Senior Java Developer / Analyst

Lisbon, Portugal

Senior (4-6 Years)

Hybrid

English Required Portuguese Required Not Accepting Candidates Living Abroad

Payments and financial technology company operating across Portugal. The team works on a distributed system, developing new requirements and features while owning the technical design of the solutions delivered.

What you will do

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.

Location and work model

Hybrid (3 days/week in the office, Lisboa)

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.

Nice to have

Experience or knowledge with messaging and queuing technologies (JMS, Apache Pulsar, or ActiveMQ).
Desirable knowledge of object-relational mapping and XML processing frameworks, including JAXB and JPA.
Familiarity with continuous integration and development tools (e.g. IntelliJ, Git, Jenkins, Nexus, Sonar, and Tofu).
Basic understanding or experience with Angular frontend development.
Knowledge of distributed systems concepts and high-availability architecture principles.

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 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.

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

At KWAN, I’m given the space to be myself and do what I love. I have control over the projects I work on, as well as the direction of my career.

Pedro Fonseca, Front End Developer @ KWAN

I see my People Experience Partner as someone who is always available to provide me with motivation and constant feedback, which helps me be sure that I am in the right place.

Josimar dos Reis, Software Developer @ KWAN

I know that I’ve contributed to the growth of a company that truly values a “people first culture”, because my ideas, experiences, and individuality were always appreciated.

João Nascimento, Software Developer (KWAN Alumni)

My two years at KWAN were an incredible experience! From the start, I was welcomed into a warm and collaborative environment where I felt truly supported.

Laís Ortiz, Software Developer @ (KWAN Alumni)

Grab this opportunity, apply now!