Engineer II, Kotlin (Fintech Financial Services)

As an Engineer II, Kotlin at our Fintech company, your primary responsibilities include developing scalable backend systems, defining software architecture, and taking ownership of the development lifecycle. You'll collaborate with product managers and various stakeholders, ensuring that product requirements are effectively translated into technical designs. Your work will involve implementing and maintaining REST APIs and microservices, all while delivering solutions that empower millions.

To qualify for the Engineer II, Kotlin position at our fintech company in Berlin, you should have a minimum of 3 years of experience with Kotlin/Java and distributed systems in large-scale applications. You need proficiency in building REST APIs, microservices, and experience with cloud platforms like AWS or GCP. Familiarity with SQL and NoSQL databases, design patterns, and software architecture is also crucial to excel in this role.

In the Engineer II, Kotlin role at our Fintech company, you’ll be a part of a diverse and dynamic team that values collaboration and creativity. Our team members come together to share insights, solve problems creatively, and enhance their technical skills while working on innovative projects. We foster an environment where everyone is encouraged to contribute, learn, and grow as we tackle exciting challenges in the fintech space.

The Engineer II, Kotlin role offers a variety of opportunities for advancement within our fintech company. With a solid focus on personal and professional development, we provide ongoing educational budgets, access to online courses, and various resources to help you grow in your career. As you develop your skills in software architecture and fintech solutions, you may take on leadership roles or transition into specialized areas within our organization.

In the Engineer II, Kotlin position at our Fintech company, we prioritize work-life balance. Our hybrid working model allows you to work in our beautiful Berlin office two days a week, ensuring face-to-face collaboration while still offering flexibility. Additionally, we provide 27 vacation days and various wellness benefits to support your overall well-being, helping you maintain a healthy work-life equilibrium.

When answering this question, share specific examples of projects where you utilized Kotlin, focusing on your role, the challenges faced, and the outcomes achieved. Highlight your familiarity with its features, such as null safety, coroutines, and language interoperability, to emphasize your hands-on experience.

Discuss your methodology for defining software architecture, including how you gather requirements, risk analysis, and selecting appropriate design patterns. Mention any tools or frameworks you prefer, and emphasize your ability to communicate and collaborate with stakeholders to refine architectural designs aligned with project goals.

Use the STAR (Situation, Task, Action, Result) format to structure your response. Describe the context of the bug, your role in addressing it, the steps you took to resolve it, and what you learned from the experience, highlighting your problem-solving skills and technical expertise.

Explain the strategies you use for building scalable and reliable REST APIs, including design principles such as statelessness, caching, and versioning. Share your experience with load testing, monitoring, and maintaining the APIs, along with any tools you've used to manage performance and reliability.

Discuss your experience with cloud platforms like AWS or GCP, mentioning specific services you've utilized, such as EC2, Lambda, or Cloud Functions. Share examples of how you used cloud services to optimize deployment, manage infrastructure, or implement continuous integration and delivery pipelines in your projects.

Delve into your experience with microservices, including the advantages they offer and the challenges faced in managing a microservices architecture. Provide examples of how you've implemented microservices in past applications, focusing on inter-service communication, data management, and orchestration.

Mention specific design patterns you frequently use, such as Singleton, Factory, or Observer. Provide context around how you’ve applied these patterns in your work, explaining how they helped solve design challenges and contributed to cleaner, more maintainable code.

Outline your strategy for testing, sharing your experience with unit tests, integration tests, and functional tests. Mention any frameworks or tools you utilize and emphasize the importance of automated testing in ensuring code quality and reliability throughout the development lifecycle.

Talk about the resources you use to stay informed, such as tech blogs, podcasts, and online courses. Describe your participation in developer communities and your personal projects, emphasizing how continuous learning contributes to your growth and adaptability in the fast-evolving tech landscape.

Share your personal insights on what excites you about working in the fintech industry, focusing on aspects like innovation, problem-solving, and the impact of technology on financial services. Discuss how your passion aligns with the mission of providing valuable financial solutions to customers.