Java Backend Developer (French Mandatory)

About the role

KCS IT is seeking an experienced Java Backend Developer to join its Lisbon office in a hybrid work setting. The role focuses on designing, developing, and maintaining robust backend services for a variety of clients across different sectors.

Key responsibilities

• Develop and maintain Java‑based microservices using Spring and Spring Boot.
• Design, implement, and optimise RESTful APIs and service integrations.
• Collaborate with cross‑functional teams to deliver high‑quality software solutions.
• Write unit and integration tests with JUnit and Mockito.
• Participate in CI/CD pipelines using tools such as Jenkins or GitLab CI.
• Containerise applications with Docker and orchestrate them with Kubernetes.
• Work with relational (PostgreSQL, MySQL) and non‑relational (MongoDB) databases.

Required profile

• Minimum 4‑5 years of professional experience as a backend developer.
• Fluent in English and French, both spoken and written.
• Strong problem‑solving skills and ability to work independently and in a team.

Required skills

• Java (Java 8 or higher)
• Spring / Spring Boot
• Maven, Hibernate
• PostgreSQL, MySQL, MongoDB
• RESTful API design
• Git version control
• JUnit, Mockito
• Jenkins or GitLab CI
• Microservices architecture
• Docker, Kubernetes
• Cloud platforms (AWS, GCP, Azure)

What we offer

• Personalised career development and training programs.
• Opportunities to work on international projects, including in the Benelux region.
• Flexible hybrid work model.
• Well‑being benefits such as nutrition, psychology, medical appointments, yoga and personal training (remote).