Senior C# Developer

Project description: Our team develops and maintains custom software supporting healthcare operations and clinical workflows. The platform includes backend APIs, system integrations, data-processing services, and AI-enabled applications. Our current applications are primarily written in Python using FastAPI, Pydantic, PyTorch, and medical-imaging libraries.

The platform runs in a containerized AWS environment using services such as Lambda, ECS, SageMaker, API Gateway, S3, SQS, EventBridge, DynamoDB, and CloudWatch. We use Microsoft SQL Server for relational data, Docker for local development and packaging, AWS SAM and CloudFormation for infrastructure as code, and GitHub Actions for CI/CD.

We are expanding our stack by taking ownership of additional applications written in C# and .NET. The role will focus on maintaining and modernizing these applications, developing new capabilities, and integrating them with our existing Python and AWS platform. Reliability, security, observability, and maintainability are key priorities across all our systems.

Industry: Healthcare

Location: Kraków / Hybrid/ Remote from Poland

Team & Collaboration

• 4 from Montrose including 2 developers, 1 SRE and a QA + 2 on the client’s side (PM + Architect)
• Regular meetings:
  • daily standups
  • biweekly sprint planning
  • weekly refinements
  • weekly stakeholder meeting with people from the clinic
• Communication via email and Webex chat
• Working hours: usually 9:30–17:30 CET

• Taking ownership of existing C#/.NET applications and developing new backend services, APIs, and integrations
• Maintaining and modernizing applications while ensuring compatibility with existing workflows
• Integrating C# services with our Python, FastAPI, SQL Server, and AWS-based platform
• Building and supporting containerized, event-driven services using Docker and AWS
• Investigating production issues through debugging, monitoring, and log analysis
• Writing automated tests and improving application reliability, security, and performance
• Participating in code reviews, architecture discussions, and continuous technical improvements
• Collaborating with team members and stakeholders to translate requirements into maintainable software
• Using GitHub, GitHub Actions, and infrastructure-as-code tools for development and CI/CD

• Strong knowledge of C# and .NET
• Experience developing RESTful APIs and backend services
• Experience working in Linux environments
• Experience with AWS and cloud-based applications
• Familiarity with Python
• Experience with Microsoft SQL Server
• Knowledge of Git and collaborative development workflows
• Familiarity with Docker and containerized applications
• Strong debugging, testing, and problem-solving skills

• Healthcare or other regulated-industry experience
• Familiarity with medical imaging

• Technical screening call via Google Meets (~ 30 minutes)
• Technical interview via Google Meets (~ 2 hours)
• Non-technical conversation with a member of our Recruitment Team (~ 45 minutes)
• Client interview (30–90 minutes) – this is a standard part of our recruitment process, giving you the opportunity to meet the client you'll be working with.