Sebastian Zalewski
Senior Software Engineer at Wolt
Stockholm, Stockholm County, Japan
Summary
👤
Senior🎓
Top SchoolSebastian Zalewski is a senior software engineer with seven years of professional experience, currently building mobile products at Wolt after a senior engineering role at Spotify. He specializes in Android and cross-platform mobile development, passionate about Kotlin Multiplatform, Jetpack Compose/SwiftUI, concurrency, and build systems like Gradle and Bazel. Sebastian has led Android efforts at PayPay—delivering merchant features, a WatchOS companion app that earned internal recognition, and a reputation for shipping reliable, well-tested code. He combines low-level language experience (C/C++) with modern mobile tooling, enjoys automating repetitive work, and brings a practical focus on scalable architectures and developer productivity. Based in Stockholm with roots in Poland, he blends deep hands-on implementation skills with product-minded delivery.
6 years of coding experience
10 years of employment as a software developer
Bachelor's degree, Computer Software Engineering, Bachelor's degree, Computer Software Engineering at Uniwersytet im. Adama Mickiewicza w Poznaniu
English, Polish
Github Skills (43)
kotlin10
github-desktop10
kotlin-library10
bazel-rules10
bazel10
electron9
typescript9
github8
lru8
android8
git8
disk7
kotlin-native6
kotlin-multiplatform6
kotlin-android6
Programming languages (3)
Github contributions (5)
zalewskise/rules_kotlin
Jul 2023 - Oct 2024
Bazel rules for Kotlin
Contributions:19 pushes, 7 branches in 1 year 3 months
bazelbuild/rules_kotlin
Jun 2023 - Jan 2025
Bazel rules for Kotlin
Contributions:4 reviews, 2 PRs, 8 comments in 1 year 6 months
bazelkotlinruleskotlin-librarybazel-rules
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