Lead Java Developer

Location: Warsaw (hybrid - 1 a week in the office)

Rate: up to 170 pln net/h

Contract: B2B

The Lead Java Developer is responsible for leading and executing Java development tasks in the Payments Data Domain, focusing on optimizing existing services and driving the transition to modern technologies.

Main Responsibilities:

• Working as an Expert Java developer (with Apache Kafka) in Payments Data Domain.
• Review, refactor and optimize existing Java services.
• Technical lead for developers/data engineers in a scrum team.
• Contributing to solution architecture, design and maintainability of applications.
• Designing, building and maintaining near real-time data pipelines.
• Interacting with product owners and stakeholders to clarify requirements and detailed reporting needs.
• Supporting the transition of the existing solutions to a modern tech stack.
• Collaborating with other engineers and properly documenting your design and solutions.

Key Requirements:

• Expert in Java (Java8/Java21).
• Expert in designing, developing and optimizing Kafka producer and consumer code.
• Expert in SQL (Oracle, DB2, MSSQL or similar RDBMS).
• Experience building distributed, highly-available and high-throughput applications.
• Hands-on knowledge of domain-driven design, event sourcing architecture patterns, microservices architecture and clean code practices.

Nice to Have:

• Experience with cloud frameworks (AWS, Azure).
• Knowledge of Agile methodology.
• Familiarity with DevOps practices.