Senior Backend Developer (mfd) C# & Python HoloMedicine Platform

apoQlar builds Mixed and Augmented Reality software for medicine with the HoloMedicine platform - a certified medical device (EU MDR IEC 62304 ISO 13485). Behind the spatial experience on the headset sits a backend that ingests medical imaging orchestrates clinical workflows and streams data to XR devices in real time. We are a small focused team working directly with clinics and partners such as the Mayo Clinic.

Location Hamburg/Hybrid or Poznan/Hybrid

As Senior Backend Developer you own the services that power HoloMedicine behind the scenes: imaging pipelines clinical orchestration (e.g. our Tumor Board management plane) real-time streaming and the platform APIs that XR clients depend on. You write production-grade C# and Python make sound architectural calls and keep everything traceable and release-ready in a regulated environment - working closely with XR engineering clinical stakeholders and Quality/Regulatory.

• Design build and operate backend services in C# / .NET and Python - APIs data pipelines and integration services
• Work on medical imaging backends: DICOM / DICOMweb NIFTI handling
• Support real-time data flows to XR clients - reliability latency and session stability
• Containerize and ship via Docker / Kubernetes including workflow orchestration (e.g. Argo Workflows) and CI/CD
• Build for observability and security from day one: structured logging/metrics (Grafana / Prometheus / Loki) SBOM/SOUP hygiene (Dependency-Track Trivy CycloneDX)
• Keep work compatible with MDR / IEC 62304 / ISO 13485 - requirements risk linkage and traceability in alignment with Quality/Regulatory
• Review code mentor peers and help shape backend architecture and engineering standards

Must-have

• Several years professional experience building backend services in C# / .NET plus solid working command of Python
• Strong grasp of API design distributed systems and data modeling you can reason about architecture trade-offs and performance as a peer
• Hands-on with containers and cloud (Docker Kubernetes; Cloud a plus)
• Comfortable with relational and/or document databases async messaging and integration patterns
• Pragmatic about testing CI/CD and code quality
• Knowledge of medical imaging / DICOM / DICOMweb / FHIR / NIFTI
• Fluent in English; German is a plus

Nice-to-have

• Experience with regulated medical software (EU MDR IEC 62304 ISO 13485 ISO 14971)
• Real-time media / streaming experience (WebRTC TURN/ICE)
• Familiarity with observability stacks (Grafana/Prometheus/Loki) and SBOM/security tooling (Dependency-Track Trivy CycloneDX)
• Exposure to XR/AR/VR platforms or a clinical environment