Jaewoong Eum

skydoves

Senior Developer Advocate & Engineer at RevenueCat

Google Developer Experts, Android

Google Developer Experts, Firebase

About Me

Hi, I'm Jaewoong Eum, also known as skydoves in the developer community. I'm a Senior Developer Advocate & Engineer at RevenueCat, where I build SDKs and developer tools while driving developer advocacy.

I'm a Google Developer Expert for Android and Firebase. Over the years, I've created more than 100+ open-source libraries and projects that have achieved over 15 million annual downloads from developers worldwide, affecting more than 2 billion end-users across millions of different Android applications.

I believe that "Practice is the only shortcut." Consistency is what separates those who dream from those who build. Every single day I show up — writing code, reviewing pull requests, publishing libraries, and sharing knowledge — not because any single day feels transformative, but because the compounding effect of consistent effort is unstoppable. Engineering is an ongoing journey where overcoming challenges builds stronger developers, and I'm committed to walking that path every day.

I'm passionate about sharing knowledge through books, courses, and my subscription platform Dove Letter, helping developers worldwide level up their skills through continuous, daily learning.

Consistency in action — my GitHub contributions

Highlights

Senior Developer Advocate & Engineer

RevenueCat

Building SDKs, developer tools, and driving developer advocacy for in-app purchase infrastructure used by thousands of apps worldwide.

Google Developer Expert

Android & Firebase

Recognized by Google for expertise in Android and Firebase. Actively contributing to the developer community through open-source projects, books, and educational content.

Open-Source Creator

100+ Libraries & Projects

Creator of popular libraries like Pokedex, Balloon, Landscapist, Sandwich, and many more. Projects have collectively reached over 15 million annual downloads from developers worldwide.

Author & Educator

Books, Courses & Dove Letter

Author of "Manifest Android Interview" and "Practical Kotlin Deep Dive." Creator of the Kotlin Deep Dive Course and Dove Letter, a subscription platform for Android & Kotlin developers.

Career Timeline

Apr 2025 — Present

Senior Developer Advocate & Engineer

Full-time

RevenueCat · San Francisco, CA

Pioneer innovative open-source projects and libraries, delivering real-world Android and Kotlin solutions that benefit the broader developer community.
Advocate for RevenueCat products by creating educational content, including blog posts and codelabs, contributing to RevenueCat's official blog and actively sharing insights across developer communities.
Collaborate on engineering initiatives to improve RevenueCat's Android, Jetpack Compose, and Kotlin Multiplatform SDKs by working closely with the engineering team, providing feedback, and helping refine product quality.

Oct 2021 — Feb 2025

Senior Developer Relations Engineer (Android/WebRTC)

Full-time

Stream · Boulder County, CO

Spearheaded the development and ownership of the Video SDK for Android, meticulously building, documenting, publishing, and managing the entire SDK from inception.
Played a crucial role in enhancing the Stream Chat SDK for Android, collaborating with the Android developer team to conduct thorough code reviews and implement improvements.
Pioneered innovative open-source projects and libraries, providing real-world solutions for Android & Kotlin that benefit the broader developer community.

Jan 2020 — Oct 2021

Android Software Engineer

Full-time

Hyperconnect · Seoul, South Korea

Developed new features for Hakuna Live (Social Live Streaming) Android application.
Introduced new tech stacks and refactored the previous architecture and base codes.
Supported Android SDK business team.

Jun 2018 — Jan 2020

Open Source Software Engineer & Remote Freelance

Digital Nomad · Seoul & Singapore

Worked as a freelance software engineer with Digital nomad life in Singapore for 2 months.
Focused on contribution & developing open-source projects and libraries.
Published more than 12 Android open-source libraries & 3 trending open-source projects.

Jun 2017 — Jun 2018

Android Software Engineer

Full-time

Battle Entertainment · Seoul, South Korea

Worked as an Android software engineer.
Refactored a previous old project of the Android application.
Developed and architected a new project (4.0) of the Android application and released it on Google Play. The application was entirely written in Kotlin, based on the MVVM architecture with material designs and various animations.

Mar 2016 — Jun 2017

Android & IoT Engineer

Full-time

COSCOI · Seoul, South Korea

Worked as a software engineer focusing on Android and IoT.
Developed more than five Android applications related to IoT and several SI/SM products — NFC, BLE 4.0, WiFi Connection, Beacon, RC Car.
Tried various businesses and taught Android engineering to the development team.

Mar 2015 — Feb 2016

Freelance Software Developer

Freelancer · South Korea

Worked as a software freelancer.
Contracted and developed more than 5 Android applications.

Jul 2014 — Feb 2015

Software Developer

Full-time

RealSMART · Seoul, South Korea

Worked as a part-time Android developer & .NET developer.
Developed an Android application doing scanning and marking using OpenCV.
Developed Windows applications using .NET C#.

2014 — 2020

Bachelor's Degree, Software Engineering

Gachon University

Explore More

Books

Android & Kotlin technical books

Courses

Kotlin Deep Dive certification course

Open Source

100+ libraries and projects

Dove Letter

Subscription platform for developers

Articles

Medium posts & Dove Letter articles

GitHub

View all repositories