Jan-hendrik De Vaal
Android Developer at Combustion Inc.
Western Cape, South Africa
Summary
👤
Senior🎓
Top SchoolJan-hendrik De Vaal is a Senior Android and Kotlin Multiplatform engineer based in Cape Town with over a decade of mobile development experience and a 15+ year background in software craftsmanship. He has led Android teams and shipped production apps across startups and enterprises—most recently contributing to the award-winning Noggin app while consulting through Toptal and Combustion Inc. Comfortable both as a hands-on developer and lead, he brings deep Kotlin, Android architecture and cross-platform expertise from roles at companies like Teamwork, takealot.com and Media24. His academic grounding in applied mathematics and computer science informs a methodical, data-driven approach to problem solving and performance optimization. Known on GitHub as an "Androidmancer," he blends freelance agility with a history of long-term platform stewardship and product-focused engineering.
10 years of coding experience
17 years of employment as a software developer
Master of Science in Engineering (MscEng) Applied Mathematics, Master of Science in Engineering (MscEng) Applied Mathematics at Stellenbosch University
Stackoverflow
3,246reputation
937kreached
25answers
0questions
android
top-5%
material-design
top-1%
Github Skills (51)
material-design10
java9
kotlin9
mvp9
android9
expandable9
android-library9
cropper8
http-client8
predictive8
model-view8
presenter8
kotlin-android8
jvm8
energy7
Programming languages (3)
Github contributions (5)
jhavatar/mythos
Mar 2016 - Mar 2019
A Model-View-Presenter library for Android apps.
Contributions:24 releases, 146 commits, 28 PRs in 3 years
android-appspresenterandroid-libraryandroidmodel-view-presenter
jhavatar/RickAndMortyInterviewCoding
May 2022 - Feb 2025
Contributions:15 PRs, 36 pushes, 6 branches in 2 years 9 months
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