Software Engineer Backend (Kotlin/Java) - (Routing Infrastructure, Logistics Optimisation)

As a Software Engineer Backend (Kotlin/Java) at Delivery Hero, your primary responsibilities will involve owning and evolving services that are critical for building and providing courier routes. You'll be deeply engaged in the entire development lifecycle, from the initial specification to deployment and post-launch monitoring of applications in production. You'll work closely with your team to create solutions that enhance the delivery experience for our users.

To qualify for the Software Engineer Backend (Kotlin/Java) position at Delivery Hero, candidates should have at least 3 years of professional application development experience, strong proficiency in Kotlin or similar JVM technologies, and a solid understanding of microservices architecture. Experience with NoSQL databases and an ownership mentality towards software development and deployment are also essential for success in this role.

At Delivery Hero, a Software Engineer Backend can expect a collaborative and dynamic work environment that fosters creativity and innovation. Our hybrid working model promotes face-to-face connections in our beautiful Berlin campus, combined with remote flexibility. We focus on team success and support individual career growth through various programs and initiatives designed to enhance your professional development.

Delivery Hero is committed to supporting the career growth of a Software Engineer Backend through various initiatives. This includes an educational budget of €1,000 for courses and training, access to language courses, and a platform like Udemy Business, where you can explore an array of topics. Our supportive culture encourages continuous learning and development to help you achieve your professional goals.

As a Software Engineer Backend at Delivery Hero, you will enjoy a competitive benefits package, including 27 days of vacation that increase after your second and third years with the company. Additionally, you’ll have access to health checkups, gym subsidies, and digital meal vouchers. We also offer employee stock purchase plans, life insurance, and a corporate pension plan to ensure your financial well-being.

When addressing your experience with Kotlin during an interview, focus on specific projects where you utilized this language, highlighting your ability to leverage its features for backend development. Discuss how Kotlin's interoperability with Java and its concise syntax allowed you to build efficient and maintainable applications.

In your response, emphasize your understanding of scalable architecture principles, like microservices, and discuss specific techniques you've used, such as load balancing, caching, or database optimization. Mention how you monitor system performance and make iterative improvements through thorough testing and user feedback.

When discussing your coding practices, highlight your commitment to clean coding principles such as using meaningful naming conventions, keeping functions short and focused, and applying design patterns where appropriate. Explain how code reviews and collaboration within your team help maintain high-quality standards.

Focus on a specific incident in your past work, outlining the steps you took to identify, analyze, and fix the bug. Discuss how your technical skills and problem-solving mindset led you to a solution, and highlight any preventative measures you put in place to avoid similar issues in the future.

In your response, detail your familiarity with cloud platforms like AWS or Google Cloud, and explain the deployment processes you have followed. Discuss any containerization tools like Docker or orchestration tools like Kubernetes you’ve used to simplify deployment and manage application scaling effectively.

To answer this question, highlight your belief in the importance of communication and mutual respect within cross-functional teams. Share examples of how you have effectively collaborated with product managers, designers, and other engineers, ensuring diverse perspectives are valued throughout the development process.

Discuss tools and practices you use for monitoring applications, such as logging frameworks and APM tools. Elaborate on how you proactively manage system health post-deployment, including performance metrics, error tracking, and user feedback to guide ongoing improvements.

Describe microservices architecture as a design approach where an application is developed as a collection of loosely coupled services. Discuss its benefits, such as improved scalability, flexibility in technology choices, and easier maintenance through isolation of services, which allows for independent development and deployment.

When discussing API design, highlight principles like RESTful design, the importance of clear documentation, versioning strategies, and security measures such as authentication and authorization. Explain how adhering to these practices leads to a more user-friendly experience for developers integrating with your APIs.

Share your strategies for keeping knowledge current, such as following key industry blogs, participating in webinars, engaging with communities, and enrolling in online courses. Highlight how this ongoing learning translates into applying the latest technologies effectively in your work.