Senior Java Developer /Backend (Remote from EU)

Remote
Full Time
Experienced

We are seeking a Senior Java Developer to strengthen our backend engineering team responsible for designing and maintaining high-performance, scalable enterprise applications. The ideal professional has a deep understanding of modern Java frameworks, distributed architectures, and database optimization. This position involves full ownership of backend services — from design and development to integration, performance tuning, and deployment in cloud-native environments.

Technical Requirements and Knowledge

  • Programming: Advanced expertise in Java, Maven, and frameworks such as Quarkus or Spring, applied in large-scale production systems.

  • Databases: Proven experience managing and optimizing MongoDB and PostgreSQL, including schema design, indexing strategies, and performance tuning.

  • Architecture: Strong knowledge of microservices, event-driven architecture (Kafka), and integration with ELK stacks for observability.

  • DevOps: Practical experience with Docker, Kubernetes, Jenkins, SonarQube, Nexus, and continuous integration/delivery pipelines.

  • Performance Optimization: Proficiency in profiling, testing, and tuning backend systems to ensure reliability and scalability.

  • Security: Sound understanding of secure coding principles, vulnerability prevention, and compliance with software security standards.

  • Version Control: Proficient in Git, preferably with Bitbucket repositories.

  • Agile Practices: Experience working in Agile/Scrum environments focused on iterative and high-quality delivery.

  • Tooling Exposure: Familiarity with security and profiling tools such as Snyk, OWASP, or similar.

Key Responsibilities

  • Design, implement, and maintain backend components and microservices ensuring performance, scalability, and maintainability.

  • Optimize database performance and ensure robust data flow between systems.

  • Integrate event-driven communication using Kafka and manage logging and monitoring through ELK.

  • Participate in defining system architecture and technical standards aligned with project goals.

  • Implement DevOps best practices to automate builds, tests, and deployments.

  • Identify and resolve system bottlenecks and performance issues at both code and infrastructure levels.

  • Apply and maintain secure development practices throughout the lifecycle of applications.

  • Collaborate closely with cross-functional teams including product owners, architects, and QA engineers.

  • Provide mentorship to less experienced developers, promoting knowledge sharing and technical growth.

  • Take end-to-end responsibility for assigned deliverables — from analysis and implementation to deployment and post-release monitoring.

Hiring Details

  • Seniority: Senior (5–7+ years of relevant experience).

  • Language: English level B2/C1 (mandatory).

  • Work setup: 100% remote. Travel: Occasional travel to Brussels may be required.

  • Eligibility: Open to EU citizens or professionals residing in the EU with a valid work permit.

  • Engagement options: Freelance or Spanish employment contract, depending on the candidate’s preference and location.

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