Leszek Zawadzki
Co-founder And CEO at Juo
Poland
Summary
👤
Senior🎓
Top SchoolLeszek Zawadzki is a product-focused founder and software engineer with eight years of experience building subscription and ecommerce platforms as Co-founder and CEO of Juo and previously at The Rectangles. He blends hands-on full‑stack engineering and UI design with data-driven UX and CRO, having lectured in UX design at the University of Wroclaw and shipped frontend improvements in notable open-source projects like the high-performance Zed code editor. Leszek pairs algorithmic problem-solving—demonstrated by numerous LeetCode solutions in JS/TS—with practical product instincts that have produced two exits. Based in Poland, he favors incremental optimization for subscription businesses and brings a rare mix of classroom teaching, agency rigor, and startup execution to scaling commerce experiences.
8 years of coding experience
11 years of employment as a software developer
Wrocław University of Science and Technology
Stackoverflow
99reputation
3kreached
2answers
8questions
Github Skills (34)
rust-lang10
algorithms10
snippet10
javascript10
text-editor10
sni10
lintcode10
snips10
backtracking10
ui-design10
data-structure10
recursion10
uid10
front-end-development10
gpu10
Programming languages (6)
Github contributions (5)
neetcode-gh/leetcode
Jul 2022 - Jan 2023
Leetcode solutions
Role in this project:
Full-stack Developer
Full-stack DeveloperContributions:114 commits, 39 PRs in 5 months
Contributions summary:Leszek contributed solutions to various LeetCode problems, primarily focusing on algorithms and data structures. Their work involved implementing solutions in JavaScript and TypeScript, covering a broad range of topics like linked lists, palindromes, dynamic programming, and tree traversals. The user demonstrated proficiency in different algorithm design techniques to solve problems from string manipulation to graph traversal. The contributions involved creating new files, and writing and testing code solutions.
pythonleetcodejavascriptleetcode-solutionsjava
zed-industries/zed
Jan 2024 - Mar 2025
Code at the speed of thought – Zed is a high-performance, multiplayer code editor from the creators of Atom and Tree-sitter.
Role in this project:Full-stack Developer
Full-stack DeveloperContributions:9 PRs, 5 comments, 5 issues in 1 year 2 months
Contributions summary:Leszek contributed to the Zed code editor by implementing new features and fixing bugs across various areas of the codebase. They added functionality for clearing notifications, introduced commands for managing snippets, and improved the git panel's behavior. The user also worked on improving the user interface, including fixing issues related to popover heights and auto-completion, and modifying theme import settings.
gpuirust-langtext-editorzed
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