Senior Backend Developer, C#, Python

Jobtailor; Poznań; On-site; PLN 180,000 - 300,000; Full time

Job summary

apoQlar is seeking a backend engineer to design, build and operate backend services in C#/.NET and Python, powering our HoloMedicine XR platform. You will develop APIs, data pipelines and integration services critical to real-time clinical workflows.

You will work with medical imaging formats (DICOM/DICOMweb/NIFTI), containerize with Docker/Kubernetes, and use CI/CD and Argo Workflows. Collaboration with XR engineering, clinical stakeholders and Quality/Regulatory is essential to maintain EU MDR

Qualifications

• Backend development experience in C#/.NET and Python.
• Experience with API design, distributed systems and data modeling.
• Hands-on with Docker and Kubernetes; cloud experience a plus.
• Knowledge of medical imaging: DICOM, DICOMweb, FHIR, NIFTI.
• Fluent in English; German a plus.
• Experience with regulated medical software (EU MDR, IEC 62304, ISO 13485, ISO 14971).
• CI/CD, testing and code quality practices.
• Familiar with real-time data streams (WebRTC).
• Observability tools: Grafana/Prometheus/Loki.
• XR/AR/VR familiarity or clinical environment exposure.

Responsibilities

• Design, build and operate backend services in C#/.NET and Python.
• Develop APIs, data pipelines and integration services for medical imaging workloads.
• Support real-time data flows to XR clients with reliability and low latency.
• Containerize and ship services via Docker/Kubernetes; leverage Argo Workflows and CI/CD.
• Build observability and security through logging, metrics and SBOM hygiene.
• Ensure compliance with EU MDR, IEC 62304 and ISO 13485.
• Code review, mentoring and shaping backend architecture.
• Collaborate with XR engineering, clinical stakeholders and Quality/Regulatory.
• Support the software powering apoQlar’s HoloMedicine platform.

Skills

C#/.NET Backend Development

Python Programming

API Design

Distributed Systems

Data Modeling

Cloud Experience

Relational/Document Databases

Async Messaging

CI/CD Testing

Medical Imaging Knowledge

Fluent English

German (Nice to have)

Regulated Medical Software Knowledge

WebRTC/Real-time Streaming (Nice to)

XR/AR/VR Exposure (Nice to)

Education

N/A

Tools

Docker

Kubernetes

Argo Workflows

CI/CD Tools

Grafana

Prometheus

Loki

Dependency-Track

Trivy

CycloneDX

Job description

• Design, build and operate backend services in C#/.NET and Python, including APIs, data pipelines and integration services
• Work on medical imaging backends using DICOM/DICOMweb and NIFTI
• Support real-time data flows to XR clients, focusing on reliability, latency and session stability
• Containerize and ship services via Docker/Kubernetes, including workflow orchestration such as Argo Workflows and CI/CD
• Build observability and security through structured logging/metrics and SBOM/SOUP hygiene
• Maintain compatibility with EU MDR, IEC 62304 and ISO 13485 requirements, risk linkage and traceability
• Review code, mentor peers and help shape backend architecture and engineering standards
• Collaborate with XR engineering, clinical stakeholders and Quality/Regulatory
• Build software powering apoQlar’s HoloMedicine® Mixed and Augmented Reality medical platform

Requirements

• Several years’ professional experience building backend services in C#/.NET
• Solid working command of Python
• Strong grasp of API design, distributed systems and data modeling
• Ability to reason about architecture, trade-offs and performance as a peer
• Hands-on experience with Docker and Kubernetes; cloud experience is a plus
• Comfortable with relational and/or document databases, async messaging and integration patterns
• Pragmatic approach to testing, CI/CD and code quality
• Knowledge of medical imaging, DICOM, DICOMweb, FHIR and NIFTI
• Fluent in English
• German is a plus
• Experience with regulated medical software such as EU MDR, IEC 62304, ISO 13485 and ISO 14971 is nice to have
• Real-time media/streaming experience with WebRTC and TURN/ICE is nice to have
• Familiarity with Grafana/Prometheus/Loki and Dependency-Track, Trivy and CycloneDX is nice to have
• Exposure to XR/AR/VR platforms or a clinical environment is nice to have

Core Competencies

Demonstrates expertise in building and operating backend services using C#/.NET and Python, with a strong focus on API design, data pipelines, and compliance with medical software regulations. Proficient in containerization and orchestration using Docker and Kubernetes, while ensuring software quality and observability.

Highest-signal resume keywords

• C#/.NET Backend Development
• Python Programming
• API Design
• Docker/Kubernetes
• Medical Imaging Knowledge

ATS Optimization Keywords

Hard Skills

• C#
• Python
• API Design
• DICOM
• DICOMweb
• NIFTI
• CI/CD
• Data Modeling
• Real-Time Data Flows
• Testing

Soft Skills

• Mentoring
• Collaboration
• Problem-Solving

Certifications & Qualifications

• EU MDR
• IEC 62304
• ISO 13485
• ISO 14971

Industry Keywords

• Medical Imaging
• XR
• AR
• VR
• Clinical Environment

Tools & Technologies

• Docker
• Kubernetes
• Grafana
• Prometheus
• Loki
• Dependency-Track
• Trivy
• CycloneDX