Senior Backend Engineer (all genders) - Building Scalable AI Systems

Join us at dnl and help shape the backend of a truly developer-focused platform.

We’re building Germany's leading AI-powered tools that analyse financial and non-financial reports.

Using state-of-the-art machine learning technologies, we extract key figures from annual financial statements - fully automatically and transparently.

Tasks

Short-term: Skill Building & Impactful Contributions (0-3 months)

• Write clean, scalable backend code and design components that enhance performance and responsiveness.
• Perform rigorous testing and debugging to ensure high system reliability.
• Integrate machine learning models into product features to push the boundaries of what’s possible.

Mid-term: Specialization & Ownership (3-6 months)

• Develop expertise in a focus area that supports both your professional growth and DNL’s mission.
• Initiate and lead a meaningful project or feature that has a measurable impact.
• Experience mentoring or guiding other developers, formally or informally, and an interest in shaping team culture.
• Design and maintain RESTful APIs and real-time communication systems using WebSockets.
• Continuously refine the codebase, introduce security improvements, and help prioritize new features.

Long-term: Leadership & Strategy (6-12 months)

• Influence architectural decisions and guide technology choices that shape our products.
• Align tech efforts with business strategy by developing a strong understanding of product needs.
• Take an active mentoring role - lead code reviews, set best practices, and help scale our engineering processes.

Requirements

Education & Experience : A degree in Computer Science, Engineering, or a similar field, and at least 5+ years of professional backend experience (or equivalent proven expertise) of hands-on experience as a Python backend developer.

Frameworks : Solid knowledge in building microservices using Flask, FastAPI, or similar tools. You're confident with writing tests using pytest and comfortable building robust test suites.

Technical Skills : Proficient with CI/CD pipelines and cloud deployment, preferably on Azure with Kubernetes. Bonus points for experience in machine learning or theoretical foundations. You’ve worked extensively with scalable microservice and event-driven architectures.

Leadership : Strong communication skills and a collaborative mindset; you enjoy helping others grow while driving technical excellence.

Benefits

• Above-Average Compensation : We offer a competitive salary above market average, reflecting the impact and expertise we value as well as meaningful equity.
• Monthly Perks (Germany-based) : If you're employed in Germany, you’ll receive a €50 monthly voucher usable at over 50 popular stores—covering everything from groceries to lifestyle.
• Learning budget: To foster your professional development, we provide financial support for conferences and continuing education courses.
• Innovative Work Culture : A collaborative startup environment with flat hierarchies, fast decisions, and space for your ideas.
• Great People : Work alongside an international team of passionate and driven professionals.
• Time Off : 30 vacation days per year to recharge and explore.
• Remote Flexibility : Work from anywhere within Europe and participate in optional Berlin meetups.
• Flexible Hours : Adapt your schedule to your personal rhythm and lifestyle.
• Top Equipment : We'll provide you with the latest hardware to do your best work.

We are looking forward to your application and getting to know you! :)