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Senior Mainframe Developer Jobs in California (NOW HIRING)

Mainframe Specialist

Los Angeles, CA · On-site

$70K - $196K/yr

Partner with cross-functional teams-architects, developers, QA, and business analysts-to gather ... Collaborate with senior leadership to secure executive sponsorship and organizational buy-in for ...

Mainframe Specialist

Mountain View, CA · On-site

$70K - $196K/yr

Partner with cross-functional teams-architects, developers, QA, and business analysts-to gather ... Collaborate with senior leadership to secure executive sponsorship and organizational buy-in for ...

Mainframe Specialist

San Francisco, CA · On-site

$70K - $196K/yr

Partner with cross-functional teams-architects, developers, QA, and business analysts-to gather ... Collaborate with senior leadership to secure executive sponsorship and organizational buy-in for ...

Mainframe Specialist

Sacramento, CA · On-site

$70K - $196K/yr

Partner with cross-functional teams-architects, developers, QA, and business analysts-to gather ... Collaborate with senior leadership to secure executive sponsorship and organizational buy-in for ...

Mainframe Specialist

San Diego, CA · On-site

$70K - $196K/yr

Partner with cross-functional teams-architects, developers, QA, and business analysts-to gather ... Collaborate with senior leadership to secure executive sponsorship and organizational buy-in for ...

Mainframe Specialist

Irvine, CA · On-site

$70K - $196K/yr

Partner with cross-functional teams-architects, developers, QA, and business analysts-to gather ... Collaborate with senior leadership to secure executive sponsorship and organizational buy-in for ...

Mainframe Specialist

Walnut Creek, CA · On-site

$70K - $196K/yr

Partner with cross-functional teams-architects, developers, QA, and business analysts-to gather ... Collaborate with senior leadership to secure executive sponsorship and organizational buy-in for ...

We are seeking a dynamic Senior QA Engineer to join our R&D team. In this pivotal role, you will be ... Work Experience: 5+ or more years of experience in Mainframe software development or a related ...

Fortune 1000 enterprises run mission-critical workloads on decades-old mainframe systems -- COBOL ... owners to senior IT leadership. * Deeply understand each customer's legacy environment and ...

Director, Engineering

Santa Clara, CA · On-site

$189K - $260K/yr

Director, Platform Engineering Vacuum and Atmospheric Mainframe, EFEM, Robotics, and Controls Platforms Summary Provides leadership and direction through managers and senior technical leaders for the ...

Director, Engineering

Santa Clara, CA · On-site

$189K - $260K/yr

Director, Platform Engineering Vacuum and Atmospheric Mainframe, EFEM, Robotics, and Controls Platforms Summary Provides leadership and direction through managers and senior technical leaders for the ...

Showing results 21-40

Senior Mainframe Developer information

See California salary details

$37

$56

$65

How much do senior mainframe developer jobs pay per hour?

As of Sep 5, 2026, the average hourly pay for senior mainframe developer in California is $56.90, according to ZipRecruiter salary data. Most workers in this role earn between $53.37 and $62.16 per hour, depending on experience, location, and employer.

What is a senior mainframe developer?

Senior Mainframe Developers are experienced professionals who design, develop, and maintain mainframe systems—large-scale computers used by organizations for critical applications, bulk data processing, and enterprise resource planning. They are proficient in languages like COBOL, JCL, and Assembler, and often work with databases and transaction processing systems. Their responsibilities include troubleshooting system issues, optimizing performance, mentoring junior developers, and ensuring the reliability and security of mainframe operations.

What are some common challenges faced by senior mainframe developers when integrating legacy systems with modern technologies?

Senior Mainframe Developers often encounter challenges when integrating legacy mainframe systems with newer technologies such as cloud platforms, APIs, or microservices. These challenges include ensuring data consistency, maintaining system security, and minimizing downtime during migrations. Collaboration with cross-functional teams, such as infrastructure engineers and application developers, is key to developing seamless integration solutions. Staying up-to-date with modernization tools and best practices can help address these complexities and support the organization's digital transformation goals.

What are the key skills and qualifications needed to thrive as a senior mainframe developer, and why are they important?

To thrive as a Senior Mainframe Developer, you need deep expertise in mainframe programming languages (like COBOL, JCL, and PL/I), systems analysis, and a strong understanding of legacy application architectures, typically supported by a degree in computer science or related experience. Familiarity with tools such as IBM z/OS, DB2, CICS, and version control systems is essential, along with relevant certifications like IBM Certified System Programmer. Excellent problem-solving, communication, and leadership skills help you collaborate effectively and mentor junior developers. These skills are crucial for maintaining mission-critical systems, ensuring reliability, and guiding modernization efforts in complex enterprise environments.

What are the most commonly searched types of Mainframe Developer jobs in California?

The most popular types of Mainframe Developer jobs in California are:

What job categories do people searching Senior Mainframe Developer jobs in California look for?

The top searched job categories for Senior Mainframe Developer jobs in California are:

What cities in California are hiring for Senior Mainframe Developer jobs?

Cities in California with the most Senior Mainframe Developer job openings:

Infographic showing various Senior Mainframe Developer job openings in California as of August 2026, with employment types broken down into 79% Full Time, 8% Part Time, and 13% Contract. Highlights an 81% Physical, 5% Hybrid, and 14% Remote job distribution, with an average salary of $118,346 per year, or $56.9 per hour.

Sr. COBOL / Mainframe Developer with PEP+ Exp.

krg technology inc

San Diego, CA

$52 - $67/hr

Contractor

Re-posted 23 days ago


Job description

Company Description

shijo

KRG Technologies, Inc.,

shijo(at)krgtech.com

25000 Avenue Stanford, Suite #243, Valencia, CA 91355

Direct : 661-367-8000 Ext : 203


Job Description

PEP+ Development exp is must 


Location: San Diego, CA or Phoenix, AZ

Duration: 3-6 months CTH with Cognizant


  • 7 or more years of Development exp in COBOL / Mainframe background
  • 4 or more years of exp in PEP+ development/Service Pack 12, 13
  • Experience with PEP+ OFAC Module and PEP+ Exchange desirable
  • 2 or more years of CICS experience
  • DB2 strong understand preferred
Additional Information

All your information will be kept confidential according to EEO guidelines.


KRG Technologies logo

About KRG Technologies

Sourced by ZipRecruiter

KRG Technologies was founded with a simple motive of offering the clients exactly what they want, how they want and when they want. By leveraging for its clients its technological edge and right-sourcing advantage, KRG in a short period of time has grown to become one of the most trusted strategic technology partners. Treating every client as the top priority, we customize our solutions and services to align with the unique needs of each client. Headquartered in Valencia, California, KRG employs a unique global delivery platform to minister its offerings spanning from application development and maintenance to business process reengineering. With years of hands-on domain experience and international presence, we offer state-of-the-art solutions backed by our follow-the-sun service model in the most cost effective manner. We value our clientele for the trust reposed in us and our clientele admire us for our personalized approach and deep commitment to their success. Our biggest strength lies in technical expertise of our team and individual competency of our employees, which enables us to be the most befitting solution provider.

Industry

It services

Company size

201 - 500 Employees

Headquarters location

Valencia, CA, US

Year founded

2003

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