Senior Backend .NET Developer – Digital Health

Twoday is the leading digital transformation partner in Northern Europe with a global presence. With approximately 3,000 specialists, we collaborate with some of the most admired private and public organisations to deliver cutting-edge digital solutions. Our expertise spans software engineering, Data & AI, cloud platforms, digital experiences and business applications. We are now looking for a Senior Platform Engineer to help transform a large-scale development and deployment platform from traditional DevOps into a modern AI-assisted and agentic engineering setup. Permanent position at Twoday | Copenhagen Senior Backend .NET Developer – Digital Health Digital Engineering | Copenhagen Senior Backend .NET Developer – Digital Health Do you want to build and evolve business-critical digital solutions that support Denmark’s healthcare sector? Twoday is looking for experienced Backend .NET Developers to join a major, long-term digital health delivery in Copenhagen. You will work with complex systems where reliability, security, maintainability and technical quality are essential – and where the solutions you help build and operate have a direct impact on critical public services. This is a permanent position with Twoday, where this delivery would, if we win the tender, become your first assignment as a consultant with us. The role The customer is introducing a new delivery model in which several suppliers will collaborate closely on the development, maintenance and operation of a portfolio of business-critical healthcare applications. Rather than operating as separate supplier organisations, developers from different companies will work together in shared teams. This makes technical expertise essential, but it also requires engineers who collaborate well, share knowledge and take responsibility for the overall delivery – not just their own code. As a Senior Backend .NET Developer, you will work hands-on throughout the software delivery lifecycle: from analysis and refinement through design and development to testing, deployment, maintenance and troubleshooting in production. You will be expected to contribute to building robust solutions and to take technical ownership in close collaboration with other developers, Solution Architects, testers, DevOps specialists and product stakeholders. Your responsibilities will include: Designing, developing and maintaining backend services and server-side components Developing APIs and integrations across a complex application landscape Contributing to application design, data modelling and technical decision-making Working with microservices, distributed systems and event-driven architectures Designing for resilience, scalability, high availability and operational stability Working with messaging technologies and asynchronous communication Building and maintaining automated build, test and deployment pipelines Contributing to containerised deployment and modern infrastructure…