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.