Senior Backend Java Developer – Digital Health

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

Job summary

Twoday in Copenhagen is seeking a Java Developer to join as a permanent consultant for a major public sector client. You will work full-time onsite, delivering secure, scalable enterprise Java applications within a multi-supplier delivery environment.

You will strengthen backend services with Spring, REST, Docker and Linux, contribute to CI/CD via Azure DevOps, and help move toward cloud-native Kubernetes architectures using AI-assisted tooling.

Qualifications

• Strong professional experience with Java development.
• Experience with Spring Framework and REST services.
• Experience with Docker and Linux.
• Experience with Azure DevOps, Git and CI/CD.
• Experience with Gradle or similar build tools.
• Experience working with modern Open Source technologies.
• An interest in software quality, automation and continuous improvement.

Responsibilities

• Developing and maintaining enterprise Java applications.
• Building REST APIs and backend services using Java and Spring.
• Developing and maintaining containerised applications with Docker.
• Working with Linux-based environments and modern Open Source technologies.
• Contributing to CI/CD pipelines using Azure DevOps.
• Supporting the transition towards cloud-native architectures and Kubernetes.
• Using AI-assisted development tools to improve software development, testing and documentation.
• Collaborating with architects, developers and specialists across multiple suppliers in a large-scale delivery organisation.

Skills

Java development

Spring Framework

REST services

Docker

Linux

Azure DevOps

Git

CI/CD

Kubernetes

AI-assisted tools

Open Source technologies

Tools

Azure DevOps

Git

Job description

Permanent position at Twoday | Consultant role with a public sector client

Permanent position at Twoday | Copenhagen

Join Twoday as a Java Developer

Do you want to help build and maintain business‑critical digital solutions that support millions of citizens across Denmark?

We’re looking for an experienced Java Developer to join Twoday as a permanent consultant, working full‑time with one of Denmark’s largest public sector organisations. You’ll become part of a highly skilled development team delivering secure, scalable and modern software solutions in a complex technical environment.

What You’ll Be Doing

• Developing and maintaining enterprise Java applications
• Building REST APIs and backend services using Java and Spring
• Developing and maintaining containerised applications with Docker
• Working with Linux‑based environments and modern Open Source technologies
• Contributing to CI/CD pipelines using Azure DevOps
• Supporting the transition towards cloud‑native architectures and Kubernetes
• Using AI‑assisted development tools to improve software development, testing and documentation
• Collaborating with architects, developers and specialists across multiple suppliers in a large‑scale delivery organisation

We’re looking for someone with

• Strong professional experience with Java development
• Experience with Spring Framework and REST services
• Experience with Docker and Linux
• Experience with Azure DevOps, Git and CI/CD
• Experience with Gradle or similar build tools
• Experience working with modern Open Source technologies
• An interest in software quality, automation and continuous improvement

Experience developing or maintaining national healthcare solutions, healthcare integration platforms or other complex public sector systems is highly valued.

Experience working in a multi‑supplier delivery organisation is considered an advantage.

Experience using AI‑assisted development tools such as GitHub Copilot, ChatGPT or Cursor is an advantage.

Fluent Danish, both written and spoken, is a mandatory requirement.

Full‑time onsite work on Amager is a mandatory requirement.

Who You Are

• You enjoy solving complex technical challenges
• You take pride in writing maintainable, high‑quality code
• You enjoy working closely with experienced colleagues
• You are curious, collaborative and always looking for better ways of working

What we offer

As a permanent consultant, you’ll work on long‑term, business‑critical public sector projects while remaining part of Twoday’s professional engineering community. After each engagement, you’ll have the opportunity to continue your career on new and exciting customer projects.

Diversity & inclusion

Do you not meet all the requirements? Studies show that women and minorities are less likely to apply for a job if they don’t meet every qualification. At Twoday, we are committed to building a workplace and community where everyone is welcome. If you are excited about this role but your previous experience doesn’t perfectly align with the job description, we still encourage you to apply.