Medior Java Developer - Spring Boot & Microservices (Hybrid Amsterdam)

Outtask; Amsterdam; Hybrid; EUR 55,000 - 75,000; Full time

Benefits offered by this job

Budget for training and certifications

Guidance during assignment

Job summary

Outtask in Amsterdam is seeking a medior Java Developer to join a small team of 6–8. You’ll build and maintain microservices (REST APIs) in a hybrid setup from Amsterdam, focusing on a modern, event-driven architecture with Kafka and Azure Event Hub.

You’ll contribute to Kubernetes deployments, write tests with Testcontainers and MockMVC, and apply hexagonal architecture, SOLID and DDD. Collaboration within a tight team is essential, and you’ll have room to influence design and infra choices.

Qualifications

• A bachelor’s/master’s level of thinking and a 3-5 years of experience as a Java developer
• Experience with Spring Boot and building REST APIs
• Affinity with event-driven systems (Kafka, Event Hub) and an understanding of topics such as DLQ, message retry, message ordering and idempotency
• Knowledge of, or interest in, container orchestration (Kubernetes/AKS)
• Affinity with microservices architecture and the challenges that come with it (communication, consistency and deployments)
• A curiosity about how things work under the hood (for example Kafka serde) and an interest in monitoring, deployments and rollback strategies
• You like working independently, but also actively seek collaboration within a small team

Responsibilities

• Develop and maintain microservices (REST APIs) using Java 21 and Spring Boot
• Work with event-driven architecture via Azure Event Hub, including communication between microservices
• Deploy and manage applications on Kubernetes (AKS)
• Write automated tests using Testcontainers, WireMock, Mockito and MockMVC, including Kafka tests
• Apply architectural principles such as hexagonal architecture, SOLID and DDD
• Contribute to infrastructure as code (Terraform)

Skills

Java

Spring Boot

REST APIs

Kafka

Event Hub

Kubernetes/AKS

Testcontainers

Mockito

WireMock

MockMVC

Hexagonal architecture

SOLID principles

DDD

Terraform

Education

Bachelor’s/Master’s degree

Tools

Terraform

Kubernetes/AKS

Job description

Outtask in Amsterdam is seeking a medior Java Developer to join a small team of 6–8. You’ll build and maintain microservices (REST APIs) in a hybrid setup from Amsterdam, focusing on a modern, event-driven architecture with Kafka and Azure Event Hub.

You’ll contribute to Kubernetes deployments, write tests with Testcontainers and MockMVC, and apply hexagonal architecture, SOLID and DDD. Collaboration within a tight team is essential, and you’ll have room to influence design and infra choices.