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Mainframes Developer Jobs in Missouri (NOW HIRING)

Mainframe Developer (Remote)

Chesterfield, MO ยท Remote

$48.50 - $62.25/hr

Mainframe Developer Location: Remote About Us : Known for "Delighting the Client" through performance, innovation, and an employee-centric culture, S2Tech is a fast-growing IT consulting company ...

Mainframe Developer (Remote)

Chesterfield, MO ยท On-site +1

$48.50 - $62.25/hr

Mainframe Developer Location: Remote About Us : Known for "Delighting the Client" through performance, innovation, and an employee-centric culture, S2Tech is a fast-growing IT consulting company ...

Mainframe CICS Programmer

Belton, MO ยท On-site

$43.50 - $55.75/hr

* Mainframe CICS Engineer * As a global financial services firm, client is committed to technological innovation. * Client relies on client technologists around the world to create leadingedge, secure ...

SRE

Saint Louis, MO ยท On-site

$55.50 - $73.50/hr

Role : SRE (Mainframe + Java + Oracle + Account Management Services) Location : St Louis, MO ( 3 days onsite/Week ) Duration: 12 Months Key Responsibilities: Site Reliability Engineering * Ensure ...

Senior, Software Engineer

Anderson, MO ยท On-site

$90K - $180K/yr

Our Mainframe Team is a high-performing, highly collaborative group responsible for supporting some of the most critical business processes across Walmart's store ecosystem. The team provides ...

Senior, Software Engineer

Noel, MO ยท On-site

$90K - $180K/yr

Our Mainframe Team is a high-performing, highly collaborative group responsible for supporting some of the most critical business processes across Walmart's store ecosystem. The team provides ...

Senior, Software Engineer

Cassville, MO ยท On-site

$90K - $180K/yr

Our Mainframe Team is a high-performing, highly collaborative group responsible for supporting some of the most critical business processes across Walmart's store ecosystem. The team provides ...

Bank is seeking a z/OS Systems Programmer that has extensive experience in mainframe technologies with an emphasis on installation/upgrading, tuning, and troubleshooting of z/OS and third-party ...

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Showing results 1-20

Mainframes Developer information

Are mainframe engineers in demand?

Mainframes developers are in steady demand due to the continued use of mainframe systems in industries like finance, government, and healthcare. They require specialized skills in COBOL, JCL, and mainframe environments, and demand often depends on the organization's reliance on legacy systems. While some companies are transitioning to newer technologies, mainframe expertise remains valuable for maintaining critical infrastructure.

What is mainframe developer salary?

The salary for a mainframe developer typically ranges from $70,000 to $120,000 annually, depending on experience, location, and certifications. Skilled developers with expertise in COBOL, JCL, and mainframe environments tend to earn higher salaries, especially in industries like finance and government. Salaries may also vary based on the complexity of projects and the employer's size.

Is mainframe developer a good career?

Mainframe developers work with large-scale computer systems used by many organizations for critical applications. The role offers stable employment, competitive salaries, and opportunities to work with legacy technologies like COBOL and JCL. As demand persists in industries such as finance and government, it can be a solid career choice for those with relevant skills and certifications.

Can mainframe be replaced by AI?

Mainframes are large-scale computing systems used for critical enterprise applications, and while AI can automate certain tasks and improve efficiency, it does not replace the core functions of mainframes. Mainframe developers focus on maintaining and optimizing these systems, often integrating AI tools to enhance performance but not replacing the hardware or fundamental role of mainframes in data processing. Skills in legacy systems, programming languages like COBOL, and system security remain essential for mainframe professionals.

What is the difference between Mainframes Developer vs Mainframes Analyst?

AspectMainframes DeveloperMainframes Analyst
Required CredentialsTypically a degree in Computer Science or related field; certifications like IBM Certified SpecialistSimilar credentials; often holds certifications in mainframe systems and analysis
Work EnvironmentDevelops, codes, and tests mainframe applications in a software development settingAnalyzes existing mainframe systems, gathers requirements, and supports system improvements
Employer & Industry UsageUsed by banks, insurance companies, and large enterprises for application developmentEmployed in similar industries for system analysis, troubleshooting, and process optimization

While both roles require knowledge of mainframe systems and similar credentials, Mainframes Developers focus on creating and maintaining mainframe applications, whereas Mainframes Analysts analyze existing systems to improve performance and efficiency. Both roles are vital in large enterprise IT environments.

What job categories do people searching Mainframes Developer jobs in Missouri look for? The top searched job categories for Mainframes Developer jobs in Missouri are:
Infographic showing various Mainframes Developer job openings in Missouri as of July 2026, with employment types broken down into 85% Full Time, 3% Part Time, 1% Temporary, and 11% Contract. Highlights an 82% Physical, 3% Hybrid, and 15% Remote job distribution.
Mainframe Developer (Remote)

Mainframe Developer (Remote)

S2Tech

Chesterfield, MO โ€ข Remote

$48.50 - $62.25/hr

Full-time

Medical, Dental, Vision, Life, Retirement, PTO

Re-posted 15 days ago


Job description

Mainframe Developer

Location: Remote

About Us:

Known for โ€œDelighting the Clientโ€ through performance, innovation, and an employee-centric culture, S2Tech is a fast-growing IT consulting company serving clients in over a quarter of the United States. We are widely recognized as a leading provider of both technical and business services in support of Health and Human Services-related projects. Feel free to learn more at www.s2tech.com.

Why S2Tech?:

  • Stable privately-owned company with a strong reputation for building long-term client relationships through the delivery of consistent value-based service
  • 25+ years providing IT and Business services to private customers and government programs throughout the United States
  • Expansive client portfolio and active projects โ€“ employees benefit from innovative project exposure and in-house skill development training/courses ย 
  • Corporate culture that emphasizes the importance of family and promotes a healthy work-life balance
  • Offer competitive pay and a range of benefits, including:
    • Medical / Dental / Vision Insurance โ€“ insurance premium assistance provided
    • Additional Insurance (Life, Disability, etc.)
    • Paid Time Off
    • 401(k) Retirement Savings Plan & Health Savings Account
    • Various training courses to promote continuous learning
    • Corporate Wellness Program
  • Be part of a company that gives back through its non-profit organization, Fortune Fund, which was launched in 2001. The goal of the Fortune Fund is to close the rural/urban divide by ensuring children in rural communities in India and the United States understand the importance of education & are aware of professional career opportunities, allowing them to link their professional & educational goals

Job Overview:

We are seeking an experienced COBOL Mainframe Developer to join our dynamic team. The ideal candidate will have a proven track record of success in designing, developing, and maintaining COBOL-based applications on mainframe systems.

Responsibilities:

  • COBOL Development: Design, code, test, and maintain COBOL programs for mainframe applications
  • Mainframe Systems: Work with mainframe systems and associated technologies to ensure optimal performance and reliability
  • Analysis and Troubleshooting: Analyze business requirements and system specifications to develop effective and efficient COBOL solutions. Identify and troubleshoot issues, providing timely resolutions
  • Collaboration: Collaborate with cross-functional teams, including business analysts, systems analysts, and other developers, to ensure seamless integration of COBOL applications within the broader IT ecosystem
  • Documentation: Create and maintain comprehensive documentation for all COBOL programs, ensuring clarity and ease of understanding for other team members
  • Testing: Conduct thorough unit testing of developed code to ensure its functionality, reliability, and compliance with established standards
  • Performance Optimization: Identify opportunities for performance optimization and implement necessary improvements to enhance the overall efficiency of COBOL applications

Qualifications:

  • Bachelor's degree in Computer Science, Information Technology, or a related field
  • Over 5 years of hands-on experience in COBOL development on mainframe systems; a strong preference for prior Medicaid experience
  • Strong knowledge of mainframe technologies and associated tools
  • Experience in working on large-scale projects with complex business logic
  • Excellent analytical and problem-solving skills
  • Strong communication and interpersonal skills
  • Ability to work independently and as part of a collaborative team
  • Detail-oriented with a commitment to producing high-quality code

S2Tech is committed to hiring and retaining a diverse workforce. We are an equal opportunity employer making decisions without regard to age, race, color, religion, sex, sexual orientation, gender identity, national origin, disability, veteran status, or any other protected class.