Senior Java Platform Engineer – AI‑Driven Public Sector

Twoday Denmark; København; On-site; DKK 900,000 - 1,300,000; Full time

Job summary

Twoday Denmark in Copenhagen seeks a Senior Java Developer to join our public sector solutions team. You will develop and maintain Java applications, design services and REST APIs, and contribute to CI/CD.

You will operate in an established development environment, collaborate with colleagues and stakeholders, and help modernise enterprise software in a regulated context. Fluency in Danish and English is required.

Qualifications

• Several years of professional Java development experience.
• Hands-on Java and Spring or Spring Boot experience.
• Experience with integrations and REST-based services.
• Experience maintaining or modernising enterprise apps.
• Strong understanding of automated testing and software quality.
• Experience with CI/CD and modern development workflows.
• Ability to work independently while contributing to the team.
• Strong communication skills and understanding of the business domain.
• Fluency in Danish and English.
• Experience from large, regulated or public-sector organisations would be an advantage.

Responsibilities

• Developing and maintaining Java applications.
• Designing and implementing services, integrations and REST APIs.
• Modernising existing solutions while maintaining stability and quality.
• Writing automated tests and contributing to CI/CD.
• Troubleshooting and resolving complex technical issues.
• Participating in technical discussions and solution design.
• Sharing knowledge and reviewing code with other developers.

Skills

Java

Spring/Spring Boot

REST APIs

CI/CD

Automated testing

Enterprise apps

Communication

Danish & English

Public sector experience

Job description

Twoday Denmark in Copenhagen seeks a Senior Java Developer to join our public sector solutions team. You will develop and maintain Java applications, design services and REST APIs, and contribute to CI/CD.

You will operate in an established development environment, collaborate with colleagues and stakeholders, and help modernise enterprise software in a regulated context. Fluency in Danish and English is required.