Mid Level Mobile Engineer (Flutter) (f/m/d)

CarOnSale is a start-up in the heart of Berlin. As a tech company, we have made it our mission to enable smooth digital processes in the automotive trade across Europe. Join us and develop new, innovative solutions for the B2B sector.

Your Tasks:

• Design, develop, and maintain high-quality, scalable client applications using Flutter and Dart for mobile platforms


• Collaborate with cross-functional teams, including product managers, designers, and other engineers, to deliver top-notch features and ensure seamless integration.


• Lead and mentor less experienced engineers, sharing knowledge and fostering a culture of continuous improvement and growth.


• Write clean, efficient, and testable code, adhering to established coding standards and best practices


• Troubleshoot, debug, and optimize application performance, providing an exceptional user experience


• Engage in code reviews, ensuring adherence to coding standards and offering constructive feedback to peers


• Stay up to date with the latest advancements in Flutter, Dart, and other relevant technologies to utilize the most effective tools and techniques

Your Profile:

• 3+ years of experience with Flutter and Dart.


• Demonstrated expertise in developing complex mobile applications with state management, networking, and UI/UX components.


• Strong knowledge of mobile app development best practices, including performance optimization, security, and accessibility.


• Experience with continuous integration, continuous deployment (CI/CD), and agile development methodologies.


• Excellent problem-solving skills, with the ability to break down complex issues and identify practical solutions.


• Strong communication and interpersonal skills, with the ability to work effectively with a diverse team.

Our benefits for you:

• First things first: From day 1 you will play a key role with us, because together with you we want to revolutionise the European automotive market.


• Growth and development: We focus on your development! Benefit from an attractive commission model, a comprehensive onboarding programme, regular feedback cycles and individual coaching sessions.


• Become a real COSie: Become part of our COS team and enjoy lots of fun, many great team events and our unique COS team spirit.


• We love diversification: Is diversity just as important to you as it is to us? Very good! A working atmosphere in which everyone feels comfortable and accepted for who they are is absolutely central to us.


• Your sword and shield: We provide you with a laptop and a mobile phone for your daily work


• Other benefits: We'll give you a ticket to Germany from day 1 and you'll also benefit from membership of Fitx or Urban Sports Club. And we also have attractive BaV.