Senior Java Developer

About the Position

Senior Java Developer

Edge One Solutions Sp. z o.o is seeking a Senior Java Developer with extensive experience in Java, Spring, and Apache Kafka to join our team in Warsaw, Poland. This role is hybrid with 1 day/week on-site.

Responsibilities

• Implement and develop an Enterprise system (configuration, parameterization, extensions) and integrate with the current platform ecosystem
• Analyze business and technical requirements and implement them using configuration mechanisms, product extensions, and dedicated components
• Design, implement, and maintain integrations with internal and external systems using APIs, Apache Kafka, events, and integration services
• Develop backend solutions using Java, Spring, Spring Boot, Spring Cloud, and Hibernate
• Assess standard system capabilities and recommend the best approach (configuration, product extension, or dedicated solution)
• Design and implement solutions considering functional, non-functional, performance, security, and maintainability requirements
• Support data migration, environment integration, and preparation for production rollout
• Create and evolve unit and integration tests; participate in system-level testing
• Perform code reviews, configuration reviews, and integration solution reviews
• Use AI and agentic AI tools in analysis, design, implementation, testing, documentation, and maintenance
• Collaborate with an international system vendor on changes, bug fixing, and version planning
• Participate in Scrum events and work with business teams, architects, testers, and integration specialists
• Co-create enterprise deployment/integration standards and best practices
• Daily collaboration in an international project environment

Requirements

• Minimum 5 years of Java development experience
• Minimum 5 years with Spring/Spring Boot/Spring Cloud and Hibernate
• Minimum 3 years with Apache Kafka
• Minimum 5 years of SQL
• Practical unit testing experience with JUnit, TestNG, or Spock
• Integration testing experience with Testcontainers and WireMock
• Strong OOP knowledge and familiarity with Functional Programming
• Knowledge of application containerization
• Knowledge of process engines and BPMN notation
• Experience with resilience patterns/mechanisms for distributed systems
• React knowledge and experience creating frontend applications
• Ability to use AI tools in the software development process
• Knowledge of tools/techniques for application diagnostics and performance analysis
• English at least B2 (for international communication)

We Offer

• Full support for professional and personal development, aligned with your goals
• Individual support from a Service Delivery Manager to plan your career path and ensure comfort and satisfaction
• Training, certifications, and conferences with costs covered or subsidized
• SmartChange: possibility to change the project and move to the next one based on preferences
• Work-life balance initiatives (team integration events, sports activities, and edge1talks webinars)
• Physical activity support (sports initiatives and training room rentals)
• Health package: private healthcare, sports card, insurance, and psychological support

You’re encouraged to apply even if you don’t meet every requirement.

About the Company

Edge One Solutions Sp. z o.o is a leading company in the technology sector, dedicated to delivering innovative solutions and fostering a collaborative work environment.