Senior Mobile Engineer

Stark Future SL; Barcelona; Presencial; EUR 70.000 - 100.000; Jornada completa

Ventajas ofrecidas por este puesto de trabajo

Competitive salary

In-house restaurant lunch

Gym access

30 days paid vacation

Direct access to riders & race teams

Barcelona-based team

Descripción de la vacante

Stark Future SL, based in Sant Boi near Barcelona, is building the world’s most powerful electric motorcycles. We are seeking an experienced Android lead to architect and own the mobile app, balancing quality, performance, and speed.

You will drive end-to-end features from concept to release, collaborating with product managers, designers, and business stakeholders. You will bring 5+ years of Android leadership, strong Kotlin/Jetpack Compose skills, and deep understandings of MVVM/MVI and

Formación

• 5+ years of experience leading Android applications
• Strong proficiency in Kotlin, Jetpack Compose, and modern Android practices
• Deep knowledge of Android architecture patterns (MVVM, MVI, Clean Architecture) and performance optimization
• Experience diagnosing complex performance, memory, and stability issues
• Data-driven mindset with experience using A/B testing and feature flags

Responsabilidades

• Own the architecture and technical direction of the Android application, balancing quality, performance, and speed
• Take end-to-end ownership of mobile features from design through release and monitoring
• Diagnose and resolve performance, memory, and stability issues with multithreading and data caching
• Collaborate with product managers, designers, and stakeholders to deliver user-centric experiences
• Foster a culture of continuous improvement and lead by example
• Drive standards for clean, stable, extensible code and CI/CD practices

Conocimientos

Android leadership

Kotlin

Jetpack Compose

MVVM architecture

Performance tuning

A/B testing

Herramientas

Android SDK

CI/CD

Git workflows

Kotlin Multiplatform

Descripción del empleo

About Stark

Stark builds the world’s 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. We’re based in Sant Boi, Barcelona, growing fast (77% year‑on‑year), and building a team that will take us even further. Our mission is to lead the way towards a sustainable motorcycle industry, by reducing plastic and CO₂ pollution.

Role Overview

Stark is developing the first vehicle smart display that runs on an Android phone, enabling customers to adjust several bike settings such as engine power. This is one of Stark’s most ambitious projects and one crucial step towards being a game‑changer in the industry.

What You’ll 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…)

Benefits

• 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
• Subsidised lunch in our in‑house restaurant
• Free access to our in‑house gym (including weekends!)
• 30 days of paid vacation

Equal Employment Opportunity

At Stark, we don’t just accept difference—we 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 [e-mail].