Our English Conversation app 「AI English Conversation Speak Buddy」uses AI characters to help users learn English Conversation skills in a fun way. Since 2013, we've been developing our own apps and services, centered around English education, and released the 「Speak Buddy」app in 2016. This app uses speech recognition, AI conversation, and digital voice technology, that allows users to study English in a new way by speaking to a host of AI characters. In May, 2019, we achieved the number 1 rank in the app store's Education category. On top of that, in October of 2024, we surpassed 400 million downloads, and our download numbers are continuing to increase day by day. Aside from 「Speak Buddy」, we also have an online service called 「Coach Buddy」specializing in English Coaching that supports each users' daily English studies with the help of a coach, and an online Q&A website that launched in May of 2022 called 「SpeakBUDDY English Study Q&A」where users can ask our professional English coaches about their concerns related to studying English, and are continuing to put effort into the development of new services.

「Open a world of opportunities by achieving true language acquisition」. That is our mission. We believe that if people are able to speak directly to others around the world, that they will have a much wider scope of opportunities available to them. Our main product is our 「AI English Conversation Speak Buddy」app, that uses the latest in voice recognition, AI conversation, and digital voice technology to solve the problem, "I cannot speak English well, so it's too embarrassing for me to speak English in front of others" the many Japanese people who want to learn English face. Through our products, we would like to create a world where as many people as possible can experience the joy of overcoming an obstacle they were told was impossible to defeat, where they can be constantly surprised by new discoveries and information, and where they can have moving and meaningful conversations with friends in other countries.

【An international environment where professional colleagues work as a team】　 ・A server side engineer who got his doctorate in computer science in Europe ・An iOS engineer who has an intensive programming background, who previously worked for an infrastructure company ・A top class UI/UX designer from one of the best design agencies in Australia And more! Our members are all talented, hard working professionals from around the globe. 【Communicating in English】 Since we're a pretty global organization, there are tons of chances to communicate with other members in English. We also have all company meetings in English as well. Even if you don't have confidence in your Japanese skills, we offer classes with coaches where you can brush up your abilities. We also have benefits for our members like offering financial support for taking language certification exams, so there are plenty of chances to improve your language skills without the worry or pressure. 【A Great Work Environment】 We believe that work life balance is an essential factor to ensuring our members can perform at their best. Our members only do about 10~20 hours of overtime on average, and the company has a work environment that makes it easy to enjoy both your work and private life. We have systems like remote work and shifting start times that make it easy to adjust the time and place you work to your preferences. We also have many members who are parents or international members, so we understand the situations and struggles they face at work, and we always strive to create a comfortable environment for all the members at our company.

This is a Senior/Lead Android Developer role for the app “SpeakBuddy” 【What you’ll do】 ・Design (architecture), develop, test, deliver and operations ・Led projects in technical aspects, task management, scheduling and stakeholder collaboration ・Work and support the members inside and outside Android team ・Check, discuss, and install new & useful libraries / technologies 【What You Can Gain】 ・Shape app to revolutionize English education in Japan ・Utilize direct feedback from users to refine app ・Experience of the latest architecture and library such as Compose, Material3, Kotlinx and Modularization 【Development Environment】 Language: Kotlin IDE: Android Studio Architecture: App Architecture (MVVM), Clean Architecture, Modularization DI: Hilt Kotlin: Flow, Coroutine, Serialization Design: In-house design on Compose Material3 (Moving from Material2) Other Tools: GitHub Actions, Firebase Crashlytics, Jira / Confluence, Slack, Figma, AWS 　 【Required Skills】 ・7+ years of Android & Kotlin development or equivalent ・Lead experience in task creation/allocation/management/prioritization, and internal stakeholder management, excelling in guiding team and handling cross-functional tasks ・Experience releasing an app on Google Play Console, troubleshooting complex logic and data structure ・Experience or understanding of App Architecture, MVVM, and unit testing ・Business level English language 【Welcome Skills】 ・Experience developing an in-house product or has equivalent ownership mindset ・Experience of Jetpack Compose, Kotlinx, and modularization ・Knowledge and experience of UI testing ・Strong knowledge of Material Design (Material 3, especially) 【Ideal candidate】 ・Loves learning new things ・Keen on both UI / UX and architecture / business logic ・Has a strong interest in language education & learning ・Enjoys a rapidly changing environment 【Interview Flow】 Casual Interview ↓ Coding Test ↓ Formal Interview 2 Times ↓ Reference Check ↓ Final Interview