Full Stack Developer - Healthcare Tech (Copenhagen, Onsite)

Twoday; Københavns Kommune; On-site; DKK 700,000 - 900,000; Full time

Job summary

Twoday in Copenhagen is seeking experienced Full Stack Developers to work on business-critical digital solutions for the Danish healthcare sector. You will join our Digital Engineering organisation to modernise and maintain complex healthcare systems, collaborating with developers, architects, testers and DevOps specialists across multiple suppliers.

You will work across the full technology stack—from backend services and integrations to frontend applications, testing and production support.

Qualifications

• Solid professional fullstack development experience.
• Strong backend experience with C#/.NET, Java/Spring Boot or comparable technologies.
• Experience with JavaScript/TypeScript and modern frontend frameworks such as React, Angular or Vue.
• Experience with REST APIs, integrations and relational databases.
• Understanding of OAuth2/OpenID Connect, secure coding and API security.
• Knowledge of event-driven architecture, idempotency and asynchronous processing.
• Experience with automated testing, Git and CI/CD.
• Experience working in complex enterprise environments.
• Fluent Danish, both written and spoken.

Responsibilities

• Developing and maintaining backend services, REST APIs and modern frontend applications.
• Building secure, reliable integrations between systems.
• Working with relational databases and data-driven applications.
• Implementing authentication, authorisation and secure API communication.
• Contributing to event-driven solutions and asynchronous processing.
• Developing automated tests and supporting CI/CD and deployments.
• Troubleshooting production issues and improving system performance and stability.
• Collaborating across teams and suppliers on technical design, documentation and delivery.

Skills

Full stack development

C#/.NET

Java/Spring Boot

JavaScript/TypeScript

React/Angular/Vue

REST APIs

OAuth2/OpenID Connect

CI/CD

Docker/Kubernetes

Testing

Danish language

Tools

Docker

Kubernetes

Job description

Twoday in Copenhagen is seeking experienced Full Stack Developers to work on business-critical digital solutions for the Danish healthcare sector. You will join our Digital Engineering organisation to modernise and maintain complex healthcare systems, collaborating with developers, architects, testers and DevOps specialists across multiple suppliers.

You will work across the full technology stack—from backend services and integrations to frontend applications, testing and production support.