Senior Java Backend Engineer

Are you passionate about building scalable backend systems, modern cloud-native applications, and high-performance distributed architectures?

We're looking for a Senior Backend Engineer to join an international technology team working on the modernization of large-scale enterprise platforms. You'll play a key role in transforming legacy systems into modern microservices while contributing to the design of highly available, event-driven solutions used by thousands of users.

Location: Remote (must be based in Portugal)

️ Languages: Fluent in Spanish (mandatory)

What you'll be doing:

- Lead the modernization of legacy monolithic applications into scalable microservices.

- Design and develop robust Java/Spring Boot backend services following API-first principles.

- Build and maintain high-performance RESTful APIs using OpenAPI/Swagger.

- Develop event-driven architectures using Apache Kafka and streaming technologies.

- Deploy and operate cloud-native applications on AWS and/or GCP using Docker and Kubernetes.

- Improve delivery pipelines through CI/CD automation and DevOps best practices.

- Ensure high code quality through unit and integration testing, code reviews, pair programming, and Clean Code principles.

- Take ownership of features throughout the entire software development lifecycle—from design and implementation to deployment, monitoring, and production support.

- Collaborate with cross-functional and international teams to deliver reliable, scalable, and maintainable solutions.

✅ What we're looking for:

- 5+ years of professional experience in backend software development.

- Strong expertise in Java and the Spring ecosystem (Spring Boot, Spring Data).

- Solid experience designing and building distributed systems and microservices.

- Hands-on experience with Apache Kafka or similar event-driven messaging platforms.

- Experience with Docker, Kubernetes, and cloud platforms (AWS and/or GCP).

- Strong understanding of REST APIs, OpenAPI/Swagger, and API-first development.

- Knowledge of CI/CD pipelines and modern software engineering practices.

- Passion for Clean Code, software craftsmanship, and continuous improvement.

- Excellent analytical and problem-solving skills.

- Fluent in Spanish are mandatory.