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Senior Mainframe Developer Jobs in California (NOW HIRING)

Senior QE Engineer III

Sacramento, CA

$94K - $128K/yr

... web-based, mainframe-based and three-tier architectures. * Experience with the following ... Senior QA Engineer -AI & Engineering Join our AI & Engineering team in transforming technology ...

Senior QE Engineer III

San Francisco, CA

$104K - $141K/yr

... web-based, mainframe-based and three-tier architectures. * Experience with the following ... Senior QA Engineer -AI & Engineering Join our AI & Engineering team in transforming technology ...

Senior Engineer - LLMOps & MLOps

Los Angeles, CA · On-site +1

$112K - $154K/yr

... Services & Insurance Senior Engineer - LLMOps & MLOps Role Overview This is a high-stakes ... Build the engineering "pipes" to securely ingest and move data from legacy systems (Mainframes, SQL ...

Senior QE Engineer III

Costa Mesa, CA

$94K - $128K/yr

... web-based, mainframe-based and three-tier architectures. * Experience with the following ... Senior QA Engineer -AI & Engineering Join our AI & Engineering team in transforming technology ...

Senior QE Engineer III

San Jose, CA

$103K - $140K/yr

... web-based, mainframe-based and three-tier architectures. * Experience with the following ... Senior QA Engineer -AI & Engineering Join our AI & Engineering team in transforming technology ...

Senior QE Engineer III

Costa Mesa, CA · On-site

$94K - $128K/yr

Senior QA Engineer -AI & Engineering Join our AI & Engineering team in transforming technology ... web-based, mainframe-based and three-tier architectures. * Experience with the following:

Sr. IT Auditor

Foster City, CA · On-site

$109K - $143K/yr

... mainframe, or Hadoop. * Experience in working on audit project teams in a complex operational and ... Engineering, or Math). * Experience evaluating system controls associated with complex business ...

Senior QE Engineer III

Los Angeles, CA

$95K - $129K/yr

... web-based, mainframe-based and three-tier architectures. * Experience with the following ... Senior QA Engineer -AI & Engineering Join our AI & Engineering team in transforming technology ...

Sr. IT Auditor

Foster City, CA · Hybrid

$109K - $143K/yr

... mainframe, or Hadoop. * Experience in working on audit project teams in a complex operational and ... Engineering, or Math). * Experience evaluating system controls associated with complex business ...

... Mainframe type systems.It is built as a modern distributed architecture based on micro services ... Senior DevOps leaders with significant experience in building cloud-based platforms either in ...

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Senior Mainframe Developer information

See California salary details

$37

$56

$65

How much do senior mainframe developer jobs pay per hour?

As of Jun 15, 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.
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 are popular job titles related to Senior Mainframe Developer jobs in California? For Senior Mainframe Developer jobs in California, the most frequently searched job titles 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:
Senior QE Engineer III

Senior QE Engineer III

Deloitte

Sacramento, CA

$94K - $128K/yr

Other

Posted 3 days ago


Deloitte rating

8.1

Company rating: 8.1 out of 10

Based on 86 frontline employees who took The Breakroom Quiz

58th of 138 rated financial services


Job description

Senior QA Engineer -AI & Engineering

Join our AI & Engineering team in transforming technology platforms, driving innovation, and helping make a significant impact on our clients' success. You'll work alongside talented professionals reimagining and re-engineering operations and processes that are critical to business. Your contributions can help clients improve financial performance, accelerate new digital ventures, and fuel growth through innovation.
AI & Engineering leverages cutting-edge engineering capabilities to build, deploy, and operate integrated/verticalized sector solutions in software, data, AI, network, and hybrid cloud infrastructure. These solutions are powered by engineering for business advantage, transforming mission-critical operations. We enable clients to stay ahead with the latest advancements by transforming engineering teams and modernizing technology & data platforms. Our delivery models are tailored to meet each client's unique requirements.
Engineering as a Service provides complete design, implementation, and technology operations, leveraging our core engineering expertise. We transform engineering teams, modernize technology, and deliver complex programs with a product engineering approach. Our flexible delivery models-traditional teams, pools, or pods-are tailored to each client's needs, offering engineering-led advisory, implementation, and operational capabilities to accelerate innovation.

Work You'll Do

As an SDET III, you will bring considerable technical expertise to deliver effective solutions to clients including the following:

  • Acting as the lead, interfacing between clients and our Deloitte teams.
  • Helping to create testing solutions to meet our clients' business needs.
  • Leading the testing of custom technology solutions.

Required Qualifications and Experience

  • 6+ years' relevant consulting or industry experience.
  • Bachelor's degree in computer science, engineering or a related field.
  • 4+ years hands-on experience defining the testing strategy for large scale programs and ensuring requirements traceability throughout the system development lifecycle. Experience should include leading the testing efforts, including experience with all phases of testing: system integration, user acceptance, and performance testing.
  • Experience with at least two of the following: TOSCA, TMO, mobile testing, automation testing, SAP testing, data testing in a client-facing or industry role.
  • 4+ years' experience driving the quality assurance processes and gaining delivery and buy-in from executive leadership.
  • 2+ years' experience leading teams - onshore, offshore and nearshore.
  • Experience with Test and Defect Management tools - MicroFocus, ALM, JIRA.
  • 4+ years' experience working in a testing role in different environments including the following: client server, service-oriented architecture, web-based, mainframe-based and three-tier architectures.
  • Experience with the following: MicroFocus UFT, Rational Tooling, and Open Source Automation Tools such as Selenium, Cucumber, OpSoapUI, PostMan, RESTAssured, Mockito.
  • Experience in at least one Scripting language - Shell, VBScript, Perl or Python.
  • Experience with Source Control Systems - SVN or GIT.
  • Experience with Build tools - Maven, CircleCI.
  • Experience with Automated Reporting.
  • Experience with Cloud testing, API testing
  • Experience with CI/CD/CT tools - Jenkins, Bamboo, Quickbuild.
  • Experience using AI tools and prompts to improve efficiencies in the QE space.
  • Ability to travel up to 50% of the time, based on the work you do and the clients and industries/sectors you serve.

Preferred Qualifications and Experience

  • Experience working in Cloud, Web and Mobile Testing platforms - Saucelabs, Browerstack are preferred.
  • Hands-on experience with machine learning models.
  • Experience in Python NLTK or similar natural language processing technology.
  • Experience implementing testing best practices specific to the test planning and execution processes and gaining buy-in for changes from executives.
  • A deep understanding of testing planning and associated delivery challenges.
  • A strong understanding of the various approaches used in testing techniques - white-box, black-box, load testing, coverage testing and regression testing.

Sponsorship:

  • Limited immigration sponsorship may be available.

Wages + Salary

The wage range for this role takes into account the wide range of factors that are considered in making compensation decisions including but not limited to skill sets; experience and training; licensure and certifications; and other business and organizational needs. The disclosed range estimate has not been adjusted for the applicable geographic differential associated with the location at which the position may be filled. At Deloitte, it is not typical for an individual to be hired at or near the top of the range for their role and compensation decisions are dependent on the facts and circumstances of each case. A reasonable estimate of the current range is $105,400 to $207,800.

You may also be eligible to participate in a discretionary annual incentive program, subject to the rules governing the program, whereby an award, if any, depends on various factors, including, without limitation, individual and organizational performance.

Qualifications:

Senior QA Engineer -AI & Engineering

Join our AI & Engineering team in transforming technology platforms, driving innovation, and helping make a significant impact on our clients' success. You'll work alongside talented professionals reimagining and re-engineering operations and processes that are critical to business. Your contributions can help clients improve financial performance, accelerate new digital ventures, and fuel growth through innovation.
AI & Engineering leverages cutting-edge engineering capabilities to build, deploy, and operate integrated/verticalized sector solutions in software, data, AI, network, and hybrid cloud infrastructure. These solutions are powered by engineering for business advantage, transforming mission-critical operations. We enable clients to stay ahead with the latest advancements by transforming engineering teams and modernizing technology & data platforms. Our delivery models are tailored to meet each client's unique requirements.
Engineering as a Service provides complete design, implementation, and technology operations, leveraging our core engineering expertise. We transform engineering teams, modernize technology, and deliver complex programs with a product engineering approach. Our flexible delivery models-traditional teams, pools, or pods-are tailored to each client's needs, offering engineering-led advisory, implementation, and operational capabilities to accelerate innovation.

Work You'll Do

As an SDET III, you will bring considerable technical expertise to deliver effective solutions to clients including the following:

  • Acting as the lead, interfacing between clients and our Deloitte teams.
  • Helping to create testing solutions to meet our clients' business needs.
  • Leading the testing of custom technology solutions.

Required Qualifications and Experience

  • 6+ years' relevant consulting or industry experience.
  • Bachelor's degree in computer science, engineering or a related field.
  • 4+ years hands-on experience defining the testing strategy for large scale programs and ensuring requirements traceability throughout the system development lifecycle. Experience should include leading the testing efforts, including experience with all phases of testing: system integration, user acceptance, and performance testing.
  • Experience with at least two of the following: TOSCA, TMO, mobile testing, automation testing, SAP testing, data testing in a client-facing or industry role.
  • 4+ years' experience driving the quality assurance processes and gaining delivery and buy-in from executive leadership.
  • 2+ years' experience leading teams - onshore, offshore and nearshore.
  • Experience with Test and Defect Management tools - MicroFocus, ALM, JIRA.
  • 4+ years' experience working in a testing role in different environments including the following: client server, service-oriented architecture, web-based, mainframe-based and three-tier architectures.
  • Experience with the following: MicroFocus UFT, Rational Tooling, and Open Source Automation Tools such as Selenium, Cucumber, OpSoapUI, PostMan, RESTAssured, Mockito.
  • Experience in at least one Scripting language - Shell, VBScript, Perl or Python.
  • Experience with Source Control Systems - SVN or GIT.
  • Experience with Build tools - Maven, CircleCI.
  • Experience with Automated Reporting.
  • Experience with Cloud testing, API testing
  • Experience with CI/CD/CT tools - Jenkins, Bamboo, Quickbuild.
  • Experience using AI tools and prompts to improve efficiencies in the QE space.
  • Ability to travel up to 50% of the time, based on the work you do and the clients and industries/sectors you serve.

Preferred Qualifications and Experience

  • Experience working in Cloud, Web and Mobile Testing platforms - Saucelabs, Browerstack are preferred.
  • Hands-on experience with machine learning models.
  • Experience in Python NLTK or similar natural language processing technology.
  • Experience implementing testing best practices specific to the test planning and execution processes and gaining buy-in for changes from executives.
  • A deep understanding of testing planning and associated delivery challenges.
  • A strong understanding of the various approaches used in testing techniques - white-box, black-box, load testing, coverage testing and regression testing.

Sponsorship:

  • Limited immigration sponsorship may be available.

Wages + Salary

The wage range for this role takes into account the wide range of factors that are considered in making compensation decisions including but not limited to skill sets; experience and training; licensure and certifications; and other business and organizational needs. The disclosed range estimate has not been adjusted for the applicable geographic differential associated with the location at which the position may be filled. At Deloitte, it is not typical for an individual to be hired at or near the top of the range for their role and compensation decisions are dependent on the facts and circumstances of each case. A reasonable estimate of the current range is $105,400 to $207,800.

You may also be eligible to participate in a discretionary annual incentive program, subject to the rules governing the program, whereby an award, if any, depends on various factors, including, without limitation, individual and organizational performance.

Education:Bachelor's DegreeEmployment Type:

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