Senior Backend Java Engineer — Healthcare IT, Copenhagen

Twoday Denmark; København; On-site; DKK 900,000 - 1,200,000; Full time

Job summary

Twoday Denmark is seeking a Senior Backend Java Developer in Copenhagen to help build and evolve digital healthcare solutions. You will work across the full software delivery lifecycle in a collaborative, multi‑supplier environment, prioritising reliability, security and maintainability.

The role focuses on backend services, APIs, microservices and data modelling, with production readiness and strong collaboration across teams and stakeholders. Onsite work in Copenhagen is required.

Qualifications

• Experience delivering backend services in Java for complex business domains.
• Ability to design and implement APIs and integrations across a large application landscape.
• Experience with microservices and distributed systems; understanding event-driven architectures.
• Strong focus on security, data privacy and production readiness.

Responsibilities

• 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 practices
• Implementing logging, monitoring and observability
• Applying secure coding practices and considering security and privacy throughout the development lifecycle
• Writing automated tests and contributing to high standards for code quality and documentation
• Diagnosing and resolving issues across release and production environments
• Contributing to backlog refinement and translating requirements into technically sound solutions
• Sharing knowledge and collaborating across teams and suppliers

Skills

Java backend development

REST APIs

Microservices

Distributed systems

Data modelling / SQL

Domain-driven design

Security & privacy

Observability & monitoring

Agile software development

Team collaboration

Tools

Docker

Kubernetes

Kafka

Git

CI/CD

Job description

Twoday Denmark is seeking a Senior Backend Java Developer in Copenhagen to help build and evolve digital healthcare solutions. You will work across the full software delivery lifecycle in a collaborative, multi‑supplier environment, prioritising reliability, security and maintainability.

The role focuses on backend services, APIs, microservices and data modelling, with production readiness and strong collaboration across teams and stakeholders. Onsite work in Copenhagen is required.