Krzysztof Jelski
Technical Lead Manager at Waymo
Warsaw Metropolitan Area Poland
Summary
🤩
Rockstar🎓
Top SchoolKrzysztof Jelski is a technical lead and engineering manager with 12 years of software experience, currently leading teams at Waymo after a string of senior roles in fintech and Web3. He blends hands-on full-stack development—contributing to notable open-source projects like the polkadot-js/apps Electron UI—with strong delivery discipline rooted in Agile and Test-Driven Development. He has scaled engineering orgs, launched multi-chain stablecoin products under regulatory constraints, and shipped user-facing cryptographic proving flows in Rust and TypeScript. A pragmatic coach by background, he focuses on clean, maintainable code and professional team practices that align engineering work tightly with business outcomes. Trained in both computer science and psychology, he brings technical depth plus an unusual sensitivity to team dynamics and developer mentoring.
11 years of coding experience
18 years of employment as a software developer
MSc Eng Computer Science, MSc Eng Computer Science at Warsaw University of TechnologyMA Psychology, MA Psychology at University of Warsaw
Stackoverflow
344reputation
9kreached
14answers
0questions
Github Skills (26)
javascript10
electron10
typescript10
ui-design10
webpack10
uid10
front-end-development10
webpacker10
typescript-types10
typescripts10
react10
substrate9
css9
blockchain9
polkadot-js9
Programming languages (10)
Github contributions (5)
polkadot-js/apps
May 2020 - Oct 2021
Basic Polkadot/Substrate UI for interacting with a Polkadot and Substrate node. This is the main user-facing application, allowing access to all features available on Substrate chains.
Role in this project:
Full-stack Developer
Full-stack DeveloperContributions:68 reviews, 25 commits, 52 PRs in 1 year 4 months
Contributions summary:Krzysztof primarily focused on developing the user interface for the Polkadot/Substrate application, specifically the Electron-based desktop application. Their contributions included setting up the basic Electron app, integrating React components, configuring webpack for both renderer and main processes, and implementing features like hot module replacement. They also improved security by isolating the main and renderer processes and added a content security policy. Furthermore, the user enhanced the application's functionality with the implementation of a bounty list and updated the account creation process.
substrateblockchainwalletchainssubstrate-node
Pragmatists/tdd-day1
Oct 2014 - Oct 2016
Contributions:5 commits, 3 pushes in 2 years
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