Senior Java Developer
Senior Java developer at Twoday building and modernising business-critical public-sector solutions in Copenhagen. Day to day: developing Java/Spring services, REST APIs and integrations, writing automated tests, contributing to CI/CD, and collaborating with stakeholders — full-time onsite at a major public-sector customer. Professional Danish and English fluency required.
- Compensation
- Not disclosed
- Location
- København, DK
- Work setup
- Not specified
- Seniority
- Senior
- Employment
- Full time
- Experience
- Not specified
- Category
- Software engineering
- Posted
Skills
Must have
- Several years of professional Java development experience
- Hands-on experience with Java and Spring or Spring Boot
- Experience with integrations and REST-based services
- Experience maintaining or modernising existing enterprise applications
- Strong understanding of automated testing and software quality
- Experience with CI/CD and modern development workflows
- Ability to work independently while contributing actively to the team
- Strong communication skills and an interest in understanding the business domain
- Professional fluency in Danish and English
Nice to have
- Experience from large, regulated or public-sector organisations
Full description
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 | CopenhagenSenior Java Developer – Public Sector Solutions
Would you like to build and modernise business-critical solutions that support essential public services? We are looking for an experienced Java Developer to join Twoday, with your first assignment being for a major public-sector customer in Copenhagen.
Your role
You will join an established development environment and contribute hands-on throughout the development lifecycle. The role requires both strong Java expertise and an ability to discuss solutions, clarify requirements and collaborate closely with colleagues and stakeholders.
Your responsibilities will include:
- Developing and maintaining business-critical Java applications
- Designing and implementing services, integrations and REST APIs
- Modernising existing solutions while maintaining stability stability and quality
- Writing automated tests and contributing to CI/CD
- Troubleshooting and resolving complex technical issues
- Participating in technical discussions discussions and solution design
- Sharing knowledge and reviewing code with other developers
About you
We expect you to have:
- Several years of professional Java development experience
- Hands-on experience with Java and Spring or Spring Boot
- Experience with integrations and REST-based services
- Experience maintaining or modernising existing enterprise applications
- A strong understanding of automated testing and software quality
- Experience with CI/CD and modern development workflows
- The ability to work independently while contributing actively to the team
- Strong communication skills and an interest in understanding the business domain
- Professional fluency in Danish and English
Experience from large, regulated or public-sector organisations would be an advantage.