Senior Java Developer
statestreet
Senior Java Developer
About this role
We are looking for Senior Java Developers to join a long-term payments technology programme supporting a large-scale terminal management platform. The role focuses on backend development, enterprise integrations, system modernisation, and the gradual transformation of a business-critical platform managing hundreds of thousands of payment terminals.
This is a hands-on engineering position requiring strong Java expertise, experience with distributed systems, and the ability to work independently within a complex enterprise environment that combines modern technologies with legacy components.
Responsibilities
• Design and implement IT solutions based on analytical and technical documentation
• Review analytical documentation and translate it into technical implementation
• Create and maintain technical documentation
• Support technical upgrade and modernisation of the existing system
• Work with legacy code and contribute to gradual system migration
• Conduct regular application scans and remove vulnerabilities
• Build and maintain integrations with internal and external systems
• Work with distributed transactions, queues, caching, and database integrations
Requirements
• Very good knowledge of Java 8+ and object oriented programming
• Practical experience with Spring, Spring Boot, Hibernate/JPA, and JEE
• Experience designing, implementing, documenting, and testing application components independently
• Practical knowledge of RabbitMQ or other message queue systems
• Good knowledge of Maven, Git, GitLab, GitLab CI/CD, Jenkins, Nexus, Jira
• Knowledge of relational databases, especially Oracle
• Practical experience with REST API design
• Experience with system integrations and distributed systems
• Experience with application servers such as JBoss / WildFly
• Knowledge of scanning tools such as Fortify or Sonatype
• English B2
• Fluent Polish
• Fluent Polish
• Full availability in the Polish time zone
• Ability to work 5 days per week from the Warsaw office
Nice to have
• Experience in payments, acquiring, terminal management, or financial services
• Experience with SOAP, RMI, database links, or direct database integrations
• Experience with Hazelcast or distributed caching
• Experience with distributed transaction patterns such as two phase commit or Saga
• Experience working with legacy systems and migration programmes
• Experience with GWT / GWTExt
Benefits
• Solid, competitive salary
• Work in a multinational environment on international projects
• Comprehensive healthcare
• Long-term B2B contract with a stable project pipeline
Frequently Asked Questions
Is the salary disclosed for the Senior Java Developer position at madiffpl?
The salary for this Senior Java Developer role at madiffpl is not publicly listed. Click "Apply Now" to learn more about the compensation package on their official careers page.
Where is the Senior Java Developer position at madiffpl located?
This Senior Java Developer role at madiffpl is based in Warsaw, Poland. The position is listed as on-site or hybrid. Check the full job description or apply directly to confirm the work arrangement.
Is the Senior Java Developer role at madiffpl full-time or part-time?
This is listed as a Full time position. It is posted as a Senior Java Developer role at madiffpl.
How do I apply for the Senior Java Developer position at madiffpl?
Click the "Apply Now" button on this page. You will be redirected to madiffpl's official application portal hosted on zohorecruit where you can submit your application directly.
When was the Senior Java Developer job at madiffpl posted?
This Senior Java Developer position at madiffpl was posted on Jun 22, 2026. Apply as soon as possible — early applications are often reviewed first.
Senior Java Developer
madiffpl
You'll be redirected to madiffpl's official application page on zohorecruit.