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Mainframe Systems Programmer Jobs in California (NOW HIRING)

West Advanced Technologies

Mainframe Admin

Downey, CA · On-site

Required Skills: 1. Five (5) years of experience within the last seven (7) years with IBM zEnterprise mainframe implementing MultiPath Channel (MPC) alternate routing links in a systems programming ...

WATI

Mainframe Applications Programmer

Sacramento, CA · On-site

Mainframe Applications Programmer Sacramento, CA Long-term The client hosts a number of critical enterprise applications on mainframe system including the Criminal Justice Information System (CJIS)

WATI

Mainframe Admin

Norwalk, CA · On-site

Mainframe Admin Location: Norwalk, CA Duration: 12 Months Minimum Skills: * Bachelor of Science ... Computer Science, Information Technology, Information Systems, Computer Engineering, Software ...

eTeam Inc.

Mainframe Programmer

San Francisco, CA · On-site

Mainframe Programmer Job Role: Mainframe Programmer Duration: 6 months with possible extension Location: Irving, TX, Chicago, IL, Charlotte, NC, Milwaukee, WI 53005, Atlanta, GA, New York, NY ...

U.S. Bancorp

z/OS Systems Engineer

Cupertino, CA · On-site

$105K - $124K/yr

Bank is seeking a z/OS Systems Programmer that has extensive experience in mainframe technologies with an emphasis on installation/upgrading, tuning, and troubleshooting of z/OS and third-party ...

Epic Games

Animation Systems Programmer

Larkspur, CA · On-site

$167K - $245K/yr

What You'll Do Epic Games is looking for an experienced Animation Systems Programmer for our Special Projects team. As a member of our team, you will play a critical role in driving future projects ...

U.S. Bank

z/OS Systems Engineer

Cupertino, CA · On-site

Bank is seeking a z/OS Systems Programmer that has extensive experience in mainframe technologies with an emphasis on installation/upgrading, tuning, and troubleshooting of z/OS and third-party ...

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Mainframe Systems Programmer information

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How much do mainframe systems programmer jobs pay per hour?

As of Jul 6, 2026, the average hourly pay for mainframe systems programmer in California is $57.41, according to ZipRecruiter salary data. Most workers in this role earn between $52.21 and $66.44 per hour, depending on experience, location, and employer.

Are mainframe jobs in demand?

Mainframe systems programmers are in steady demand due to the continued reliance of large organizations on mainframe infrastructure for critical applications. Skills in COBOL, JCL, and mainframe security are highly valued, and many companies seek experienced professionals to maintain and upgrade legacy systems. The demand remains stable, especially in finance, government, and healthcare sectors that depend on mainframe technology.

What does a mainframe systems programmer do?

A mainframe systems programmer is responsible for installing, maintaining, and troubleshooting mainframe operating systems and software. They configure hardware, optimize system performance, and ensure security and reliability, often using tools like z/OS and JCL. Strong knowledge of system architecture and scripting is essential for this role.

Can mainframe be replaced by AI?

Mainframe systems programmers manage and maintain large-scale mainframe environments that run critical enterprise applications. While AI can automate certain tasks like monitoring and troubleshooting, it is unlikely to fully replace the specialized skills required for mainframe system programming, which involves complex configuration, security, and performance tuning. Mainframes remain essential in industries with high-volume transaction processing, and programmers need expertise in languages like COBOL and tools such as z/OS.

What Does a Mainframe Systems Programmer Do?

As a mainframe systems programmer, your responsibilities are to maintain an organization’s server computer, also called a mainframe computer. Your duties include handling server configuration, as well as installing, upgrading, and customizing the operating system and other software necessary for running the server and its databases. You also work with other IT professionals with the planning of security measures to protect the mainframe and routinely perform tests for bugs and other security issues.

What are some common challenges Mainframe Systems Programmers face when maintaining legacy systems?

Mainframe Systems Programmers often encounter challenges related to supporting and upgrading legacy systems that may have limited documentation or use outdated programming languages. Navigating compatibility issues with newer hardware or software can require creative problem-solving and deep technical expertise. Additionally, ensuring system security and reliability while performing upgrades or patches involves careful planning and collaboration with other IT and business teams. Staying current with evolving mainframe technologies and practices is essential for long-term success in the role.

What is the difference between Mainframe Systems Programmer vs Mainframe Application Developer?

AspectMainframe Systems ProgrammerMainframe Application Developer
CredentialsTypically requires certifications like IBM Certified Systems ProgrammerOften requires programming certifications or specific language expertise
Work EnvironmentWorks primarily on system-level tasks, OS, and hardware interactionsFocuses on developing and maintaining applications on mainframe platforms
Employer & Industry UsageCommon in large enterprises with mainframe infrastructureAlso in large organizations, but more application-focused
Job FocusSystem configuration, performance tuning, and maintenanceApplication coding, testing, and deployment

The Mainframe Systems Programmer primarily manages system-level tasks, ensuring the mainframe environment runs efficiently, while the Mainframe Application Developer focuses on creating and maintaining applications. Both roles are essential in mainframe environments but differ in their technical focus and responsibilities.

What are Mainframe Systems Programmers?

Mainframe Systems Programmers are IT professionals responsible for installing, configuring, maintaining, and troubleshooting mainframe computer systems and software. They ensure that the mainframe environment runs efficiently, securely, and reliably, supporting critical business operations. Their duties often include system upgrades, performance tuning, applying patches, and collaborating with other IT teams to resolve complex technical issues. Mainframe Systems Programmers play a key role in organizations that rely on large-scale transaction processing, such as banks, insurance companies, and government agencies.

What is the salary of a mainframe developer?

The salary of a mainframe systems programmer typically ranges from $70,000 to $120,000 annually, depending on experience, location, and certifications. Senior roles or those with specialized skills in COBOL, JCL, or mainframe security may earn higher salaries. Compensation often includes benefits such as health insurance and retirement plans.

What are the key skills and qualifications needed to thrive as a Mainframe Systems Programmer, and why are they important?

To thrive as a Mainframe Systems Programmer, you need expertise in system programming, operating systems like z/OS, and strong problem-solving abilities, usually supported by a degree in computer science or related field. Familiarity with mainframe tools such as IBM z/OS utilities, JCL, REXX, and experience with system monitoring and performance tuning software are commonly required. Attention to detail, analytical thinking, and effective communication skills help ensure smooth collaboration and troubleshooting. These skills are essential to maintain, optimize, and secure critical enterprise computing environments that rely on mainframe infrastructure.
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Mainframe Systems Programmer jobs near you
Infographic showing various Mainframe Systems Programmer job openings in California as of June 2026, with employment types broken down into 50% Full Time, and 50% Contract. Highlights an 100% In-person job distribution, with an average salary of $119,422 per year, or $57.4 per hour.
COBOL Mainframe Programmer/Developer - Atlanta, GA - (JK)

COBOL Mainframe Programmer/Developer - Atlanta, GA - (JK)

Central Business Solutions

Newark, CA • On-site

$55 - $70.75/hr

Full-time

Posted 15 days ago

Job description


We are seeking an experienced COBOL Developer to support and enhance enterprise mainframe applications. The ideal candidate will work on maintaining legacy systems, developing new functionalities, and supporting critical business operations in a fast-paced environment.
Key Responsibilities:
  • Develop, maintain, and enhance COBOL-based mainframe applications.
  • Analyze business and technical requirements to implement system changes.
  • Work with JCL, DB2, VSAM, CICS, and batch processing environments.
  • Troubleshoot production issues, perform debugging, and provide system support.
  • Participate in code reviews, testing, deployment, and documentation activities.
  • Collaborate with cross-functional teams including analysts, QA, and support teams.
  • Support system modernization and performance improvement initiatives.

Required Skills:
  • Strong experience in COBOL programming on mainframe systems.
  • Hands-on experience with JCL, DB2, CICS, VSAM, and batch jobs.
  • Knowledge of SDLC, software maintenance, and production support processes.
  • Ability to analyze and resolve complex technical issues.
  • Good communication and teamwork skills.

Preferred Qualifications:
  • Experience in banking, insurance, healthcare, or financial services domains.
  • Exposure to Agile methodologies and DevOps practices.
  • Familiarity with mainframe modernization projects is a plus.

Apply