Java Engineer

Summary

Join Zigzag as a Java Engineer and contribute to a fast-growing fintech company building next-generation payment solutions. As a member of the Core Services team, you will design, develop, and maintain Java-based applications for card payment authorization and processing. You will work on a cross-functional team focused on scalability, security, and performance, ensuring clean, maintainable, and testable code. Responsibilities include troubleshooting, debugging, and improving the performance and reliability of services. You will also contribute to continuous improvement of software development processes and stay updated on the latest Java technologies.

Requirements

• Min 5 years of professional experience in backend development with Java
• Experience building distributed systems and working on high-throughput backend services
• Strong understanding of microservices architecture and RESTful APIs
• Solid knowledge of relational databases (e.g., PostgreSQL, MySQL) and NoSQL systems
• Strong problem-solving skills
• Ability to work collaboratively in a team

Responsibilities

• Design, develop, and maintain Java-based applications
• Write clean, maintainable, and testable code following best practices
• Participate in code reviews and ensure code quality
• Troubleshoot and debug issues in existing software
• Work on improving performance, scalability, and reliability of ZAI services
• Contribute to the continuous improvement of software development processes
• Stay up-to-date with the latest Java technologies and best practices

Preferred Qualifications

• Experience with message brokers (Kafka, EventBridge, etc.) is a plus
• Familiarity with CI/CD practices and tools (e.g., BuildKite, etc)
• Familiarity with AWS