Job Description - Senior Java Developer | Once a month RTO
ZigZag is looking for a Senior Java Developer to join our team!
About Us We’re a fast-growing fintech company building the next generation of payments solutions. Our Core Services team powers critical backend systems that process high-volume, low-latency transactions securely and reliably. We’re currently looking for skilled Java engineers to help build and enhance the core of our card payment processing systems.
About the Role As a Java Engineer in the Core team, you’ll work on developing and maintaining the core services responsible for card payment authorisation and processing. You’ll be part of a cross-functional team focused on scalability, security, and performance.
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.
Qualifications
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.
Experience with message brokers (Kafka, EventBridge, etc.) is a plus.
Familiarity with CI/CD practices and tools (e.g., BuildKite, etc).
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