Piotr Ślesarew
Staff Engineer at Whatnot
Krakow, Lesser Poland Voivodeship
Summary
👤
Senior🎓
Top SchoolPiotr Ślesarew is a Staff Engineer based in Krakow with over a decade of hands-on Android expertise, now leading platform work at Whatnot after progressing through senior and technical lead roles at HSBC, Vodafone, Babylon Health and William Hill. He specializes in Kotlin-first mobile architectures, design systems, unidirectional data flows and stability improvements, with a track record of driving internationalization and CI-driven refactors that reduce bugs and accelerate UI delivery. Piotr combines deep implementation skills (Compose, Coroutines, Dagger, testing frameworks) with team leadership—setting coding standards, mentoring peers and authoring platform components used across large apps. An engineer who favors steady, incremental platform investments, he has repeatedly turned legacy codebases into maintainable, well-documented systems that enable faster feature velocity.
11 years of coding experience
13 years of employment as a software developer
Bachelor's degree of Computer Science, Computer Software Engineering, Bachelor's degree of Computer Science, Computer Software Engineering at Wroclaw University of Technology
Polish, English
Stackoverflow
2,836reputation
254kreached
39answers
4questions
android
top-5%
android-fragments
top-1%
callback
top-1%
Github Skills (38)
android-fragments10
callback10
android9
gradle-plugin7
kotlin7
long-integer6
listview6
lint6
mocking6
overriding6
nose6
sqlite6
python6
java6
unit-testing6
Programming languages (2)
Github contributions (5)
farmapromlab/AndroidTestingPlease
Oct 2014 - Jul 2015
Contributions:10 commits, 1 push in 8 months
sliskiCode/Robust-unit-testing-in-Android
Nov 2014 - Nov 2016
Contributions:65 commits, 65 pushes, 7 branches in 2 years
Find and Hire Top DevelopersWe’ve analyzed the programming source code of over 60 million software developers on GitHub and scored them by 50,000 skills. Sign-up on Prog,AI to search for software developers.