Senior Android Engineer

Who Are We?

We are Welltech — a global company with Ukrainian roots and a powerful mission: to move everybody to start and stay well for life. Today 25.5 million users have trusted Welltech to help them build healthy habits — a testament to the real value our innovative, engaging wellness solutions deliver every day. 🌍

With five hubs across Cyprus, Ukraine, Poland, Spain and the UK and a diverse, remote-friendly team of 700+ professionals, we continue to scale rapidly. Our innovative apps — Muscle Booster, Yoga-Go and WalkFit — empower millions to transform their lifestyles and unlock their personal wellness journeys.

Welltech is where your impact becomes real. And our values clearly attest to that: we grow together, we drive results, we lead by example and we are well-makers.

If this looks like you and you thrive in a fast-paced environment, you’ll fit right in at Welltech. Let’s build wellness for millions together.

What We're Looking For

We are seeking a highly skilled and product-focused Senior Android Engineer with demonstrated expertise in Domain-Driven Design, cross-functional product development, and Developer Productivity. In this position, you will collaborate closely with our Product, Engineering, and Data teams to support the continued development and enhancement of our applications. You will support iterative development methods and promote data-driven decision-making to ensure high-quality and effective solutions.

Key responsibilities:

• Co-own and take technical ownership of the team’s codebase and production systems, ensuring stability, scalability, and long-term maintainability

• Lead the design and development of high-quality, performant, and maintainable mobile solutions with a strong focus on architecture and best practices

• Drive end-to-end delivery by translating complex user and product needs into robust technical solutions, from discovery through production

• Shape the architecture and system design of the mobile application and its integrations with backend and platform services

• Actively influence technical direction and raise engineering standards through code reviews, design discussions, and knowledge sharing

• Collaborate cross-functionally with backend, frontend, security, infrastructure, and product teams to align on technical solutions and platform strategy

• Serve as a trusted technical partner for product and design, contributing to roadmap discussions and technical decision-making

• Mentor and support other engineers, fostering technical growth and a culture of ownership and excellence

• Work hands-on with a modern Android stack, including Kotlin, Coroutines and Flow, Jetpack Compose, and Jetpack libraries (Architecture Components, Navigation, DataStore, Room, Hilt, etc.)

• Identify opportunities for technical improvements and proactively drive initiatives that improve system quality, developer experience, and user impact

• Deliver high-impact features in a customer-centric environment, taking responsibility for outcomes that affect millions of users

Required skills:

• Solid experience with Kotlin, including fundamentals like coroutines, networking, persistence, and performance optimization

• Experience with Jetpack Compose and modular, scalable UI architectures

• Excellent understanding of architectural patterns (MVVM, MVI, DI) and modular codebases

• Ability to manage risks, trade-offs and propose efficient solutions

• Experience with design for testability, automated tests and willingness to work in an environment where engineers own the quality end-to-end

• Strong ability to design for reliability, scalability, and performance

• Experience working with CI/CD pipelines and tooling (e.g., Bitrise, Fastlane, Gradle, custom scripts)

• Strong advocate of design for testability, automated testing, and shift-left quality mindset

• Product-minded approach with a bias for pragmatic, maintainable solutions

Nice to have:

• Experience with backend-driven UI

• Experience with data and/or multimedia

• Hands-on experience with OWASP mobile security best practices

• Experience implementing and advocating for methodologies that support fast iteration and high dev productivity (e.g. eXtreme Programming, Trunk Based Development, CI/CD mindset, BDD, TDD)

Candidate journey: ⭕️ Recruiter call

✨ Why You’ll Love Being Part of Welltech:

• Grow Together: Join a culture that champions both personal and professional growth. Here, you’ll thrive as we learn, evolve, and succeed together.

• Lead by Example: No matter your role, your leadership matters. Every team member is empowered to inspire and make an impact.

• Results-Driven: We’re all about achieving meaningful outcomes. It’s not just about the effort, but the difference we make every day.

• We Are Well-Makers: Be part of a movement that’s creating a healthier, happier world. Together, we make well-being a reality!

Check out some of our products

Muscle Booster — https://musclebooster.fitness/

Yoga-Go — https://yoga-go.io/

WalkFit - http://walkfit.pro