Senior Java EE Developer

7N Sp. z o.o.; Warszawa; On-site; PLN 169,000 - 254,000; Full time

Job summary

A leading software development company in Poland is seeking a skilled Java Developer with at least 5 years of experience. The candidate will design and build applications using Java EE, migrate existing commercial applications to a cloud-based platform, and create automated tests. Strong knowledge of Java EE, agile methodologies, and excellent communication skills in English are essential. Experience with container orchestration and cloud technologies is a plus.

Qualifications

• Min. 5 years of experience.
• Excellent spoken and written English.
• Experience with software design and modeling tools, e.g., UML.

Responsibilities

• Design and build applications using Java EE.
• Migrate existing applications to a modern cloud-based platform.
• Create automated tests, including unit and integration tests.

Skills

Java EE skills

Object-oriented programming

Agile software development methodologies

Strong communication skills

Cloud technologies

DevOps experience

Tools

Docker

Kubernetes

Jenkins

Apache Kafka

Job description

• Design and build applications using Java EE
• Work within an architecture grounded in Clean Architecture principles and Domain-Driven Design
• Examine current systems, solutions, business workflows, and requirements in close collaboration with internal stakeholders and external partners
• Migrate existing commercial applications from a procedural technology stack to a modern, cloud-based platform
• Create automated tests (unit, database, and Selenium-based integration tests)
• Contribute to every stage of the software development lifecycle - analysis, design, testing, deployment, maintenance, and 3rd-level support
• Collaborate directly with colleagues from across the globe
• Min. 5 years of experience
• Strong object-oriented programming and Java EE skills (including JPA, CDI, JTA, JAX-RS, Servlet, Messaging, Batch & Stream processing, Logging & Monitoring)
• Experience with software design and modeling tools (e.g., UML)
• Knowledge of relational databases and SQL
• Understanding of software development processes, with flexibility and strong customer focus
• Excellent spoken and written English, with strong communication skills
• Experience with agile software development methodologies (e.g., Scrum or Kanban)
• Interest in cloud technologies (AWS & IBM) and microservices development
• Experience with container orchestration (Docker, Kubernetes, OpenShift)
• Knowledge in designing distributed computing and web service architectures, building large-scale applications
• Familiarity with messaging systems (e.g., Apache Kafka)
• Experience or understanding of international logistics
• DevOps experience (e.g., Jenkins, Artifactory, Maven, GitLab/GitHub)