Python Software Engineer (all) - Mid-level

Permanent employee, Full-time · Berlin, Remote, Luxembourg, Hamburg

Let me introduce...

With Sonia, doctors are successful doctors. We create and deploy AI-enhanced solutions that make doctors’ lives easier, patients’ care better, and healthcare systems more efficient. If you’re an intrinsically motivated self-starter who values impactful work, join us in revolutionizing healthcare.

We’re looking for a Python Software Engineer (all) to help us build scalable, reliable backend services and APIs for our AI-driven products. You’ll work closely with our engineering and ML teams to design and implement robust systems for real-time communication, data processing, and automation—always with code quality, performance, and maintainability as your guiding principles.

This role can be performed in a hybrid setup from our offices in Luxembourg or Berlin, or remotely from anywhere in Germany or Luxembourg.

This is what you’ll own

Develop and maintain scalable backend services using Python 3 (with async and strong typing)
Design and implement RESTful APIs and real-time communication via WebSockets
Write clean, maintainable, and well-tested code following best engineering practices
Debug and troubleshoot production issues to ensure reliability and performance
Work with containerization (Docker) and contribute to CI/CD pipeline improvements
Collaborate with cross-functional teams to integrate APIs and backend systems with ML services
Proactively bring in ideas for improving architecture, automation, and processes

You’ll thrive in this role if you bring

3+ years of professional experience in software development with Python 3
Strong knowledge of asynchronous programming and type hinting in Python
Experience with at least one web framework (FastAPI, Django, or Flask)
Proven experience in building and consuming RESTful APIs
Working experience with real-time communication using WebSockets (Socket.IO, FastAPI WebSockets, etc.)
Familiarity with version control systems (Git, GitLab, Bitbucket)
Practical knowledge of testing frameworks and debugging in production environments
Experience with containerization (Docker) and basic CI/CD concepts
Solid understanding of software engineering principles, design patterns, and clean code practices

Nice-to-Haves

Experience working with LLMs (routing, parsing, error handling, guardrails)
Knowledge of message brokers (RabbitMQ, Kafka, Redis Pub/Sub)
Exposure to NoSQL databases (Redis)
Familiarity with DevOps tools or Kubernetes environments
Contributions to open-source projects

Why you’ll love working with us

Full ownership of critical backend components in a fast-growing AI environment
A team that values curiosity, learning, and pragmatic problem-solving
Flexible working arrangements
Competitive salary depending on experience
Work on products that directly impact healthcare innovation

Ready to apply?

If you're passionate about web development and want to work with cutting-edge technologies, we'd love to hear from you!
I'm Margarita and will be guiding you through the application process.

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About us

At Sonia, we’re building more than just a product — we’re building a team that helps doctors succeed with the power of AI. To grow and shape the future of healthcare, we’re looking for people who want to create, challenge, and collaborate — and have fun while doing it.

We believe teams thrive when different perspectives come together and work toward a shared goal. We welcome and respect everyone for who they are, regardless of origin, gender, age, religion, disability, or sexual identity. We’re excited to meet people from all backgrounds who want to bring their unique perspective to our mission.

Are you in?

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