Mid/Senior Java Developer

Bonapolia

Mid/Senior Java Developer designing scalable backend solutions for a fintech project in the Baltic States. Utilizing Java 21, Spring Boot, and cloud services with a remote working arrangement.

Posted 7/24/2026full-timeRemote • 🇪🇪 EstoniaSeniorWebsite

Core Competencies

Role fit

Core Competencies

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Demonstrates expertise in designing and developing scalable backend systems using Java 21 and Spring Boot, with a strong focus on microservices architecture, REST API optimization, and security best practices. Proficient in utilizing tools such as Gradle, Docker, and AWS for efficient development and deployment processes.

Highest-signal resume keywords

Java 21 DevelopmentSpring Boot FrameworkMicroservices ArchitectureREST API DevelopmentAWS Cloud Services

ATS Keywords

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Applicant Tracking System Keywords

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Hard Skills

Java 21Spring BootGradleJUnitMockitoAssertJDockerPostgreSQLRedisKafka

Soft Skills

Problem-SolvingAnalytical SkillsCollaborative Mindset

Tools & Technologies

SonarQubeGitLabCI/CD PipelinesLogbackSLF4JGrafana

Industry Keywords

Agile EnvironmentSecurity PrinciplesDevOps Practices

Tech Stack

Tools & technologies

AWSCloudDockerGradleGrafanaJavaJUnitKafkaMicroservicesMockitoPostgresRedisSpringSpring BootSpringBoot

About the role

Key responsibilities & impact

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

Requirements

What you’ll need

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.

Benefits

Comp & perks

Competitive salary
Flexible working hours
Professional development opportunities