Rafał Leszczyński
Engineering Manager at Buffer
Greater Poland Voivodeship
Summary
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Rockstar🎓
Top SchoolRafał Leszczyński is an engineering manager with 11 years of experience building and leading remote-first teams for SaaS products, currently shaping growth and marketing engineering at Buffer. He has repeatedly bootstrapped and scaled cross-functional cloud and platform teams at Sourcegraph and Auth0, combining engineering, product, and technical program management to deliver predictable roadmaps and measurable outcomes. A hands-on former front-end engineer, Rafał contributes to open-source (notably extending ESLint rules for Ember) and brings practical expertise in performance-sensitive web apps and distributed cloud infrastructure. He excels at reorganizing teams for focus and delivery—growing teams, improving processes, and reducing operational costs while navigating audits and multi-tenant cloud transitions. Outside work he blends a geeky curiosity with outdoor pursuits, reflecting a pragmatic, people-first leadership style that supports individual growth and cross-team collaboration.
11 years of coding experience
11 years of employment as a software developer
Master, Law, Master, Law at University of WroclawBachelor, Digital Media and Electronic Communication, Bachelor, Digital Media and Electronic Communication at University of Lower Silesia
English, Polish
Stackoverflow
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0reached
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Github Skills (6)
guideline10
linting10
emberjs10
javascript10
eslint10
eslint-plugin10
Programming languages (8)
Github contributions (5)
ember-cli/eslint-plugin-ember
Jun 2016 - Sep 2016
An ESLint plugin that provides set of rules for Ember applications based on commonly known good practices.
Role in this project:
Front-end Developer
Front-end DeveloperContributions:33 commits in 3 months
Contributions summary:Rafał primarily contributed to the `eslint-plugin-ember` repository by implementing and extending various ESLint rules for Ember.js applications. Their work involved writing new rules, modifying existing ones, and expanding test suites to cover a wider range of Ember component and controller patterns, including those involving mixins and services. They also refactored helper methods and tests to improve the functionality and maintainability of the codebase.
eslintcommonlygood-practiceslintingjavascript
RafLeszczynski/agencja-tlumaczen
Sep 2015 - Nov 2020
Website for a translation agency build with Express, React and Webpack
Contributions:102 PRs, 114 pushes, 106 branches in 5 years 3 months
reactagencytranslationexpresswebpack
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