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Senior Mainframe Developer Jobs in Stanton, CA (NOW HIRING)

Scalence L.L.C.

Senior SQL and ETL Engineer

Downey, CA · On-site

$106K - $146K/yr

... with mainframe including data extraction, mapping, and conversion into modern ETL/ELT pipelines ... Azure DevOps CI/CD workflows. • 3 years of experience in the past 4 years building and ...

DXC Technology

Mainframe/ITOM

Los Angeles, CA · On-site

$115K - $213K/yr

Role Summary DXC Technology is seeking a Senior ITOM Engineer with deep expertise in IBM/Rocket ITOM report management tooling. This role is responsible for Product Admin report setup, configuration ...

VIRTUAL CLARITY LIMITED

Mainframe/ITOM

Los Angeles, CA · On-site

$115K - $213K/yr

Role Summary DXC Technology is seeking a Senior ITOM Engineer with deep expertise in IBM/Rocket ITOM report management tooling. This role is responsible for Product Admin report setup, configuration ...

Judge Group, Inc.

Lead Software Engineer

Newport Beach, CA · On-site

$83 - $84/hr

Partner with mainframe, data engineering, and integration teams to resolve source-data and data ... Demonstrated experience serving as a technical lead, lead developer, or senior engineer responsible ...

Unisys

Data Architect

Long Beach, CA · On-site

$67 - $86.25/hr

Working with our other architects and engineering leads to build data security, management and ... Interfaces extensively with the client's senior management team (e.g., the IT Directors) on ...

Unisys Corporation

Data Architect

Long Beach, CA · On-site

$67 - $86.25/hr

Working with our other architects and engineering leads to build data security, management and ... Interfaces extensively with the client's senior management team (e.g., the IT Directors) on ...

Unisys

Data Architect

Long Beach, CA · On-site

$67 - $86.25/hr

Working with our other architects and engineering leads to build data security, management and ... Interfaces extensively with the client's senior management team (e.g., the IT Directors) on ...

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Senior Mainframe Developer information

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How much do senior mainframe developer jobs pay per hour?

As of Sep 5, 2026, the average hourly pay for senior mainframe developer in Stanton, CA is $59.55, according to ZipRecruiter salary data. Most workers in this role earn between $55.87 and $65.05 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 cities near Stanton, CA are hiring for Senior Mainframe Developer jobs?

Cities near Stanton, CA with the most Senior Mainframe Developer job openings:

Senior Mainframe Developer jobs near you
Infographic showing various Senior Mainframe Developer job openings in Stanton, CA as of August 2026, with employment types broken down into 79% Full Time, 3% Part Time, and 18% Contract. Highlights an 81% Physical, 4% Hybrid, and 15% Remote job distribution, with an average salary of $123,866 per year, or $59.6 per hour.

Senior Software Developer, Assistant Vice President

State Street

Irvine, CA • Hybrid

$100K - $167K/yr

Full-time

Medical, Dental, Vision, Life, Retirement, PTO

Posted 5 days ago

Job description

Who wearelooking for

State Street is seeking an experiencedSenior Software Developerto join ourInvestment Book of Records (IBOR) Development Team. We are looking for a highly motivated technology professional with strong analytical, problem-solving, and software engineering skills who can contribute across both legacy and modern technology platforms.

The ideal candidate will bring deep expertise in COBOL-based application development, a passion for modernization, and the ability to collaborate effectively with business stakeholders, architects, and development teams to deliver innovative technology solutions.

Why this role is important to us

The Investment Book of Records (IBOR) platform is a critical component of State Street's investment servicing ecosystem, supporting key business functions and client operations. As State Street continues its digital transformation journey, modernizing and enhancing core applications is essential to improving scalability, resiliency, operational efficiency, and time-to-market.

What youwillbe responsible for

As Senior Software Developer, you will:

  • Lead the design, development, enhancement, and maintenance of mission-critical IBOR applications.

  • Analyze business requirements and translate them into technical solutions.

  • Develop and support enterprise applications using COBOL and related technologies.

  • Participate in application modernization initiatives, including converting and refactoring COBOL applications to Java-based solutions

  • Collaborate with solution architects, business analysts, QA teams, and infrastructure teams to deliver high-quality solutions.

  • Perform system analysis, technical design, coding, testing, and implementation activities.

  • Troubleshoot production issues and provide timely resolution for application defects.

  • Review code and technical designs to ensure adherence to development standards and best practices.

  • Contribute to application performance tuning, stability improvements, and operational excellence initiatives.

  • Support Agile development practices including sprint planning, estimation, and release activities.

  • Mentor junior developers and provide technical leadership within the team.

  • Participate in technology modernization assessments and roadmap planning.

What we value

These skills will help you succeed in this role

  • Extensive experience developing and supporting COBOL applications in enterprise environments.

  • Strong understanding of mainframe or distributed legacy application architectures.

  • Experience with application modernization and migration programs.

  • Java development experience, including object-oriented design principles.

  • Strong SQL and relational database knowledge.

  • Experience working in Unix/Linux environments.

  • Experience with source control, CI/CD, and DevOps practices. .

  • Ability to work effectively in a fast-paced, collaborative environment.

Education & Preferred Qualifications

  • Bachelor's degree in Computer Science, Engineering, Information Systems, or a related discipline.

  • 10+ years of professional software development experience.

  • Significant hands-on experience with COBOL application development and support.

  • Experience working in complex enterprise application environments.

  • Strong understanding of SDLC, Agile methodologies, and software engineering best practices.

Additional requirements

  • Ability to participate in production support activities as needed.

  • Strong organizational and prioritization skills.

  • Ability to manage multiple initiatives simultaneously.

Work Requirement

  • Onsite 4 days a week in office and one day remote

  • Standard business hours aligned to project and stakeholder needs(8am to 5pm)

Salary Range:

$100,000 - $167,500 Annual

The range quoted above applies to the role in the location specified. If the candidate would ultimately work outside of the location above, the applicable range could differ.

Employees are eligible to participate in State Street's comprehensive benefits program, which includes: our retirement savings plan (401K) with company match; insurance coverage including basic life, medical, dental, vision, long-term disability, and other optional additional coverages; paid-time off including vacation, sick leave, short term disability, and family care responsibilities; access to our Employee Assistance Program; incentive compensation including eligibility for annual performance-based awards (excluding certain sales roles subject to sales incentive plans); and, eligibility for certain tax advantaged savings plans.

For a full overview, visit https://hrportal.ehr.com/statestreet/Home.

About State Street

Across the globe, institutional investors rely on us to help them manage risk, respond to challenges, and drive performance and profitability. We keep our clients at the heart of everything we do, and smart, engaged employees are essential to our continued success.

We are committed to fostering an environment where every employee feels valued and empowered to reach their full potential. As an essential partner in our shared success, you'll benefit from inclusive development opportunities, flexible work-life support, paid volunteer days, and vibrant employee networks that keep you connected to what matters most. Join us in shaping the future.

As an Equal Opportunity Employer, we consider all qualified applicants for all positions without regard to race, creed, color, religion, national origin, ancestry, ethnicity, age, disability, genetic information, sex, sexual orientation, gender identity or expression, citizenship, marital status, domestic partnership or civil union status, familial status, military and veteran status, and other characteristics protected by applicable law.

Discover more information on jobs at StateStreet.com/careers

Read our CEO Statement

Job Application Disclosure:

It is unlawful in Massachusetts to require or administer a lie detector test as a condition of employment or continued employment. An employer who violates this law shall be subject to criminal penalties and civil liability.

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About State Street

Sourced by ZipRecruiter

State Street is one of the largest custodian banks, asset managers and asset intelligence companies in the world. From technology to product innovation, we're making our mark on the financial services industry. For more than two centuries, we've been helping our clients safeguard and steward the investments of millions of people. We provide investment servicing, data & analytics, investment research & trading and investment management to institutional clients.

Industry

Finance and insurance

Company size

10,000+ Employees

Headquarters location

Boston, MA, US

Year founded

1792

Social media

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