Java Software Engineer - Terminal Integration

Wallee Group is a leader in advanced payment solutions, dedicated to providing robust, scalable, and secure systems across multiple domains. We enhance customer experiences through innovative payment and finance technology that empowers businesses to grow efficiently. With operations spanning several countries, we thrive on collaboration and agility, utilizing the Scrum framework to drive our international teams. At Wallee, we stay at the forefront of market trends, continuously innovating to deliver premier services to our global customers.

To achieve our mission of providing the market's best payment experience, Wallee is seeking experienced and versatile java software engineers for our Vilnius office. As disruptors in the payment space, we build industry-leading systems that demand the highest standards of security and reliability. We are constantly pushing our solutions into new territories, and we are looking for engineers who thrive in a fast-paced, agile environment to help us redefine the future of finance.

• Design and develop highly resilient back-end systems using Java, ensuring our infrastructure handles global scale with ease.
• Follow best practices such as SOLID principles, design patterns, and proper error handling.
• Write and maintain unit and integration tests for new and existing code, ideally following a Test-Driven Development (TDD) approach.
• Participate in peer code reviews to ensure code quality and consistency across the codebase.
• Perform root cause analysis and implement fixes when incidents occur. Maintain clear documentation for systems and features.

• Deep knowledge in Java and core frameworks such as Spring, Spring Boot, and Hibernate.
• Proven experience building distributed systems and scalable, high-availability solutions.
• Strong proficiency in SQL and experience managing complex data structures.

• Experience in or interest in the payments industry and related financial systems.
• Hands-on experience with CI/CD pipelines (Jenkins/GitLab CI) and containerization (Docker, AWS ECS).
• Familiarity with microservices architecture, including designing and operating distributed systems
• Knowledge of Domain-Driven Design (DDD) principles and their application in real-world systems