Backend Developer (Java/Spring Boot)

Accountabilities

• • Develop clean, maintainable, testable, and efficient backend applications using Java and Spring Boot.

  • Design, build, and maintain secure, reliable REST APIs and backend services for frontend applications and other systems.

  • Develop and maintain PostgreSQL database schemas, queries, indexes, migrations, data models, and persistence layers using Hibernate/JPA.

  • Translate product and business requirements into robust backend functionality and well-structured business logic.

  • Develop and maintain microservices within distributed backend architectures.

  • Implement third-party integrations, internal services, and other backend integrations based on project requirements.

  • Ensure data accuracy, consistency, validation, and correct handling of edge cases.

  • Write and maintain automated tests and collaborate closely with QA engineers to ensure appropriate feature coverage.

  • Take ownership of assigned backend features from implementation through testing, release, and delivery.

  • Collaborate with frontend engineers, QA, DevOps, product managers, designers, and other backend developers to deliver complete product features.

  • Identify and communicate unclear requirements, technical risks, dependencies, and potential blockers early.

  • Participate in code reviews, pull requests, and collaborative development workflows.

  • Contribute to improving engineering practices, code quality, maintainability, and team processes.

  • Use AI-assisted development tools where appropriate to improve productivity while applying sound engineering judgment.

  Requirements

  • 3+ years of professional backend development experience.

  • Strong practical knowledge of modern Java development; experience with Java 21 is preferred.

  • Hands-on experience building backend applications and services with Spring Boot.

  • Practical experience with Hibernate/JPA and ORM-based persistence.

  • Good knowledge of PostgreSQL, relational databases, SQL, data modeling, and query performance.

  • Experience designing, implementing, testing, and consuming RESTful APIs.

  • Practical experience with automated backend testing and a strong understanding of testing as an integral part of software development.

  • Comfortable using Git, pull requests, code reviews, and collaborative development workflows.

  • Familiarity with microservices and distributed systems.

  • Experience with Domain-Driven Design or Event-Driven Architecture is a plus.

  • Familiarity with AWS or another cloud environment is advantageous, particularly experience with ECS/Fargate.

  • Experience in Fintech, SaaS, HR, Payroll, ERP, AI-enabled products, or complex enterprise platforms is beneficial.

  • Strong ownership and autonomy, with the ability to manage assigned features independently while knowing when to involve others.

  • Strong communication and collaboration skills when working with technical and non-technical stakeholders.

  • Ability to understand business requirements and translate them into reliable, well-structured backend solutions.

  • Experience using AI-assisted development tools such as Claude Code or similar is a bonus.

  • Fluent professional English is required.

  • Spanish language skills are a significant advantage, particularly for collaboration with LATAM stakeholders.

  • Comfortable working remotely and organizing your schedule around required collaboration windows.

  Benefits

  • Salary: €3,000 gross per month under a B2B contract.

  • Project duration: Project-focused engagement currently expected to run through February 2027.

  • Fully remote: Work remotely from Europe or LATAM.

  • Flexible schedule: Standard 40-hour workweek with flexibility to organize your working hours around the team’s collaboration needs.

  • Time-zone flexibility: Most working hours should overlap with the 9:00 AM–7:00 PM CET collaboration window.

  • Cross-functional environment: Work closely with backend, frontend, QA, DevOps, product, design, and client teams.

  • Autonomy: Take meaningful ownership of your work, manage responsibilities independently, and influence how solutions are delivered.

  • Modern engineering practices: Work with contemporary backend technologies, cloud infrastructure, automated testing, microservices, and AI-assisted development tools.

  • Remote collaboration: Join a distributed team with processes and tooling designed to support transparency and effective remote work.

  • Professional growth: Develop your technical and product skills through continuous collaboration, problem-solving, and exposure to diverse digital projects.

  • Collaborative culture: Work in an environment built around clarity, curiosity, growth, craftsmanship, care, and open communication.