(Full Remote)App Engineer – In-House Product Development

🇯🇵 This position is open to candidates residing in Japan only.🚀 Build the Future of Mobile Apps — Join a Fast-Growing Tech Team (Full Remote)App Engineer – In-House Product DevelopmentAnnual Salary: ¥4,000,000 – ¥5,500,000Employment Type: Full-timeWork Style: Fully Remote (Anywhere in Japan)🌟 Catchphrase / Hiring Message“Shape the products used by millions — from anywhere in Japan.”They are looking for mobile engineers who want to take ownership, innovate freely, and build services that genuinely make an impact.About ThemThey are a Fukuoka-based tech venture founded in 2007, providing mobile app development, web system development, and digital media services. Their business spans:Web System Development – Building a sharing-economy service entirely in-houseMobile App Business – Operating mobile apps with over 2.4M downloadsMedia Business – Running digital media platforms with 750K+ monthly usersTheir services are rapidly expanding, and they are strengthening their engineering team.🌈 Why You’ll Love Working With ThemWork on impactful, large-scale products used across JapanJoin a collaborative team committed to learning and technical excellenceEnjoy autonomy and a modern development environmentWork fully remotely, anywhere within JapanRole & ResponsibilitiesDevelop native iOS/Android applications for in-house and client productsImprove performance, UX, and overall service qualityParticipate in planning, architecture discussions, and ongoing product growth initiativesTech EnvironmentLanguages: Swift, Kotlin, FlutterInfrastructure: AWS, GCPTools: Slack, JIRA, Backlog, GitHubProcess: ScrumRequired QualificationsResiding in JapanJapanese proficiency: N2 or above3+ years of experience in mobile app developmentStrong understanding of iOS/Android OS internalsExperience releasing apps on App Store / Google PlayProficiency with Xcode / InstrumentsProficiency with Android Studio / GradleExperience with OSS libraries used in Android developmentExperience with unit, functional, and E2E testingData modeling skills (RDBMS / NoSQL)Cloud development experience (GCP or AWS)Team development experience using Git-based workflowsPreferred QualificationsTeam leadership or project management experienceExperience with microservicesOn-call support experienceKnowledge of security best practicesIntegration experience with external APIsOSS contributionsExperience with frontend and backend developmentExperience with large-scale traffic systems and cloud infrastructure designCompensation & Work ConditionsSalary: ¥4,000,000 – ¥5,500,000Trial Period: 3–6 monthsHours: 10:00–19:00 (1-hour break)Holidays: 112 days per year + major seasonal holidaysOvertime: ~30 hours/monthBenefits: Full social insurance, commuting allowance per policy, additional benefits available【Interview process】Document screening→ online interview(2-3 times)→Offer