Middle/Senior Java Developer

Middle/Senior Java Developer | CityPay.io 📍 Location: Tbilisi, Georgia | On-Site 🕘 Employment Type: Full-Time 💰 Salary: Competitive About CityPay.io CityPay.io is a pioneering cryptocurrency ecosystem in the region, offering seamless and easy cross-border transactions and on-spot payment solutions. As we continue to expand across the CIS region, our mission is to integrate cryptocurrency into everyday life and build a strong, innovative, and trusted community. Key Responsibilities: Architect and develop resilient backend services using Java and Spring Boot. Design systems that can handle large-scale event-driven data flows using Kafka or queues. Write clear, maintainable, and thoroughly tested code. Collaborate with DevOps and QA to ensure services are reliable, observable, and deployable. (Optional) Work on containerization and service deployment in Kubernetes environments. Required Qualifications: Strong experience in Java (11 or 21) with solid understanding of object-oriented design and microservices architecture. Proven expertise in Spring Boot for building modular, testable, and production-grade APIs. Strong working knowledge of SQL databases (PostgreSQL, MySQL) and NoSQL stores (MongoDB, Cassandra, etc.). Experience designing and implementing efficient, scalable, and fault-tolerant services. Hands-on experience with Kafka or similar event streaming platforms. Practical knowledge of RabbitMQ, ActiveMQ, or other message brokers. Experience containerizing services with Docker; Kubernetes experience is a plus. Deep understanding of software testing standards and experience writing tests using: JUnit for unit testing Cucumber/Gherkin for BDD-style integration tests Nice to Have Understanding of financial systems such as: Payments infrastructure Blockchain technologies Card processing systems Payment Service Providers (PSPs) Experience working in regulated environments (fintech, banking, etc.). Familiarity with CI/CD, observability tools, and secure API development.