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# Java Software Engineer

- **Company:** Wizeline
- **Location:** Barcelona, Spain
- **Contract:** Permanent contract
- **Skills:** Application Programming Interfaces (APIs), Artificial Intelligence, Amazon Web Services, Automation of Tests, Microsoft Azure, Configuration Management, Profiling, Dependency Injection, Distributed Systems, Memory Management, Monitoring of Systems, Java Persistence API, Spring Framework, Junit, Performance Tuning, Mockito, Prometheus, Data Processing, Multithreading, Cloud Platform System, Istio, Grafana, Spring Data, Integration Tests, Kubernetes, Deployment Automation, Restful APIs, Docker, Jenkins, Microservices
- **Published:** September 12, 2026
- **Apply:** https://startup.jobs/java-software-engineer-barcelona-hybrid-wizeline-6472693

## About the Role

* Java (11/17/21) - Deep understanding of multithreading, memory management, performance optimization, and concurrent data processing.
 * Spring & Spring Boot - Expertise in building RESTful APIs, dependency injection, configuration management, and Spring Data/JPA integration.
 * Microservices Architecture - Experience designing and maintaining distributed systems using service mesh patterns (Istio) with Docker and Kubernetes.

Infrastructure & DevOps

 * Strong understanding of CI/CD pipelines (e.g., Jenkins), automated testing, and environment management (staging, prod, integration).
 * Experience with container orchestration, deployment strategies (blue/green, rolling updates), and monitoring tools (Prometheus, Grafana).
 * Working knowledge of cloud environments (AWS or Azure)

Testing & Quality

 * Proficiency with JUnit, Mockito, and integration testing frameworks.
 * Ability to design and maintain automated API tests and validation suites within CI/CD pipelines.
 * Experience defining performance metrics, profiling, and resolving bottlenecks in large-scale systems.

Nice-to-have:

 * AI Tooling Proficiency: Leverage one or more AI tools to optimize and augment day-to-day work, including drafting, analysis, research, or process automation. Provide recommendations on effective AI use and identify opportunities to streamline workflows.



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