Senior Mobile Developer; Android + iOS

You will work closely with our development team to design, develop, and maintain high-quality mobile applications for Android and iOS.

You will work in a cross-functional team of product owners, software developers, UX experts, who develop the MOQO software platform and take part in the agile development process on a senior level. We believe that we will experience mobility completely differently in the future. At MOQO, we empower our clients to operate efficient car or bicycle sharing services. Our technology enables Mobility-as-a-Service, making flexible vehicle access simple for users and helping shape a more sustainable future of mobility.

• At least 5 years of professional experience as a mobile developer, working on production systems with real users.
• Strong, hands-on expertise in native Android development - Kotlin, the modern Android SDK, Jetpack, and Jetpack Compose.
• Openness and willingness to contribute to native iOS development (Swift); prior iOS experience is a plus, but a genuine cross-platform mindset matters more than deep iOS history.
• Solid understanding of software architecture and design principles (SOLID, clean, testable code) with a focus on maintainability, scalability, and long-term ownership.
• Good knowledge of the latest features and updates of the Android SDK, and an eye on the wider mobile ecosystem (including iOS).
• You work with AI coding agents on real codebases: you break the work down, review every diff, and notice when the model is confidently wrong. You can also say where you deliberately keep AI out of the loop.
• You are comfortable with code archaeology: reading unfamiliar legacy code, working inside migrations that are already in flight, and judging what is better left untouched.
• Familiarity with mobile UI/UX design principles and guidelines, and the judgment to implement intuitive interfaces well.
• Inherent software quality-, scalability-, and ownership-mindset.
• Motivation for continuous learning and a willingness to share knowledge and mentor others.

• Work independently and take technical ownership while collaborating within the agile development process.
• Develop and maintain our native mobile applications using native technologies, primarily on Android and on iOS as needed.
• Own architecture and software design decisions for the mobile platform with a long-term perspective.
• Write clean, efficient, and maintainable code following best practices and coding standards.
• Refactor and improve the existing codebase, actively reducing technical debt.
• Leverage AI tooling daily to boost productivity, while keeping quality high.
• Work closely with UI/UX designers and the product team to implement intuitive user interfaces and experiences.
• Support code quality through reviews, testing, and knowledge sharing across the team.
• Set the bar for AI-assisted contributions in the team: review expectations, testing, and what gets merged.
• Stay up-to-date with the latest mobile development trends, tools, and technologies.

• The opportunity to work on an internationally used, large-scale, established production system with real users and a tangible impact on everyday mobility
• Shape the future of the platform by evolving the system toward a cleaner, more domain-oriented architecture and reducing technical debt
• A company culture that values code quality, ownership, and thoughtful technical decisions over quick fixes
• A motivated, cross-functional team that enjoys collaboration and knowledge sharing
• Flexible working setup, personal development budget, a laptop of your choice, team events, and drinks at the office
• Paid AI coding tools (Claude Code or the assistant you prefer) and the internal tooling we build around them, used daily across the team

We hire only within Germany and offer a fully remote setup. You can work from anywhere within Germany. Still, we believe that seeing each other in person makes working together easier and more meaningful. That's why we ask team members to come to our Aachen office occasionally for onboarding, team events, or special occasions giving us the chance to connect, collaborate, and build relationships beyond the screen.

This is also reflected in our contracts:
Aachen on paper, everywhere in reality

We're engineers, not data hoarders. Here's how we handle your application:

• Linked In:
  They handle the initial upload (and their own data rules).
• Our Stack:
  We'll likely store your CV in Google Workspace and discuss…