Site Reliability Engineer: Mainframe & API Resilience

Huntington Bancshares, Inc.

Hagerstown (MD)

On-site

USD 57,000 - 113,000

Full time

14 days+

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Benefits offered by this job

Health insurance

Wellness program

Life and disability insurance

Retirement savings plan

Paid leave & holidays

PTO

Job summary

Huntington is seeking a Site Reliability Engineer to provide production support for Mainframe applications, APIs, and microservices. You will troubleshoot incidents, monitor batch processing, and collaborate across Infrastructure, Cloud, and Development teams to improve reliability.

The role covers API modernization, performance optimization, and post‑deployment validation, with a strong focus on automation, observability, and incident management in a demanding banking environment.

Qualifications

Bachelor’s Degree OR minimum 3 Years of related experience may be considered.
Mainframe support experience with z/OS, MVS, CICS, MQ, DB2, COBOL, JCL, and TSO/ISPF.
Experience supporting batch scheduling tools such as Zeke, Zena, CA7, Control‑M, or equivalent.
Knowledge of JSON, XML, REST, SOAP, API Gateway technologies, and Microservices architecture.
Experience troubleshooting API failures, authentication issues, SSL/TLS certificates, performance bottlenecks, and integration failures.
Experience with API modernization and SOAP-to-REST migration programs.

Responsibilities

Provide SRE production support for Mainframe applications, APIs, Web Services, and Microservices.
Troubleshoot incidents, outages, batch failures, API failures, performance issues, and integration problems.
Support Mainframe technologies including z/OS, MVS, CICS, MQ, DB2, COBOL, JCL, TSO/ISPF, Easytrieve, IBM Utilities, SORT, FileAid, Xpediter, ChangeMan, AbendAid, and related tools.
Monitor and manage batch processing using scheduling tools such as Zeke, Zena, CA7, Control‑M, or equivalent.
Support and troubleshoot REST APIs, SOAP Web Services, API Gateways, Middleware platforms, and Microservices, including authentication, SSL/TLS, performance, and integration issues.
Support API modernization initiatives, including SOAP‑to‑REST migrations, API onboarding, production cutovers, and post‑implementation stabilization.
Validate JSON/XML payloads, request/response mappings, and API data transformation issues.
Support API testing and troubleshooting using Postman, SoapUI, Swagger/OpenAPI, or similar tools.
Work closely with Development teams during migration, deployment, cutover, and stabilization activities.
Build and enhance monitoring, alerting, dashboards, observability, and self‑healing capabilities.
Utilize monitoring tools such as Dynatrace, Splunk, Grafana, Azure Monitor, AppDynamics, CloudWatch, or equivalent.
Drive process enhancements, streamline communication, and optimize delivery through innovative practices from discovery to deployment.
Drive automation, eliminate operational toil, improve availability, and reduce recurring incidents.
Perform Root Cause Analysis (RCA), problem management, and continuous service improvement initiatives.
Manage customer‑impacting incidents, technical escalations, vendor engagements, and business communications.
Support production releases, deployments, change management activities, and post‑deployment validation.
Maintain runbooks, knowledge articles, support documentation, and operational procedures.
Collaborate with Infrastructure, Cloud, Development, Middleware, and Vendor teams to ensure system reliability and availability.
Coordinate with various teams to document production issues requiring code fixes and assist with validating and closing defects.
Support message‑based integration technologies such as IBM MQ, Kafka, Event Hub, or similar enterprise messaging platforms.
Ensure adherence to SLA, SLO, availability, performance, and operational excellence targets.