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Senior Mainframe Developer Jobs in California (NOW HIRING)

eTeam

Mainframe Developer

Concord, CA · On-site

$53.75 - $69.25/hr

Senior Mainframe COBOL Developer Location: Brookfield, WI OR Portland, OR/ Minneapolis, MN/ Irving, TX/ Atlanta, GA/ San Francisco, CA/ Concord, CA/ Denver, CO/ Cincinnati, OH/ Chicago, IL/ Charlotte ...

WATI

Sr Mainframe Systems Programmer

Downey, CA · On-site

$56.75 - $72.25/hr

Sr Mainframe Systems Programmer Location: Downey, CA, 90242 Duration: 12 Months Position ... Additional Information Please do not submit Mainframe Application developer or Team Leads or Just ...

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How much do senior mainframe developer jobs pay per hour?

As of Jul 6, 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 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 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 Senior Mainframe Developers?

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.
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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:
What are popular job titles related to Senior Mainframe Developer jobs in CA? For Senior Mainframe Developer jobs in CA, the most frequently searched job titles are:
Senior Mainframe Developer jobs near you
Infographic showing various Senior Mainframe Developer job openings in California as of June 2026, with employment types broken down into 56% Full Time, 34% Part Time, 7% Temporary, and 3% Contract. Highlights an 83% Physical, 6% Hybrid, and 11% Remote job distribution, with an average salary of $118,346 per year, or $56.9 per hour.

Senior Mainframe Developer

Futran Tech Solutions Pvt. Ltd.

San Mateo, CA • On-site

Other

Posted 25 days ago

Job description

Senior Mainframe Developer

Location: San Mateo, CA

Key Responsibilities
  • Architect and deliver mission-critical financial processing platforms, using Enterprise COBOL, JCL, CICS/IMS, and advanced DB2 engineering.
  • Own highly complex mainframe components end-to-end, applying enterprise architecture, regulated financial systems expertise, and production ownership.
  • Design and optimize ultra-high-volume batch and real-time systems, using advanced batch frameworks, scheduler integration, DB2 performance tuning, and parallel processing.
  • Build shared services, data interfaces, and reusable frameworks that enable downstream development teams, leveraging large-scale financial data engineering and reconciliation platforms.
  • Lead hybrid integration and service enablement initiatives, using MQ, Kafka, REST APIs, z/OS Connect EE, and event-driven architectures.
  • Drive modernization and DevOps enablement, applying CI/CD pipelines, automated regression testing, Git/Jenkins, and deployment automation for z/OS.
  • Engineer high-availability and resiliency solutions, using Parallel Sysplex concepts, multi-LPAR design, and disaster recovery engineering.
  • Act as a technical authority for critical system issues, performing deep root-cause analysis, performance optimization, and long-term remediation.
  • Design secure, audit-grade financial systems, leveraging RACF/ACF2, encryption, regulatory controls, data lineage, and historical replay frameworks.
  • Deliver specialized financial platform capabilities, applying rare expertise such as investment accounting system internals, asset servicing workflows, and large-scale reconciliation engines.

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