Mar 2022 – Present · 4 yrs

• ■ Collaborate with Google teams to provide feedback on tools, libraries, and Android, Kotlin, and Firebase updates to enhance the Android ecosystem.
• ■ Experiment with and integrate new Android, Kotlin, and Firebase features and APIs into projects to stay ahead of industry trends.

Oct 2021 – Feb 2025 · 3 yrs 4 mos · Boulder County, Colorado, United States

• ■ Spearhead the development and ownership of the Video SDK for Android, meticulously building, documenting, publishing, and managing the entire SDK from inception.
• ■ Play 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.
• ■ Pioneering innovative open-source projects and libraries, providing real-world solutions for Android & Kotlin that benefit the broader developer community.
• ■ Contribute valuable technical content to Stream's blog and actively share insights in various developer communities.
• ■ Strategize and execute social marketing plans to engage developers, fostering a vibrant community around our products and open-source projects.
• ■ Engage with external developers and content creators, reviewing sponsorship content to foster strong partnerships.
• ■ Act as a dynamic speaker at global and local conferences, sharing our successful experiences and insights with the audience.
• ■ Facilitate communication with customer success and sales teams, collaborating with Korean companies to address their unique needs and requirements.

Jan 2020 – Oct 2021 · 1 yr 9 mos · Gangnam District, 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.
• ■ Written technical posts for introducing trending tech stacks on the company's blog.
• ■ Google Play: https://play.google.com/store/apps/details?id=com.movefastcompany.bora

Jun 2018 – Jan 2020 · 1 yr 7 mos · Gangnam District, Seoul, South Korea

• ■ 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.
• ■ Worked as a freelance Android and IoT engineer with Gyeongju Bird Park, SPOTU, COSCOI, and other companies.
• ■ Developed and published three products related to Android and IoT.

Jun 2017 – Jun 2018 · 1 yr · Gangnam-gu, Seoul, 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 by Kotlin, based on the MVVM architecture with material designs and various animations.
• ■ Published and maintained three Android open-source libraries for the new products. (RibbonViews, Kickback, BlankSpace)
• ■ Google Play: https://play.google.com/store/apps/details?id=com.whalegames.app
• ■ Open source: https://github.com/battleent

Mar 2016 – Jun 2017 · 1 yr 3 mos · Gangnam-gu, Seoul, 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 · 11 mos

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

Jul 2014 – Feb 2015 · 7 mos · Gangdong-gu, Seoul, 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#.