Senior Java Software Engineer

Doghouse Recruitment; Netherlands; Remote; EUR 80,000 - 100,000; Full time

Benefits offered by this job

Vacation days

Xmas NYE off

Learning budget

Bike leasing

EU remote days

Team evenings

Small teams

Job summary

Doghouse Recruitment client seeks an experienced Java Developer to join a data integration platform serving the logistics sector. The role focuses on a Java 21 backend, with homegrown frameworks, Jetty/Netty and JPA, delivering new features while modernizing the system.

Responsibilities include building scalable backend services, improving observability, and collaborating across teams. Strong English communication and a customer-focused mindset are essential.

Qualifications

• 5+ years of professional software engineering experience.
• Strong core Java knowledge.
• Good understanding of concurrency, multithreading, and parallel processing.
• Experience working with complex or mature codebases.
• Understanding of backend architecture and APIs.
• Willingness to work with and improve legacy code.
• A customer-focused and product-oriented mindset.
• Strong communication skills in English.

Responsibilities

• Develop 70% of new features on a large Java 21 platform using core Java and homegrown frameworks.
• Maintain and address technical debt to improve stability and performance.
• Work on distributed systems, REST APIs, observability, and platform modernization.
• Collaborate with product teams to deliver robust backend capabilities.

Skills

5+ years of experience

Core Java

Concurrency & multithreading

Back-end architecture

English communication

Job description

My client is an established software company with more than 20 years of experience in data integration, primarily serving the DACH market with a strong focus on the logistics industry.

Their platform connects modern and legacy systems and runs both in the cloud (AWS) and on-premises. With around 2,000 customers, the company is now modernizing its product and engineering organization, introducing new APIs, AI capabilities, and an improved user experience.

The engineering culture is also evolving toward greater ownership, customer focus, open communication, and product thinking.

About the Role

Are you a Java Developer with at least 5 years of professional experience? You will work on a large and complex Java 21 platform built primarily with core Java, rather than Spring Boot. The environment includes homegrown frameworks alongside technologies such as Jetty, Netty, and JPA.

The role is strongly backend-focused, with approximately 70% new feature development and 30% maintenance and technical debt.

Depending on the team, you may work on distributed systems, high availability, REST APIs, user permissions, secure remote data access, observability, and platform modernization.

What You Will Bring

• 5+ years of professional software engineering experience
• Strong core Java knowledge
• Good understanding of concurrency, multithreading, and parallel processing
• Experience working with complex or mature codebases
• Understanding of backend architecture and APIs
• Willingness to work with and improve legacy code
• A customer-focused and product-oriented mindset
• Strong communication skills in English

Nice to Have

• Experience with Kafka, AMQP, MQTT, Jetty, Netty, JPA, Hazelcast, Infinispan, Prometheus, Micrometer, OpenTelemetry/OTLP, AWS, or distributed/high-availability systems would be beneficial but is not required.
• Experience using AI tools to improve engineering productivity or tackle technical debt would also be highly relevant.
• 30 vacation days per year
• Paid days off on Christmas Eve and New Year's Eve
• Personal learning and development budget
• JobRad bike leasing
• Work remotely from another EU country for up to 30 days per year
• Weekly team evenings
• Small engineering teams with meaningful ownership

€80,000–€100,000 gross per year, depending on experience.