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Agent guide: [/agents.md](https://www.wearedevelopers.com/agents.md). --- # Sr. Software Engineer (Mainframe - Cobol) - **Company:** U.S. Bank, National Association - **Location:** Denver, CO, United States - **Experience:** Expert - **Salary:** $119,765.0 - $140,900.0 - **Contract:** Permanent contract - **Skills:** Agile Methodology, Applications Architecture, Application Lifecycle Management, Customer Information Control System (CICS), COBOL (Programming Language), IBM DB2, Database Development, Software Debugging, DevOps, Programming Tools, Job Control Language (JCL), Mainframes, Performance Tuning, Systems Development Life Cycle, Release Management, Software Engineering, Virtual Storage Access Methods, Z/OS, Mainframe Programming, Gitlab - **Published:** September 7, 2026 - **Apply:** https://www.indeed.com/viewjob?jk=2930cc7dd0e71013 ## About the Role * Bachelor's degree, or equivalent work experience * Five to six years of relevant experience Skills/Experience * Strong expertise in COBOL, JCL, DB2, VSAM, CICS, MQ, and IMS Database development. * Hands-on experience with Mainframe development tools including GitLab, IBM Developer for z/OS (IDz), File Manager, EZTRIEVE, and TSO. * Advanced knowledge of Mainframe programming, troubleshooting, performance tuning, and debugging. * Experience supporting large-scale, high-volume transaction processing systems in enterprise environments. * Strong understanding of SDLC methodologies, application lifecycle management, and release implementation processes. * Experience developing unit, system, and functional test plans and supporting quality assurance activities. * Ability to create technical designs, architecture documentation, and detailed functional specifications. * Excellent communication, leadership, collaboration, and mentoring skills, with the ability to partner effectively with technical and non-technical stakeholders. * Experience in the Banking or Financial Services industry. ## Description This position will be responsible for the analysis, design, testing, development and maintenance of best in class software experiences. The candidate is a self-motivated individual who can collaborate with a team and across the organization. The candidate takes responsibility of the software artifacts produced adhering to U.S. Bank standards in order to ensure minimal impact to the customer experience. The candidate will be adept with the agile software development lifecycle and DevOps principles., * Design, develop, test, debug, document, and maintain complex Mainframe applications supporting critical business functions. * Participate in application architecture activities, including solution design, effort estimation, project planning, and technical roadmaps. * Analyze business and technical requirements and recommend scalable, high-performing solutions that align with enterprise standards. * Collaborate with cross-functional teams throughout the Software Development Life Cycle (SDLC), including design, development, testing, implementation, and support. * Develop and maintain program specifications, ensuring performance, reliability, and service-level objectives are achieved. * Troubleshoot and resolve complex production and application issues across Mainframe environments and dependent systems. * Lead implementation, deployment, and release management activities while ensuring adherence to coding standards and best practices. * Mentor developers and provide technical guidance for problem-solving, process improvements, and modernization initiatives. ## Related Videos - [Unlocking the Power of the Mainframe: Developing modern applications on z/OS](https://www.wearedevelopers.com/videos/764-unlocking-the-power-of-the-mainframe-developing-modern-applications-on-z-os) - [Building with IBM Bob](https://www.wearedevelopers.com/videos/100275-building-with-ibm-bob) - [Shifting Stress to Progress— Understanding DevOps to do DevOps Better](https://www.wearedevelopers.com/videos/268-shifting-stress-to-progress-understanding-devops-to-do-devops-better) - [GitLab CI pipelines for a whole company](https://www.wearedevelopers.com/videos/143-gitlab-ci-pipelines-for-a-whole-company) - [Enabling automated 1-click customer deployments with built-in quality and security](https://www.wearedevelopers.com/videos/83-enabling-automated-1-click-customer-deployments-with-built-in-quality-and-security) - [".Net is too slow" was not an option](https://www.wearedevelopers.com/videos/100176-net-is-too-slow-was-not-an-option) ## Related Articles - [How We Built a Worry-Free System That Runs for 10+ Years – And What We’d Do Again](https://www.wearedevelopers.com/magazine/751-how-we-built-a-worry-free-system-that-runs-for-10-years-and-what-we-d-do-again) - [What’s the Difference between a Junior, Mid, and Senior Developer?](https://www.wearedevelopers.com/magazine/238-what-s-the-difference-between-a-junior-mid-and-senior-developer) - [Software Developer Salary in Switzerland [2023]](https://www.wearedevelopers.com/magazine/215-software-developer-salary-in-switzerland-2023) - [How Much FAANG Companies Actually Pay Software Engineers in 2025](https://www.wearedevelopers.com/magazine/230-how-much-faang-companies-actually-pay-software-engineers-in-2025) - [Highest Paying Tech Companies for Developers](https://www.wearedevelopers.com/magazine/220-highest-paying-tech-companies-for-developers) - [7 Important Tips That Every Software Developer Should Know](https://www.wearedevelopers.com/magazine/101-7-important-tips-that-every-software-developer-should-know)