Senior Mobile Engineer

About Stark

Stark builds the worlds most powerful electric motorcycles. From the VARG MX to the road-legal VARG EX & SM our bikes have won world championships and are engineered to outperform anything with a combustion engine.

Were based in Sant Boi Barcelona growing fast (77% year-on-year) and building a team that will take us even further. If you want to work on a product that people are genuinely obsessed with this is it.

Stark will become the global market leader in premium motorcycles. Building premium motorcycles requires innovation and we need your help to make us succeed in building the backend for our AI systems.

Our mission is to lead the way towards a sustainable motorcycle industry by reducing plastic and CO2 pollution.

This will be achieved by building sustainable products that are superior to traditional technology in terms of Performance Emotion and Design.

The Role

Stark shall become the global market leader in premium motorcycles. Building premium motorcycles requires innovation and we need your help to make us succeed in building the first vehicle smart display that runs on an Android phone that can be used to adjust several settings of the bike such as the engine power.

We want to provide our customers with an incredible user experience while connecting to the bike adjusting the vehicle settings or buying other products with the display.

This is one of Starks most ambitious projects and one crucial step towards being a game-changer in the industry.

What Youll Do

• Own the architecture and technical direction of the Android application making pragmatic decisions that balance quality performance and speed

• Take end-to-end ownership of mobile features: from definition and design through development release and monitoring

• Diagnose and resolve complex performance memory and stability issues with a deep understanding of multithreading concurrency and data caching

• Collaborate with product managers designers and business stakeholders to turn requirements into polished user-centric experiences

• Foster a culture of continuous improvement challenge what could be better share mistakes openly and lead by example

Duties

• Be a core member of a high-performance multidisciplinary team contributing expertise openly in technical and product discussions

• Set and uphold standards for clean stable and extensible code across the mobile team

• Drive best practices in architecture testing CI/CD and tooling

• Leverage AI tools as a standard part of your development workflow to ship faster and with higher quality

• Partner with other engineering teams to co-design features across the stack

• Stay current with mobile industry trends and proactively propose product improvements

• Use data to drive decisions A/B testing feature flags and experimentation frameworks to measure and validate impact

• Be a role model to team members

• Keep your backlog up to date and communicate frequently with engineers product managers and the creative team

What you will bring to Stark

• 5 years of experience leading Android application development with a track record of shipping production apps at scale

• Deep proficiency in Kotlin Jetpack Compose and modern Android development practices

• Strong command of Android architecture patterns (MVVM MVI Clean Architecture) and the ability to evolve them pragmatically

• Solid understanding of concurrency coroutines flows and performance optimisation

• Experience diagnosing and resolving complex performance memory and stability issues

• Broad knowledge of the Android SDK including best practices Jetpack libraries and key third-party APIs

• Strong testing mindset unit integration and UI testing as part of normal development

• Data-driven approach to product development: A/B testing feature flags and experimentation frameworks

• Ability to manage and prioritise multiple workstreams simultaneously

• Proficient in English written and spoken

Nice to have

• Experience with Kotlin Multiplatform

• Experience with Bluetooth

• Experience in improving Developer experience (CI/CD Git strategies)

Why work with us

• The chance to work on a product people are genuinely passionate about

• A fast-growing company with real momentum

• A creative international team based in Barcelona

• Competitive salary and benefits package

• Direct access to riders race teams and the product this is not a remote-from-the-product role

• Subsidized lunch in our in house restaurant

• Free access to our in-house gym (including weekends!)

• 30 days of paid vacation

At Stark we dont just accept differencewe celebrate it we support it and we thrive on it for the benefit of our employees our products and our community.

We are committed to creating an inclusive environment where everyone regardless of gender identity sexual orientation race religion age neurodiversity or disability feels a true sense of belonging. We believe that diverse teams make better decisions and that a culture of equity is a prerequisite for innovation.

Accessibility: If you require any reasonable adjustments during the application or interview process (such as assistive technology extra time or a specific format) please let us know at We are here to support you.

We encourage applications from underrepresented groups and are excited to see how your unique perspective can help us grow