Java Developer - Female Dutch Speaking are eligible

Ubique Systems; Amsterdam; On-site; EUR 90,000 - 130,000; Full time

Job summary

Ubique Systems seeks a senior Java developer with team leadership experience to drive end-to-end Java applications. You will lead cross-functional collaboration with Business, Architecture, Ops and Platform teams and own back-end design, implementation and integration using Java 21, Spring Boot, Kafka, and Cassandra.

The role emphasizes strong OOP, multithreading, and unit testing with JUnit/Mockito, with a focus on secure, scalable payments-related back-end services and REST MVC patterns.

Qualifications

• Experience leading a team for 2 complete Java development cycles.
• Experience handling large teams and collaborating with Business, Architecture, Ops and Platform teams.
• Strong knowledge of Java 21 and object-oriented concepts.
• Experience with Kafka and messaging queues.
• Experience with Cassandra databases and SQL.
• Design, develop, and maintain advanced Java-based back-end applications.

Responsibilities

• Lead a team and collaborate with cross-functional groups (Business, Architecture, Ops, Platform).
• Design, develop, and maintain Java-based back-end applications following standards.
• Document software designs, technical specifications, and code changes.
• Assess technical risk and debts and ensure integration quality.
• Perform unit testing with JUnit/Mockito and ensure robust code.

Skills

Team leadership

Java development

OOP

Lambda expressions

Streams API

Multithreading

Integration

Tools

Kafka

Spring Boot

JUnit/Mockito

Cassandra

SQL

Job description

Experience in Leading a Team for 2 complete Java development cycle (preferable E2E Java development with Java/Devops experience)

- Should have experience in handling a large team & collaborate with Business team, Architecture team and Operations (Ops) and Platform team for building Java applications, assess technical risk and Debts. Should be very good in integration.

- Design, develop, and maintain advanced Java-based applications (back-end Development), adhering to coding standards and best practices.

- Good understanding of Payments Domain – with European payments such as SEPA and SWIFT messaging services

- Strong knowledge of Java programming language ’Java 21 ‘and object-oriented concepts

- Should have worked in Kafka & Messaging Queues

- Should have experience with Casandra databases, SQL.

Document software designs, technical specifications, and code changes.

- Should have strong skills in OOPS, Collections, exception handling, concurrent programming, lambda expressions, stream API, Multithreading , (Dependency Injection, Spring Bean Lifecycle, Auto wiring, Spring Boot features, initializers, starters, autoconfiguration, profile, etc)

-Understanding of MVC/ REST ( Spring MVC Flow, Model&View, REST architecture, resources, HTTP methods and usage, URI mappings)

- Perform Unit testing and should have experience in JUNIT, frameworks like Junit / Mockito