Java Developer

QAT Global, a US-based IT consulting firm with over 30 years of experience, is looking for aJava Developerto join our international team. We deliver world-class technology solutions with teams across the US, Costa Rica, and Brazil.This is afull-time, remote position(CLT hire in Brazil only), offering the opportunity to collaborate directly with ourUS-based clientand distributed development teams.About the Role:As aJava Developer , you will work on the design, development, and maintenance of Java-based applications that support key business functions. A strong command ofJava 8and hands-on experience with theELK Stack (Elasticsearch, Logstash, Kibana)are essential for this role, as you will be deeply involved in log validation, performance optimization, and application stability. This position is ideal for a professional who thrives in an agile, collaborative environment and enjoys solving complex technical challenges across multiple applications.Key Responsibilities:Develop, maintain, and enhanceJava 8applications usingSpring Framework(Spring 4.1.3 and Spring Security 3.2.5). Lead and participate inapplication migration projects , with a focus on optimizing and validatinglogs in ELK . Implement and fine-tuneElasticsearchindexing, querying, and data retrieval for high-performance applications. Maintain and enhance front-end components usingJSP, jQuery, and AngularJS . Configure and deploy applications onTomcat servers , ensuring reliability outside OpenShift environments. Collaborate with cross-functional teams to manage approximately40 applications , maintaining stability and version consistency. UtilizeAzure DevOpstemplates for CI/CD pipelines. Implement and maintainautomated smoke testsfor proactive issue detection.Required Qualifications:Expert-level experience with Java 8andSpring Frameworks(Spring 4.1.3, Spring Security 3.2.5). Proven expertise working with theELK Stack (Elasticsearch, Logstash, Kibana)for log management, validation, and performance analysis. Strong understanding ofTomcat server configurationand deployments. Experience developing scalable applications withSpring Boot 1.5.x . Familiarity withAzure DevOpsandautomated testing frameworks . Solid knowledge ofUI frameworks(JSP, jQuery, AngularJS). Excellent problem-solving skills, particularly in debugging, log validation, and application migration. Strong English communication skills and ability to work effectively in distributed teams. Bachelor’s degree inComputer Science ,Information Technology , or related field (or equivalent experience).Preferred Qualifications:BS/MS inSystems Analysis and Development ,Computer Science , orComputer Engineering . Additional experience inclient-facing rolesor international projects.