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HIRE ANDROID DEVELOPER
Senior Android engineer with 8+ years shipping production apps at Rakuten and U.S. Bank. Available for fractional mobile lead roles, architecture audits, and production-grade delivery — remote, worldwide.
Last updated: May 2026
START A CONVERSATIONWhy hire me
8+ years production experience
Shipped Android at Rakuten-scale e-commerce and U.S. Bank enterprise banking. Deep expertise in MVVM, Redux/MVI, multi-module architecture, Dagger/Hilt, and production diagnostics.
Production-grade delivery
Sub-1% crash rates, enterprise security review passes, and comprehensive CI/CD pipelines. Code that holds up under real user load and strict compliance requirements.
Remote-native collaboration
Structured daily standups, async updates via Slack/Linear, and weekly video check-ins when needed. Based in Japan, collaborating with teams across APAC, EU, and US.
Full-stack capability
Beyond Android — cross-platform with Flutter/KMP, Next.js web delivery, Firebase/Supabase backends, and ASO/SEO growth strategy. One partner for your entire mobile product.
What you get
- Fractional Android lead — architecture, code review, and sprint planning
- Native Android (Kotlin) with MVVM, Redux/MVI, Dagger/Hilt, and multi-module structure
- Cross-platform delivery with Flutter or Kotlin Multiplatform
- Production diagnostics — crash/ANR analysis, memory profiling, and device-specific fixes
- CI/CD setup (Bitrise, GitHub Actions) and release pipeline automation
How it works
Discovery
Stakeholder interviews to align on product vision, followed by a deep codebase audit covering architecture, test coverage, and build times. I then recommend platform selection — native Android, Flutter, or Kotlin Multiplatform — based on your timeline, existing team shape, performance requirements, and long-term maintenance capacity.
Architecture
Design of modular project structure, dependency injection strategy using Dagger or Hilt, state management patterns such as MVVM or MVI, and API contract design with strong typing. All major decisions are documented in an Architecture Decision Record to preserve context for future team members.
Development
Sprint-based delivery with structured PR templates, mandatory code review, and weekly demo sessions. Native modules are used for platform-specific capabilities like camera or Bluetooth, while shared UI and business logic layers eliminate duplication across iOS and Android.
QA & Release
Comprehensive automated testing including unit tests, integration tests, and screenshot testing to prevent visual regressions. CI/CD pipelines on Bitrise or GitHub Actions manage staging builds, staged rollouts, and automated crash monitoring integration for production confidence.
Growth
Post-launch ASO metadata optimization, store asset preparation including screenshots and preview videos, analytics instrumentation with Firebase or Amplitude, and a dedicated support window to stabilize crash rates and user retention metrics.
Recent delivery
Deckbase
Built a production-grade Flutter flashcard app featuring FSRS spaced-repetition scheduling, offline-first Drift/SQLite architecture handling 10,000+ cards locally, and real-time Firebase sync — shipped to App Store and Google Play alongside a Next.js marketing site optimized for organic acquisition.
Case study →
TaskGate
Delivered a Flutter digital-wellness application with native iOS and Android SDK integrations for partner app gating, scheduled app-blocking logic, and Firebase Cloud Functions backend — achieving sub-1% crash rate and passing enterprise security review.
Case study →
LoA
Shipped native Android and iOS mindfulness apps with app-intercept layers, customizable affirmation flows, subscription paywalls, and a Next.js web companion — resulting in consistent 4.5+ star ratings and stable DAU growth.
Case study →Engagement
Fractional Lead
2–3 days per week embedded with your team. Ideal for ongoing roadmap delivery, architecture decisions, and mentoring while you scale.
Project-Based Delivery
Fixed-scope sprints (4–8 weeks) with clear milestones. Best for MVPs, feature launches, and greenfield builds.
Advisory Retainer
Architecture review, code audits, and technical strategy on a monthly basis. Perfect for teams that need senior oversight without full-time commitment.
Trust
8+
Years experience
4+
Apps shipped
24h
Response time
1 week
Paid trial
Trusted at
Testimonials
Yosuke built our Android payment flow with impeccable attention to edge cases. The code was clean, well-tested, and shipped two weeks ahead of schedule.
— Product Lead, Fintech Startup
Migrating our legacy Java codebase to Kotlin was seamless. Yosuke's architectural decisions reduced our crash rate by 80%.
— CTO, E-commerce Platform