Senior Java Developer

About the Role

As a Senior Java Developer in KSBs Digital Unit you will be at the forefront of innovation contributing to cutting-edge projects in Industrial IoT (IIoT) factory digitalization sales automation and digital sales platforms. You will work in a collaborative international environment with teams across Germany and other European countries.

We are looking for a passionate team player with strong technical expertise leadership qualities and a commitment to delivering high-quality maintainable and scalable software solutions.

Key Responsibilities

Lead the design and development of complex software components using modern Java technologies.

Apply software architecture principles and design patterns to build robust systems.

Guide and mentor junior and mid-level developers through code reviews and joint implementation.

Collaborate with cross-functional teams across geographies.

Participate in the full software development lifecycle (Agile or Waterfall).

Ensure high standards of code quality performance and security.

Contribute to CI/CD pipelines and containerized deployments in cloud and on-prem environments.

Required Experience

Minimum 6 years of hands-on experience in Java development.

Participation in more than 3 customer projects.

Proven experience in:

- Designing non-trivial software components.

- Applying design patterns and architectural principles.

- Leading or mentoring development teams.

Technical Skills (at least 3 from each category)

Frameworks & Tools:

Spring / Spring Boot / Spring REST

Hibernate JUnit

Maven Jenkins GIT

Swagger

Protocols & Data Formats:

HTTP MQTT OAuth

XML JSON JWT OData

Infrastructure & DevOps:

Docker Docker Swarm Kubernetes

Kafka ActiveMQ

Azure (IaaS PaaS Functions) AWS (Lambda S3)

Databases:

MS-SQL Oracle PostgreSQL MySQL

Hadoop Apache Spark SAP HANA Redis

Other Qualifications (at least 3 from each category)

Strong understanding of SDLC and Agile methodologies

Experience with code reviews JIRA/Confluence

Familiarity with REST APIs API gateways

CI/CD practices and Infrastructure as Code

Container orchestration with Kubernetes or Docker Swarm