Senior Java L3 Application Support Engineer - Core Banking & Payments

Role: Senior Java L3 Application Support Engineer - Core Banking & Payments

Location: Dallas, TX (Onsite)

Type: Contract

Day to Day Job Duties: (What this person will do on a daily/weekly basis)

• Provide Level 3 application support for critical banking platforms, including payments, clearing, settlement, digital banking, and related transaction-processing systems.
• Lead troubleshooting and resolution of high-severity production incidents affecting transaction message flows, ledger processing, payment gateways, and other critical banking services.
• Perform code-level debugging of multi-threaded Java applications to identify and resolve complex application defects, data discrepancies, memory leaks, concurrency issues, and performance bottlenecks.
• Conduct detailed Root Cause Analysis (RCA) for critical production incidents and implement appropriate corrective and preventive actions.
• Design, develop, test, and deploy application enhancements, API hotfixes, patches, and structural bug fixes within an Agile Software Development Life Cycle (SDLC).
• Analyze application logs, transaction flows, database execution paths, and system behavior to identify and resolve production issues.
• Monitor transaction processing and scheduled Unix/Linux batch jobs to identify failed transactions, processing errors, and abnormal system behavior.
• Troubleshoot and support enterprise Java applications developed using Spring, Spring Boot, Hibernate, and microservice-based architectures.
• Investigate and resolve application integration and financial messaging issues involving RESTful APIs, Apache Camel, JMS, Kafka, ISO 20022, SWIFT, and related technologies.
• Perform advanced database troubleshooting using SQL across Oracle, PostgreSQL, and/or PL/SQL environments, including complex queries, joins, data validation, and indexing analysis.
• Use application monitoring and observability tools such as Splunk, Dynatrace, Datadog, and Grafana to analyze live production issues and application performance.
• Support application uptime, availability, reliability, performance, and security for business-critical banking platforms.
• Follow established ITIL incident-management, problem-management, and change-management processes.
• Apply secure coding and application support practices to protect sensitive banking and financial data.
• Collaborate with development, infrastructure, database, operations, business, and other technology teams to resolve production issues and implement application changes.

Basic Qualifications: (What are the skills required for this job with minimum years of experience on each)

• Minimum 5+ years of experience in enterprise Java application development, application support, production support, or a related technical role.
• Hands-on experience with Java 8/11/17+, including multithreading, collections, object-oriented programming concepts, code-level debugging, and application troubleshooting.
• Hands-on experience with enterprise Java frameworks and technologies such as Spring, Spring Boot, Hibernate, and/or microservices.
• Experience working with RESTful APIs and application integrations.
• Experience with messaging and integration technologies such as Apache Camel, JMS, Kafka, ISO 20022, and/or SWIFT.
• Advanced experience with SQL and relational databases, including complex querying, joins, data analysis, troubleshooting, and indexing validation using Oracle, PostgreSQL, and/or PL/SQL.
• Experience troubleshooting live production systems using monitoring and observability tools such as Splunk, Dynatrace, Datadog, and/or Grafana.
• Experience performing Root Cause Analysis, production incident troubleshooting, code-level debugging, and application defect resolution.
• Experience supporting Unix/Linux-based environments, including troubleshooting scheduled batch processes and application jobs.
• Experience working within Agile SDLC, incident-management, change-management, and secure coding practices.
• Minimum 1+ year of experience working within Banking or Financial Services, including Investment Banking, Retail Banking, Corporate Banking, Wealth Management, Payments, or a related financial-services environment.

Travel: Not specified in the source job description.

Degree: Degree requirement not specified in the source job description.

Nice to Have: (But not a must)

• Experience supporting core banking or payment-processing platforms.
• Experience supporting clearing, settlement, ledger-processing, or digital-banking applications.
• Experience working with ISO 20022 or SWIFT financial messaging standards.
• Experience supporting highly available and business-critical financial applications.
• Experience working with ITIL-based incident, problem, and change-management processes.
• Experience troubleshooting performance issues involving multithreading, concurrency, memory utilization, and high-volume transaction processing.