Senior Python Software Engineer - Remote

Overview

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.

In Short

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

Requirements

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

Benefits

• 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).
• Competitive salary depending on experience.
• The chance to work on products that directly shape the future of healthcare.