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Back End Developer

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Onsite

Back End Developer

KWAN

Back End Developer

Skills

SQL QueriesJavaSpring BootKafkaJenkinsJBoss

8 days ago

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Important information


Contract type:

Permanent

Location:

Lisbon, Portugal

Work mode:

Onsite

Published on:

12 October 2026

What they need


We are looking for a Senior Java Developer in Lisbon who's eager to embark on an exciting new opportunity! 💪

🤩 About KWAN

We connect IT professionals with projects that match their skills, professional experience, and goals, then we offer a career progression program, delivered by in-house specialists - our People Experience Partners - to guide them through our journey with us.

🚀 What is this challenge about

  • Drive end-to-end technical solution design and hands-on architecture for complex, high-throughput features in a distributed ecosystem.

  • Own the lifecycle of core backend services, ensuring scalability, resilience, and high availability across distributed components.

  • Lead functional and technical domain analyses, translating high-level business goals into precise system specifications and thorough engineering documentation.

  • Mentor team members on architectural patterns, code quality, testing standards, and best practices across the Java codebase.

  • Troubleshoot, diagnose, and resolve critical bugs and complex edge cases in production and staging environments.

  • Collaborate closely with cross-functional team members to align system capabilities with broader project milestones and delivery timelines.

🛠 What we are looking for

  • 5+ years of proven hands-on experience in Java and J2EE software development.

  • Solid knowledge and experience working with SQL databases.

  • Practical experience with JBoss and Spring Boot frameworks.

  • Proficiency in build automation using Maven.

  • Experience or knowledge with messaging and queuing technologies (JMS, Apache Pulsar, Kafka or ActiveMQ).

  • Familiarity with continuous integration and development tools (e.g. IntelliJ, Git, Jenkins, Nexus, Sonar, and Tofu).

  • Knowledge of distributed systems concepts and high-availability architecture principles.

👉 Do you meet most of the position requirements? Then grab this opportunity and apply now! 🤩💪

✨ What we offer

  • A project that matches your skills and ambitions, as well as your preferences for working policies and culture.

  • A competitive salary with awesome benefits and opportunities to leverage your knowledge and network to earn additional income.

  • An empowering and respectful work culture enriched with social and learning events.

  • A People Experience Partner specially assigned to you - your go-to career guide, responsible for supporting your growth, facilitating training, and ensuring your work-life balance at KWAN.

  • A relocation package and visa sponsorship for all our international hires.

🙌 Some Words From Our Colleagues

“At KWAN, they make sure that I feel comfortable with the client I’m working for and that what I’m doing aligns with my career aspirations.” - Luis Caldeira, DevOps @ KWAN

👉 Grab this opportunity, apply now! 🤩💪

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