Hi, my name is Taku Semba. I mainly work on Android, and strong interested in Media Streaming, Crypto Currency, Kubernetes/Docker, Kotlin Multi Platform.


Jan 2017 ~ current AbemaTV

AbemaTV is a new video streaming service that airs TV show 24 hours straight with variety of channels.

Mar 2018 ~ Aug 2019 Ginco

Ginco is the universal asset hub in the crypto ecosystem and provides a wallet app. Supporting Bitcoin, BitcoinCash, LTC, ETH and ERC20s.

Sept 2015 ~ Mar 2016 Pairs

Pairs is one of the popular dating apps in Japan. It was launched on 2014 but it has already become one of the largest dating apps in Japan with more than 450,000 members.


Apr 2012 ~ Mar 2017 Kobe University Electrical Engineering

Sept 2015 ~ June 2016 University of Washington Electrical Engineering


Spotlight 2.4k stars

Android Library that lights items for tutorials or walk-throughs etc…

MultiSnapRecyclerView 1,9k stars

Android Library for multiple snapping of RecyclerView.

CropMe 239 stars

Android library for cropping images. Move images smoothly, and crop images precisely.

JetHub 74 stars

Sample App with Jetpack components(LiveData, Navigation, ViewModel) + MVVM + coroutine + single activity

see other projects



A book for advanced usage of Kotlin for Android, Server, MPP, etc.

ExoPlayer実践ガイド ~Coreライブラリ編~

A book for practical ExoPlayer usage and basic knowledge of media streaming on Android.

ExoPlayer実践ガイド ~Extensionライブラリ編~

A book for practical ExoPlayer usage of exntension libraries.