Java Application Support Engineer

Quantum Technologies. LLC; San Leandro (CA); On-site; USD 90,000 - 120,000; Full time

Job summary

Quantum Technologies LLC is seeking a seasoned Java Application Support Engineer to provide L2/L3 production support for enterprise Java applications. You will monitor health, troubleshoot incidents, perform root cause analysis and support releases to ensure high availability and performance of critical systems.

The role requires strong Java expertise, incident management, and collaboration with Dev, Infra, DBA, Cloud and Business teams.

Qualifications

• Proven experience in Java, J2EE, Spring, Spring Boot and Microservices.
• Experience supporting RESTful APIs and distributed applications.
• Strong understanding of JVM, GC, thread management and performance tuning.
• Hands-on with Oracle/SQL Server/PostgreSQL/MySQL and strong SQL skills.
• Linux/Unix environment experience and shell scripting.
• Knowledge of Tomcat/JBoss/WebSphere application servers.
• Familiarity with messaging systems (Kafka/JMS/MQ).
• Experience with CI/CD tools (Jenkins, GitHub Actions, Azure DevOps, GitLab).
• Cloud familiarity (AWS/Azure/GCP) preferred.
• Experience with monitoring tools (AppDynamics, Dynatrace, Splunk, Grafana, Datadog, ELK, New Relic).
• ITIL incident/change/problem management familiarity.
• Ticketing tools (ServiceNow, Jira, Remedy).
• Ability to coordinate major incidents and on-call rotations.

Responsibilities

• Provide L2/L3 production support for Java-based enterprise applications and APIs.
• Monitor performance, availability and system health using observability tools.
• Investigate and resolve production incidents within SLA timelines.
• Analyze logs, thread dumps, heap dumps and metrics to diagnose issues.
• Perform RCA and implement preventive measures to reduce incidents.
• Support deployments, releases, environment management and post-release validation.
• Troubleshoot REST APIs, microservices, middleware, and batch processing failures.
• Execute SQL queries for data analysis and investigation.
• Collaborate with Development, Infrastructure, DBA, Cloud and Business teams for resolution.
• Participate in on-call support rotation for critical production issues.
• Drive automation initiatives to improve operational efficiency.
• Maintain documentation, runbooks and operational procedures.
• Support ITIL processes including incident, problem and change management.

Skills

Java/J2EE

Spring/Spring Boot

Microservices

REST APIs

SQL/DB troubleshooting

Linux/Unix

JVM tuning

Incident management

On-call support

ITIL knowledge

Communication

Tools

Jenkins

GitHub Actions

Azure DevOps

Git

Docker

Kubernetes

OpenShift

Job description

We are seeking a seasoned Java Application Support Engineer to provide L2/L3 production support for enterprise Java applications. The ideal candidate will be responsible for monitoring application health, troubleshooting production issues, performing root cause analysis, supporting releases, and ensuring high availability and performance of business-critical systems. The role requires strong expertise in Java technologies, incident management, database troubleshooting, and collaboration with development, infrastructure, and business teams.

Key Responsibilities:

• Provide L2/L3 production support for Java-based enterprise applications and APIs.
• Monitor application performance, availability, and system health using observability and monitoring tools.
• Investigate and resolve production incidents, service disruptions, and performance issues within SLA timelines.
• Analyze application logs, thread dumps, heap dumps, and system metrics to diagnose complex issues.
• Perform root cause analysis (RCA) and implement preventive measures to reduce recurring incidents.
• Support application deployments, releases, environment management, and post-release validation activities.
• Troubleshoot REST APIs, microservices, middleware integrations, and batch processing failures.
• Execute SQL queries for data analysis, validation, and issue investigation.
• Collaborate with Development, Infrastructure, DBA, Cloud, and Business teams for incident resolution.
• Participate in on-call support rotation for critical production issues.
• Drive automation initiatives to improve operational efficiency and reduce manual effort.
• Maintain support documentation, knowledge articles, runbooks, and operational procedures.
• Support change management, problem management, and incident management processes following ITIL best practices.

Required Qualifications

Technical Skills

• Strong experience in Java, J2EE, Spring, Spring Boot, and Microservices.
• Experience supporting RESTful APIs and distributed applications.
• Good understanding of JVM, Garbage Collection, Thread Management, and Performance Tuning.
• Hands-on experience with relational databases such as Oracle, SQL Server, PostgreSQL, or MySQL.
• Strong SQL skills for troubleshooting and data analysis.
• Experience with Linux/Unix environments and shell scripting.
• Knowledge of application servers such as Tomcat, JBoss, or WebSphere.
• Familiarity with messaging technologies like Kafka, JMS, or MQ.
• Experience with CI/CD tools such as Jenkins, GitHub Actions, Azure DevOps, or GitLab CI.
• Knowledge of cloud platforms such as AWS, Azure, or GCP is preferred.
• Experience using monitoring tools such as AppDynamics, Dynatrace, Splunk, Grafana, Datadog, ELK, or New Relic.

Process & Support Skills

• Strong understanding of ITIL processes including Incident, Problem, and Change Management.
• Experience working with ticketing tools such as ServiceNow, Jira, or Remedy.
• Ability to manage and coordinate P1/P2 Major Incidents.
• Excellent troubleshooting, analytical, and problem-solving skills.

Preferred Qualifications

• Experience supporting high-volume banking, financial services, insurance, or enterprise platforms.
• Exposure to container platforms such as Docker, Kubernetes, or OpenShift.
• Experience with AI-assisted developer tools such as GitHub Copilot or Microsoft Copilot.
• ITIL Foundation certification is a plus.

Soft Skills

• Strong communication and stakeholder management skills.
• Ability to work in a fast-paced production support environment.
• Strong ownership and accountability.
• Excellent collaboration and documentation skills.

Nice-to-Have Technologies

We are an equal opportunity employer. All aspects of employment including the decision to hire, promote, discipline, or discharge, will be based on merit, competence, performance, and business needs. We do not discriminate on the basis of race, color, religion, marital status, age, national origin, ancestry, physical or mental disability, medical condition, pregnancy, genetic information, gender, sexual orientation, gender identity or expression, national origin, citizenship/ immigration status, veteran status, or any other status protected under federal, state, or local law.