Mid/Senior Java Developer

Location: Remote (Lithuania, Latvia, or Estonia) Project: Fintech / Banking Start Date: ASAP Seniority: Mid / Senior Language: English (B2+) Employment: Long-term B2B Role Overview We are looking for a Mid/Senior Java Developer to join a long-term fintech/banking project. You will design and develop scalable backend services using Java 21 and Spring Boot , working in a modern microservices environment deployed on AWS. This role offers the opportunity to contribute to high-performance, secure backend systems while collaborating with experienced engineers in an Agile team. Key Responsibilities Design and develop scalable backend applications using Java 21 and Spring Boot Build and maintain REST APIs following best engineering practices Develop and support microservices-based solutions Manage builds and dependencies with Gradle Write and maintain automated tests using JUnit, Mockito, and AssertJ Ensure code quality through SonarQube and code reviews Work with GitLab and CI/CD pipelines Deploy containerized applications using Docker on AWS Implement logging and monitoring using Logback, SLF4J, and Grafana Develop event-driven solutions using Kafka Work with PostgreSQL and Redis Apply security best practices throughout the development lifecycle Collaborate with cross-functional teams in an Agile environment Must-Have Requirements Strong commercial experience with Java development Hands-on experience with Java 21 and Spring Boot Experience with microservices architecture Strong knowledge of REST API development Experience with Gradle Experience with JUnit, Mockito, and AssertJ Knowledge of SonarQube Experience with GitLab and CI/CD Hands-on experience with Docker and AWS Experience with Kafka Strong knowledge of PostgreSQL and Redis Understanding of security best practices and DevOps principles Strong analytical and problem-solving skills Lithuanian, Latvian, or Estonian citizenship (mandatory due to background check) English level B2+ Nice to Have Previous experience in fintech or banking projects