Senior Android Engineer (Platform)

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

This is a unique opportunity to build a platform from scratch, setting company-wide standards and driving the direction of our mobile technology. In the Mobile App Platform team, you will architect our next-gen mobile platform, directly shaping how millions experience wellness. You will design and implement core platform solutions, empowering product teams to rapidly build and customize applications. You will also own the mobile infrastructure blueprint, enabling teams to focus on features and experiments, free from underlying infrastructure concerns. This role demands a strong problem-solver who thrives on building, as you'll define a platform that scales to millions, creating a lasting legacy in mobile wellness.

Key responsibilities:

• Help build and evolve scalable mobile infrastructure, tooling, and shared components to support multiple Welltech mobile apps

• Contribute to libraries, SDKs, and CI/CD pipelines that improve developer experience and apps quality

• Work closely with product teams to support the adoption of platform solutions

• Write clean, testable, and performant code with an eye on maintainability

• Support modularization, reusability, and standardization efforts across mobile apps

• Identify common problems across apps and solve them in a consistent, scalable way

• Participate in code reviews, documentation, and knowledge sharing within the team

• Collaborate cross-functionally with backend, frontend, security, and infrastructure teams to enable seamless integration and platform alignment

Required skills:

• Solid Android development 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

• Proven ability to craft clean, maintainable, and scalable code

• 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

• Passion for improving developer experience and shipping high-quality code

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

Nice to have:

• Experience with backend development

• Experience with backend-driven UI

• Hands-on experience with OWASP mobile security best practices

• Track record of building internal tools, shared components, or platform features at scale

• 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: ⭕️ HR call ---> ⭕️ Live Code Review ---> ⭕️ System Design ---> ⭕️ Cultual fit interview

✨ 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