Senior Python Software Engineer (all)

Department: AI

Employment Type: Permanent employee

Schedule: Full-time

Seniority: Experienced

Location: Berlin, Remote, Luxembourg, Hamburg, Frankfurt

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 Senior Python Software Engineer (all) to take ownership of critical backend components in our AI-driven products. You’ll design and implement scalable architectures, mentor others, and ensure our systems are robust, reliable, and future-proof. Partnering closely with engineering and ML teams, you’ll build APIs and services that enable real-time communication, data processing, and automation at scale—always with clean, maintainable, and high-performing code.

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

• Backend Development: Design, development, and maintenance of scalable backend services using Python 3 (async, type hinting).
• API Architecture: Architect and implement RESTful APIs and real-time communication via WebSockets.
• Technical Leadership: Drive technical discussions and decisions, shaping backend architecture and coding standards.
• Production Reliability: Debug and troubleshoot production issues, ensuring resilience, performance, and security.
• DevOps: Advance our CI/CD pipeline and containerized deployments (Docker).
• AI/ML Integration: Collaborate with ML engineers to integrate APIs and backend systems with AI/ML services.
• Mentorship & Quality: Mentor and support other developers, fostering best practices in engineering, testing, and documentation.
• Continuous Improvement: Continuously identify opportunities for technical and process improvements.

• Experience: 8+ years of professional experience in software development with Python 3.
• Python Expertise: Deep knowledge of asynchronous programming, type hinting, and software design principles.
• Web Frameworks: Solid experience with web frameworks (FastAPI, Django, or Flask).
• Architecture: Proven track record of designing and scaling APIs and backend architectures.
• Real-Time Communication: Hands-on experience with real-time communication (WebSockets, Socket.IO, FastAPI WebSockets).
• DevOps Foundation: Experience with containerization (Docker) and CI/CD systems.
• Quality Assurance: Strong debugging and testing skills in production environments.
• Version Control: Expertise with version control (Git, GitLab, Bitbucket).
• Communication: Strong communicator with experience mentoring peers and leading projects.

• Generative AI: Experience working with LLMs (routing, parsing, error handling, guardrails).
• Data Flow: Knowledge of message brokers (RabbitMQ, Kafka, Redis Pub/Sub).
• Databases: Exposure to NoSQL databases (Redis).
• Container Orchestration: Familiarity with Kubernetes or advanced DevOps practices.
• Community: Contributions to open-source projects.

• Full ownership of impactful backend components in a fast-growing AI environment.
• A collaborative team that values curiosity, learning, and pragmatic problem-solving.
• Flexible working arrangements (remote or hybrid).
• 30 days of annual vacation.
• Competitive salary depending on experience.
• The chance to work on products that directly shape the future of healthcare.

If you’re passionate about backend engineering and want to make an impact in healthcare with cutting-edge AI technologies, we’d love to hear from you!

I’m Margarita and will be guiding you through the application process.