Senior Backend Developer, Java Specialist (remote, based in EU) - International client

Senior Backend Java Developer

• Design and implement scalable, API-first backend solutions using Java and Spring Boot.

• Translate functional and architectural requirements into robust technical designs.

• Lead and mentor a squad of 2–3 backend engineers, promoting engineering best practices and code quality.

• Contribute to architecture decisions, ensuring clear separation of concerns, bounded contexts, maintainability, and operational simplicity.

• Develop high-quality, well-tested code through unit, integration, and contract testing.

• Design and build RESTful APIs and event-driven services aligned with OpenAPI and AsyncAPI specifications.

• Enforce API governance standards and backend development best practices.

• Develop and maintain integrations with third-party systems using JSON, XML, and XSD.

• Design, model, and optimize MongoDB schemas while managing database migrations and transactional consistency patterns.

• Apply secure development practices, including OAuth2, OpenID Connect (OIDC), and JWT authentication mechanisms.

• Support CI/CD pipelines, trunk-based development, and cloud-native deployment practices using Docker, Kubernetes, and Helm.

• Collaborate closely with architects, business analysts, UX designers, QA engineers, DevOps, and frontend developers in an international environment.

• Participate actively in Agile/Scrum ceremonies and contribute to continuous improvement initiatives.

• Extensive professional experience developing backend applications with Java and Spring Boot.

• Strong experience designing scalable, API-first architectures.

• Proven ability to lead technical initiatives and mentor engineering teams.

• Solid understanding of software architecture principles, including separation of concerns and domain-driven design concepts such as bounded contexts.

• Experience developing RESTful APIs and event-driven architectures.

• Strong knowledge of OpenAPI and AsyncAPI specifications.

• Experience working with JSON, XML, and XSD, including resilient integrations with third-party systems.

• Hands-on experience modelling and optimizing MongoDB databases.

• Knowledge of database migrations and transactional consistency patterns.

• Strong understanding of application security, including OAuth2, OpenID Connect (OIDC), and JWT.

• Experience working with automated testing frameworks, including unit, integration, and contract testing.

• Experience supporting CI/CD pipelines and modern software delivery practices.

• Hands-on experience with Docker, Kubernetes, Helm, and cloud-native application deployment.

• Experience working within Agile/Scrum environments.

• Strong communication and collaboration skills within cross-functional international teams.

• English proficiency at B2 level or higher.

• Experience working in distributed, international engineering teams.

• Passion for clean architecture, software craftsmanship, and continuous improvement.

• Experience with trunk-based development methodologies.

• Candidates must be based anywhere within Europe.

• Ability to work remotely while collaborating with international teams across European time zones.