Kamil Leszczuk
Senior Software Engineer And Team Lead at Taxamo a Vertex Inc. Company
Masovian Voivodeship, Poland
Summary
👤
Senior🎓
Top SchoolKamil Leszczuk is a Senior Software Engineer and team lead with 13 years of experience building full-stack systems and leading engineering teams, currently driving development of a Clojure/ClojureScript e-commerce platform at Taxamo (Vertex). He combines backend architecture skills—event-sourced microservices for loan management at Raiffeisen—with frontend craftsmanship focused on UX and accessibility, having implemented interfaces in React, Vue and Reason. A fan of functional programming, he brings hands-on expertise across telecommunication-grade systems (NFC work for Firefox OS) and modern web stacks, bridging low-level protocol fixes to polished user-facing features. He’s also contributed to Mozilla’s Gaia UI, improving NFC and Bluetooth functionality, showing a long-standing interest in open-source device software. With top honors from Warsaw University of Technology and experience mentoring teams of six, he balances technical depth with people leadership and product-minded design.
13 years of coding experience
9 years of employment as a software developer
Bachelor's degree, ICT & Management In Telco, Excellent, summa cum laude, Bachelor's degree, ICT & Management In Telco, Excellent, summa cum laude at Warsaw University of Technology
English
Stackoverflow
35,304reputation
4.3mreached
447answers
28questions
fonts
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styles
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java
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websocket
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dom
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android
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Github Skills (37)
json10
javascript10
nfc10
linux10
bash10
bluetooth-le10
bluetooth10
scripting9
utf9
protractor9
fonts9
java9
jquery9
multithreading9
websocket9
Programming languages (8)
Github contributions (5)
mozilla-b2g/gaia
Apr 2014 - Sep 2014
DEPRECATED - Gaia is a HTML5-based Phone UI for the Boot 2 Gecko Project. NOTE: For details of what branches are used for what releases, see
Role in this project:
Full-stack Developer
Full-stack DeveloperContributions:25 commits in 4 months
Contributions summary:Kamil contributed to the user interface (UI) and functionality of the Boot to Gecko (B2G) project's Gaia phone UI. They addressed bugs related to the `NfcUtils` and NFC manager, implementing fixes and validations. Further contributions involved adding Bluetooth pairing and file transfer functionality using NDEF records. They also enhanced Smart Poster handling for URI records.
branchesphonejavascriptgaiahtml5
kamituel/systems-toolbox-chrome
Jul 2015 - Aug 2018
Contributions:41 commits, 4 PRs, 28 pushes in 3 years
toolboxchromedevtoolschrome-devtoolschrome-extension
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