Senior Java Developer

About the role Elite Challenge: Are you the Senior Java Developer ready to revolutionize mission-critical systems? Location/Work Mode: Madrid, Spain (Paseo de la Castellana) — On-site Schedule: Monday to Friday, 09:00 – 18:00 Your Role and Mission in the Company At Initium Software , we are not a typical consultancy; we are strategic partners who believe in real impact through technology. We connect top technical talent with the most challenging and innovative projects in the market. We are looking for an elite Senior Java Developer / Support Analyst . Your mission will be to lead stability, diagnosis, and resolution of complex failures in distributed microservices architectures within the financial portfolio of one of our most important clients. This is not about monotonously maintaining code, but about being the key piece that ensures high availability of critical systems through cutting-edge support engineering (L2/L3). Your Mission (High-Impact Challenges) Ensure High Availability: Provide L2/L3 support for microservices developed in Java/Spring Boot and REST API integrations. Advanced Environment Diagnosis: Detect and resolve execution failures in distributed architectures across cloud and on-premise ecosystems (AWS, IBM Cloud, WebSphere, Docker/Kubernetes). Optimize Data Flow: Resolve incidents in high-traffic enterprise messaging systems, managing concurrency, performance, and lag in Apache Kafka and IBM MQ. Adaptive Software Engineering: Implement code-level fixes, refactoring, and test coverage improvements for legacy Java services. Smart Monitoring and Automation: Contribute to shift-left automation initiatives, create self-healing scripts, and optimize observability alerts using ELK Stack or Splunk. What we're looking for Your Arsenal (What We Look For in You) Essential Experience: Between 8 and 10 years of solid track record in Java/J2EE software development and critical application support. Service Focus (ASM): Proven experience in Managed Services (AMS) and application support under strict OLA/SLA frameworks. Core Tech Stack: Expert proficiency in Spring Boot, microservices architecture, and RESTful API maintenance. Databases & Messaging: Experience in query optimization and incident resolution in MongoDB, IBM DB2, MSSQL, or Elasticsearch; as well as management of Apache Kafka or IBM MQ. Containers: Operational experience with Docker and Kubernetes. Languages: Upper-intermediate English level (minimum B2) and fluency in Spanish to interact effectively in multicultural environments. You hold certification or solid knowledge in ITIL (ITSM). You have experience in the banking or financial services sector. We especially value if you also have... You are familiar with CI/CD tools (Jenkins, GitLab CI, Maven, SonarQube). Passion for learning, sharing ideas, and evolving together with the team. What you'll get What Do We Offer? Compensation: Competitive fixed salary aligned with your expert level. Location: Work based at the client's Madrid offices within a dynamic, high-level corporate ecosystem. High-performance environment: A space where your initiative is valued, your impact is recognized, and your professional growth is genuinely supported. Initium Culture: A model based on autonomy, collaboration, dynamism, and continuous learning, far removed from traditional rigid structures. Let's talk about the future! At Initium, we don't just develop technology: we create an environment where people can grow, add value, and leave their mark. If you're looking for a place where your code and problem-solving skills have a real impact on large-scale financial systems, we want to meet you. Apply now by sending your CV Let's talk! Additional information How Will We Measure Your Impact? Ensuring a resolution rate for P3/P4 tickets within stipulated service levels (>=95%). Maintaining an outstanding mean time to recovery (MTTR) for critical incidents. Actively contributing to the known error database (KEDB) and standard operating procedures (SOP) to mitigate incident recurrence to less than 5%.