About the role

Design and develop scalable, high-performance backend systems using Java 21 and Spring Boot within a microservices architecture. Manage the full development lifecycle including API optimization, containerization with Docker, and monitoring via Grafana.

What they look for

Java 21 Spring Boot Microservices Architecture REST API AWS Docker Kafka PostgreSQL Redis GitLab CI/CD Gradle JUnit Mockito AssertJ SonarQube Grafana

Requirements

Requires professional experience in Java development with proficiency in Java 21, Spring Boot, AWS, and Kafka. Candidates must hold citizenship in Lithuania, Latvia, or Estonia and be fluent in English.

Full description

Project/Client: Banking / Fintech Location: Baltic States and Poland (Remote) Start Date: ASAP Duration: Long-term with possible extension Seniority: Mid / Senior Language: English

Role Overview:

We are looking for a Mid/Senior Java Developer to join a long-term fintech / banking project. The role involves designing and developing scalable backend solutions using Java 21 and Spring Boot, working within a microservices architecture, and ensuring high performance and reliability of backend systems. The ideal candidate brings hands-on experience with REST API development, cloud environments (AWS), and modern DevOps practices, and holds valid residency in Lithuania, Latvia, or Estonia (citizenship required; background check applies).

Key Responsibilities:

Design and develop scalable, high-performance backend systems using Java 21 and Spring Boot

Build and optimize REST APIs following best practices in software architecture

Work within a microservices architecture, ensuring modularity and maintainability

Manage builds and dependencies using Gradle

Write and maintain automated tests using JUnit, Mockito, and AssertJ

Ensure code quality through SonarQube analysis and code review processes

Work with GitLab for version control and CI/CD pipeline management

Containerize and deploy services using Docker on AWS

Implement logging with Logback / SLF4J and monitor systems via Grafana

Handle asynchronous event-driven communication using Kafka

Work with PostgreSQL as the primary database and Redis for caching

Apply strong security principles and best practices throughout the development lifecycle

Collaborate closely with cross-functional teams in an agile environment

Must-Have Requirements:

Proven professional experience in Java development with a strong technical background

Proficiency in Java 21 and Spring Boot

Experience with Gradle as a build and dependency management tool

Hands-on experience with JUnit, Mockito, and AssertJ for testing

Familiarity with SonarQube for code quality assurance

Solid experience with GitLab and CI/CD pipelines

Experience with Docker containerization

Hands-on experience with AWS cloud services

Knowledge of Logback and SLF4J for logging

Experience with Grafana for system monitoring

Working knowledge of Kafka for messaging and event streaming

Proficiency with PostgreSQL and Redis

Expertise in solution design and microservices architecture

Strong understanding of security principles and best practices in software development

Knowledge of DevOps practices and related tooling

Strong problem-solving and analytical skills with a collaborative mindset

Lithuanian, Latvian, or Estonian citizenship (residency requirement; BGC required)

Fluency in English

Nice to Have:

Prior experience working on fintech projects

📩 Ready to Join? We look forward to receiving your application and welcoming you to our team!