Mainframe System Programmer Jobs in California (NOW HIRING)

Are you an experienced, passionate pioneer in technology who wants to work in a collaborative environment? As an experienced Mainframe Developer,you will have the ability to share new ideas and collaborate on projects as a consultant without the extensive demands of travel. The Project Delivery Talent Model is designed for professionals with specialized skills that align to a current client need. Team members focus on delivering services to clients, without additional expectations related to business development or promotion. Their employment is tied to their role on a project, and they are eligible for a benefits package that is competitive for project delivery-focused professionals.

Work you'll do/Responsibilities  

• Responsible for the daily development, maintenance, and support of the mainframe health claims applications.
• Develop, test, and deploy code changes for claims processing systems based on technical specifications.
• Monitor daily batch jobs and resolve ABENDs within defined SLA timelines.
• Assist in unit and integration testing of new healthcare compliance updates.
• Maintain accurate technical documentation and runbooks for the Operate team.

The Team 

Our 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.

Recruiting for this role ends on June 10th, 2026

Qualifications 

 Required 

• 4+ years of experience in software, systems, or embedded engineering
• 4+ years of experience in Mainframe application development (COBOL, JCL, DB2).
• Experience with incident and change management processes (e.g., ServiceNow).
• Bachelor's degree, preferably in Computer Science, Information Technology, Computer Engineering, or related IT discipline; or equivalent experience
• Limited immigration sponsorship may be available

• Ability to travel 10%, on average, based on the work you do and the clients and industries/sectors you serve

Qualifications 

 Preferred  

• Experience in the healthcare/insurance domain

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 $74,900.00-$147,600.00.

Are you an experienced, passionate pioneer in technology who wants to work in a collaborative environment? As an experienced Mainframe Developer,you will have the ability to share new ideas and collaborate on projects as a consultant without the extensive demands of travel. The Project Delivery Talent Model is designed for professionals with specialized skills that align to a current client need. Team members focus on delivering services to clients, without additional expectations related to business development or promotion. Their employment is tied to their role on a project, and they are eligible for a benefits package that is competitive for project delivery-focused professionals.

Work you'll do/Responsibilities  

• Responsible for the daily development, maintenance, and support of the mainframe health claims applications.
• Develop, test, and deploy code changes for claims processing systems based on technical specifications.
• Monitor daily batch jobs and resolve ABENDs within defined SLA timelines.
• Assist in unit and integration testing of new healthcare compliance updates.
• Maintain accurate technical documentation and runbooks for the Operate team.

The Team 

Our 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.

Recruiting for this role ends on June 10th, 2026

Qualifications 

 Required 

• 4+ years of experience in software, systems, or embedded engineering
• 4+ years of experience in Mainframe application development (COBOL, JCL, DB2).
• Experience with incident and change management processes (e.g., ServiceNow).
• Bachelor's degree, preferably in Computer Science, Information Technology, Computer Engineering, or related IT discipline; or equivalent experience
• Limited immigration sponsorship may be available

• Ability to travel 10%, on average, based on the work you do and the clients and industries/sectors you serve

Qualifications 

 Preferred  

• Experience in the healthcare/insurance domain

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 $74,900.00-$147,600.00.