Senior Java Developer - Backend Engineering Team

Location: Lisbon

Model: Hybrid - 2x times a week at Lisbon's office | Availability for international travel

Language: English

About the Role

We are seeking a highly skilled Senior Java Developer to join our Backend Engineering team. This role involves designing, developing, and maintaining backend services that support large-scale gaming and lottery platforms. You will integrate into a team of 8 consultants working on a pivotal project, contributing to new features, improvements, and ongoing system enhancements.

This is a long-term engagement (12+ months), providing the opportunity to work on high-impact, mission-critical backend systems utilizing modern Java and Spring technologies.

Key Responsibilities

• Design, develop, and maintain backend services using Java and Spring/Spring Boot frameworks.

• Implement high-quality, scalable code following best engineering practices.

• Contribute to backend architecture, design patterns, and technical decision-making.

• Participate in code reviews, debugging, and performance optimization.

• Collaborate closely with cross-functional teams to support new features and ongoing enhancements.

• Work on database integration using MySQL or Oracle, including writing efficient queries and troubleshooting issues.

• Ensure code quality and reliability through unit testing (JUnit) and CI/CD pipelines.

• Participate in Agile ceremonies and contribute to sprint planning and estimation.

• Provide technical knowledge sharing within the team and support less experienced developers when needed.

Must-Have Skills

• Strong proficiency in Java (Java 8+).

• Solid experience with Spring and Spring Boot.

• Hands-on experience with RESTful APIs and microservices architecture.

• Experience using relational databases (at least one of the following):

  • MySQL

  • Oracle Database

• Familiarity with Maven or Gradle build tools.

• Experience with version control using Git.

• Knowledge of Hibernate, JPA, or equivalent ORM technologies.

• Ability to work in English-speaking agile teams.

Nice-to-Have Skills

• Knowledge of Docker or containerized services.

• Experience with SQL performance optimization.

• Familiarity with Eclipse or IntelliJ IDEA.

• Experience working in large enterprise environments.

• Experience with additional JVM-based languages (e.g., Scala) is a plus.

Soft Skills

• Strong problem-solving and analytical mindset.

• Excellent communication and teamwork in an international environment.

• Ability to work independently and deliver high-quality work under minimal supervision.

• Adaptability and willingness to learn new technologies as required by the project.