99x Europe (antiga Cleverti)

99x Europe is a Portuguese tech company focused on providing software development, testing, and support services through competence centers located in Portugal. We offer a specialized, customized, and quick response to your IT projects, providing services, skills, and business models tailored to your requirements.
About company

Senior Java Developer

Remote

location Porto

date July 5, 2026

types Full time

We are looking for a Senior Java Developer to join our international team working on a global project. You will be responsible for designing, developing, and maintaining high-performance backend systems. The work is hybrid, 1-2 times a week in the office in Porto. Communication with the team and stakeholders is in Portuguese and English.

Responsibilities

  • Develop and maintain scalable backend services using Java.
  • Collaborate with cross-functional teams to define, design, and implement new features.
  • Write clean, testable, and efficient code following best practices.
  • Participate in code reviews and provide constructive feedback.
  • Troubleshoot production issues, debug, and resolve failures.
  • Contribute to technical documentation and continuous improvement efforts.

Requirements

  • Over 5 years of experience in backend development in Java.
  • Strong knowledge of Java (11 or higher) and Spring/Spring Boot.
  • Experience with REST APIs and microservices architecture.
  • Familiarity with relational databases (e.g., PostgreSQL, MySQL).
  • Experience with version control tools (e.g., Git).
  • Comfortable working in Agile environments.
  • Good communication skills and fluency in English.

If this sounds familiar, send us your CV and let's talk!