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Mainframes Developer Jobs in Colorado (NOW HIRING)

Huntington

Mainframe Systems Engineer III

Cambridge, OH

$153K - $181K/yr

The Mainframe Systems Engineer III candidate must have experience in one or more of the following disciplines: z/OS installation and customization, storage management, hardware configuration ...

Huntington

Mainframe Systems Engineer III

Denver, CO · On-site

$178K - $211K/yr

The Mainframe Systems Engineer III candidate must have experience in one or more of the following disciplines: z/OS installation and customization, storage management, hardware configuration ...

Visa

Lead Software Engineer

Denver, CO · Hybrid

Visa will accept applications for this role until at least 07-31-2026 As a Lead Software Engineer ... Participate in and coordinate on-call rotations to support 24x7 mainframe operations. * Guide ...

Aegon

Lead Software Engineer

Denver, CO · On-site

Summary The Lead Software Engineer mainframe and API-driven web technologies to build and support application solutions. Provides lead support for design and development to one or more application ...

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Mainframes Developer information

What does a mainframe developer do?

A mainframe developer designs, codes, tests, and maintains applications running on mainframe computers, often using languages like COBOL, PL/I, or Assembler. They work in environments that require high reliability and security, and may also handle system updates, performance tuning, and integration with other systems.

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. Senior roles or those with specialized skills in COBOL, JCL, or mainframe environments may earn higher compensation. Many positions also offer benefits such as health insurance and retirement plans.

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 often work with legacy systems, COBOL programming, and security protocols, which require specialized skills that are not fully replaced by AI technologies.

Is mainframe still in demand?

Mainframes remain in demand for large enterprises such as banks, insurance companies, and government agencies that rely on their reliability, security, and processing power. Mainframe developers with skills in COBOL, JCL, and mainframe environments are sought after to maintain and upgrade legacy systems, though the overall demand has decreased as organizations adopt cloud and distributed computing. Certification and experience with mainframe tools can enhance job prospects in this specialized field.

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 are popular job titles related to Mainframes Developer jobs in Colorado? For Mainframes Developer jobs in Colorado, the most frequently searched job titles are:
What job categories do people searching Mainframes Developer jobs in Colorado look for? The top searched job categories for Mainframes Developer jobs in Colorado are:
Mainframes Developer jobs near you
Infographic showing various Mainframes Developer job openings in Colorado as of June 2026, with employment types broken down into 34% Full Time, and 66% Contract. Highlights an 94% In-person, and 6% Hybrid job distribution.
New Job Opening - Mainframe Engineer - Remote

New Job Opening - Mainframe Engineer - Remote

TriOptus LLC

Englewood, CO • On-site, Remote

$48.50 - $62.25/hr

Full-time

Posted 20 days ago

Job description

Job Code - Mainframe Engineer
Work Location - Remote
Total Hours - 1 year contract initially
Description
  • IBM and IBM customer mainframe systems. Provide Tier3 host network services support in broadest sense, at expert level for host network components VTAM/SNA, TCP/IP, secure FTP, Telnet3270, SMTP, Netview, NetView/FTP, Connect Direct and XCOMetc.
  • The level of support requires understanding, knowledge and experience of IBM zSeries mainframe systems and technology, for z/OS (MVS).
  • Required competencies and knowledge and experience for the following host network components: z/OS Communication server, VTAM/SNA, APPN/EE (Enterprise Extender), TCP/IP, FTP, Including secure file transfer, Telnet 3270, incl. TLS/SSL, SMTP, Netview, NetView/FTP, and any other network component, which are defined in scope of support.

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