideo
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