Lead Android Developer

Ruby Labs is a leading tech company that creates and operates innovative consumer products. We offer a diverse range of opportunities across the health, education, and entertainment industries. Our innovative teams are driving the future of consumer-led products, and we're always looking for passionate individuals to join us. Learn more about our story at: https://rubylabs.com/about-us/

As a Lead Android Engineer, you will own the technical direction of our Android platform, set engineering standards, and mentor a team of engineers while remaining hands-on with the codebase. You will drive architecture decisions, ensure scalability and performance, and partner with product and cross-functional leadership to shape the mobile roadmap.

• Define and own the technical vision, architecture, and long-term roadmap for the Android platform.

• Lead, mentor, and grow a team of Android engineers; set coding standards and review practices.

• Make high-impact architectural decisions and drive modularization/scalability across the codebase.

• Own CI/CD strategy, release management, and deployment reliability.

• Partner with product and design leadership to translate business goals into technical execution.

• Establish observability, performance budgets, and quality gates.

• Remain hands-on: contribute to critical features and complex problem-solving.

• 8+ years of Android development experience, including 2+ years in a lead or tech-lead capacity.

• Proven track record shipping and scaling B2C subscription-based apps at significant user volume.

• Deep expertise in Kotlin, coroutines/Flow, and advanced language features; ability to set idiomatic standards across a team.

• Mastery of Google Play Billing at scale, subscription monetization architecture, entitlement validation, RTDN pipelines, paywall experimentation, and pricing/offer strategy.

• Strong architectural leadership: large-scale multi-module Gradle architectures, build optimization, design systems, and cross-team API contracts.

• Experience owning CI/CD at scale (GitHub Actions, Bitrise, Gitlab CI), automated release trains, staged rollouts, and signing/key management.

• Deep performance engineering: startup optimization, Baseline Profiles, memory/jank diagnosis, and R8/ProGuard optimization.

• Comprehensive testing strategy ownership: unit, UI (Compose/Espresso), and integration testing with meaningful coverage goals.

• Experience integrating AI-driven product features and championing AI-assisted development practices across a team.

• Strong technical leadership, mentorship, stakeholder communication, and cross-functional collaboration skills.

Ruby Labs operates within the CET (Central European Time) zone. Applicants from any country are welcome to apply for the position as long as they are located within approximately ± 4 hours of CET. This ensures optimal collaboration and communication during working hours.

Discover the perks of being part of our vibrant team! We offer:

• Remote Work Environment: Embrace the freedom to work from anywhere, anytime, promoting a healthy work-life balance.

• Unlimited PTO: Enjoy unlimited paid time off to recharge and prioritize your well-being, without counting days.

• Paid National Holidays: Celebrate and relax on national holidays with paid time off to unwind and recharge.

• Company-provided MacBook: Experience seamless productivity with top-notch Apple MacBooks provided to all employees who need them.

• Flexible Independent Contractor Agreement: Unlock the benefits of flexibility, autonomy, and entrepreneurial opportunities. Benefit from tax advantages, networking opportunities, reduced employment obligations, and the freedom to work from anywhere. Read more about it here: https://docs.google.com/document/d/1nkrN76JlZkbKj9WSOhlT1_mni_CZeDkHdwfIjPXVwvk/preview?tab=t.0#heading=h.ndsdl4wapxtt

Be part of our fast-growing team and seize this excellent opportunity for personal and professional growth!

After submitting your application, we conduct a thorough review which typically takes 3 to 5 days, but may occasionally take longer due to the volume of applications received. If we see a potential fit, we proceed with the following steps:

• Recruiter Screening (40 minutes)

• Technical Interview (90 minutes)

• Technical Interview (60 minutes)

• Final Interview (60 minutes)

At Ruby Labs, we move fast, aim high, and expect the same from our team. We’re not here to play small—we’re here to build, grow, and win. That means we look for people who are ambitious, driven, and ready to give their best every single day.

This is a place for individuals who thrive under pressure, embrace challenges, and see opportunity in every obstacle. If you’re hungry to achieve, motivated by impact, and want to grow at the speed of your own ambition, Ruby Labs offers the platform to make it happen.

Here, effort is matched with reward. We recognize those who go all in and deliver results, and we create space for people who want more—more responsibility, more growth, and more success.

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