Senior / Expert Java Developer

About the Position

Senior/Expert Java Developer for bank backend: design, build, and modernize microservices and integrations; lead, mentor, and deliver in a hybrid Poland setup.

About the Client

Our client is a major international player in the banking industry. You will be joining their IMSecurities department, contributing to a large-scale technological transformation involving the migration of massive business flows and volumes projected through 2027–2029.

Responsibilities

• Design, develop, test, deploy, and support Java-based microservices and integration components.
• Connect internal security systems with other banking infrastructure using event-driven architectures.
• Analyze business requirements, document dependencies, and troubleshoot complex production issues.
• Contribute to the team's growth by sharing knowledge, promoting best development practices, and mentoring junior colleagues.
• Work in a Scrum environment (JIRA), filling in the blanks in requirement analysis and test case preparation when bottlenecks occur.

Requirements

• Experience: Min. 5 years (for Senior) or 10+ years (for Expert) of Java backend development in large-scale enterprise environments.
• Core Stack: Java, Spring Boot, Spring Integration.
• Architecture & Integrations: REST services, microservices, and integration patterns.
• Messaging: Event-driven integration platforms (preferably IBM MQ and Kafka).
• Databases: Strong SQL and relational database knowledge (preferably Oracle).
• DevOps & Testing: Maven, Git, CI/CD pipelines, and automated testing (JUnit, Testcontainers).
• Languages: Fluent English (both written and spoken).

Nice to Have

• Previous experience in banking, trading, custody, settlement, or other regulated domains.
• Familiarity with cloud-ready application design and containerization (Kubernetes).
• Experience modernizing legacy systems or building layers around vendor platforms.
• Practical use of AI-assisted development tools and static code analysis.

We Offer

• Salary: 140 - 170 PLN / hour (B2B).
• Type of Work: Hybrid (50% remote / 2-3 days a week in the office).
• Location: Gdańsk or Warsaw.

About the Company

Optiveum is a recruitment and consulting company created based on our 20-plus years of experience in HR & IT services.

We work for Clients located in Poland and abroad providing our local and international Candidates with Project-based or Permanent job opportunities in a remote or office-based model.

COMPANY DATA

Optiveum Sp. z o.o.

ul. Tomasza Zana 43 lok. 2.1 20-601 Lublin, Poland

nr KRS: 0000834436, NIP 7010975729

Contact us at: info (at) optiveum.com

Founded in 2020