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Mainframe Developer Jobs in Colorado (NOW HIRING)

FortyAU

Software Developer

Denver, CO · On-site

$70K - $150K/yr

Founded by developers for developers, our team is solely focused on solving problems by writing great code for our clients. We look for versatile developers that understand code at a fundamental ...

Leidos

Software Developer

Colorado Springs, CO

$87K - $157K/yr

Software Developer Location: Colorado Springs, CO Make an Impact with Leidos! Leidos Defense Sector has an opportunity in the Integrated Tactical Warning/Attack Assessment (ITW/AA) and Missile ...

Leidos

Software Developer

Colorado Springs, CO · On-site

$87K - $157K/yr

Software Developer Location: Colorado Springs, CO Make an Impact with Leidos! Leidos Defense Sector has an opportunity in the Integrated Tactical Warning/Attack Assessment (ITW/AA) and Missile ...

Leidos

Software Developer

Colorado Springs, CO · On-site

$87K - $157K/yr

Software Developer Location: Colorado Springs, CO Make an Impact with Leidos! Leidos Defense Sector has an opportunity in the Integrated Tactical Warning/Attack Assessment (ITW/AA) and Missile ...

Leidos

Software Developer

Colorado Springs, CO · On-site

$87K - $157K/yr

Software Developer Location: Colorado Springs, CO Make an Impact with Leidos! Leidos Defense Sector has an opportunity in the Integrated Tactical Warning/Attack Assessment (ITW/AA) and Missile ...

Leidos

Software Developer

Colorado Springs, CO · On-site

$87K - $157K/yr

Software Developer Location: Colorado Springs, CO Make an Impact with Leidos! Leidos Defense Sector has an opportunity in the Integrated Tactical Warning/Attack Assessment (ITW/AA) and Missile ...

Leidos

Software Developer

Colorado Springs, CO · On-site

$87K - $157K/yr

Software Developer Location: Colorado Springs, CO Make an Impact with Leidos! Leidos Defense Sector has an opportunity in the Integrated Tactical Warning/Attack Assessment (ITW/AA) and Missile ...

Auria

Software Developer

Colorado Springs, CO · On-site

$70K - $135K/yr

Auria is looking to hire a Software Developer to support the development of the Wideband Global Satellite Communications (SATCOM) (WGS) F11 Global SATCOM Configuration Control Element (GSCCE). The ...

United Launch Alliance

Strength Analyst 3

Centennial, CO · On-site

$99K - $166K/yr

The engineer must be able to work independently and coordinate their efforts across their ... Unix/Linux mainframe based analysis tools * MathCad * ABAQUS * Matlab * MS office (word, excel, ppt ...

Dassault Systèmes

Software Developer

Broomfield, CO · On-site

Dassault Systèmes is a leader in 3D modeling solutions, and they are seeking a Software Developer to enhance their CGM solution. The successful applicant will work on geometric modeling algorithms ...

3ds

Software Developer

Broomfield, CO · On-site

$125K - $155K/yr

With CGM, software developers can create and open CAD and polyhedral models, modify queries, and prepare for all kinds of analysis. The successful applicant will contribute improvements to this ...

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All JobsMainframe Developer JobsMainframe Developer Jobs in Colorado

Mainframe Developer information

See Colorado salary details

$10

$56

$76

How much do mainframe developer jobs pay per hour?

As of Jun 19, 2026, the average hourly pay for mainframe developer in Colorado is $56.13, according to ZipRecruiter salary data. Most workers in this role earn between $49.52 and $63.70 per hour, depending on experience, location, and employer.

What is the salary of a mainframe developer?

The salary of 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 security may earn higher compensation.

What is the difference between Mainframe Developer vs Mainframe Analyst?

AspectMainframe DeveloperMainframe Analyst
Primary RoleDesigning, coding, and testing mainframe applicationsAnalyzing and maintaining existing mainframe systems
Skills & CertificationsCOBOL, JCL, DB2, certifications like IBM Certified DeveloperCOBOL, JCL, system analysis, troubleshooting skills
Work EnvironmentDevelopment teams, coding in mainframe environmentsSupport teams, system analysis, user support
Industry UsageFinancial services, insurance, government agenciesFinancial institutions, healthcare, government agencies

While Mainframe Developers focus on creating and implementing mainframe applications, Mainframe Analysts primarily analyze, troubleshoot, and maintain existing systems. Both roles require similar technical skills and often work within the same industries, but their core responsibilities differ in development versus support and analysis.

Is mainframe hard to learn?

Mainframe development can be challenging for beginners due to its specialized programming languages like COBOL and its unique environment. However, with dedicated training and practice, many developers can acquire the necessary skills to work effectively on mainframe systems.

What are some common challenges Mainframe Developers face when integrating legacy systems with modern applications?

Mainframe Developers often encounter challenges such as ensuring compatibility between legacy systems and newer technologies, managing data migration without disrupting business operations, and maintaining the security of sensitive data. Effective communication with cross-functional teams, such as application developers and infrastructure engineers, is essential to address these challenges. Staying updated on both mainframe and modern programming practices helps ease integration and ensures long-term system reliability.

Is mainframe still in demand?

Mainframe developers are still in demand due to the continued reliance of many large organizations on mainframe systems for critical operations. Skills in COBOL, JCL, and mainframe security are valuable, and demand persists in industries like finance, insurance, and government. However, the overall number of roles is smaller compared to other modern development environments.

What are Mainframe Developers?

Mainframe Developers are specialized software engineers who design, develop, maintain, and troubleshoot applications on mainframe computer systems, such as IBM's z/OS. They typically work with languages like COBOL, JCL, and CICS, and are responsible for ensuring the performance, security, and reliability of mission-critical business applications. Mainframe Developers are commonly employed in industries like banking, insurance, and government, where large-scale, high-volume transaction processing is essential.

What are the key skills and qualifications needed to thrive as a Mainframe Developer, and why are they important?

To thrive as a Mainframe Developer, you need expertise in programming languages such as COBOL, JCL, and SQL, along with a strong understanding of mainframe operating systems and batch processing concepts. Familiarity with tools like IBM z/OS, DB2, CICS, and version control systems is typically required, and certifications from IBM or related organizations can be beneficial. Strong problem-solving abilities, attention to detail, and effective communication skills help Mainframe Developers excel in troubleshooting and collaborating with cross-functional teams. These skills are crucial for maintaining, optimizing, and modernizing legacy systems that are vital to many large organizations’ operations.

Can mainframe be replaced by AI?

Mainframe developers work with large-scale, legacy systems that require specialized knowledge of mainframe environments, programming languages, and security protocols. While AI can automate certain tasks like code analysis and testing, it is unlikely to fully replace mainframe developers due to the complexity and critical nature of mainframe systems. Instead, AI tools are used to augment their work and improve efficiency.
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Mainframe Developer jobs near you
Infographic showing various Mainframe Developer job openings in Colorado as of June 2026, with employment types broken down into 79% Full Time, 14% Part Time, and 7% Contract. Highlights an 83% Physical, 7% Hybrid, and 10% Remote job distribution, with an average salary of $116,746 per year, or $56.1 per hour.
Software Developer

Software Developer

FortyAU

Denver, CO • On-site

$70K - $150K/yr

Full-time

Posted 25 days ago

Job description

FortyAU is a software consulting company in Nashville, Tennessee focused on building custom solutions for a variety of clients including Fortune 500 companies, small businesses, and dynamic start-ups. Founded by developers for developers, our team is solely focused on solving problems by writing great code for our clients. We look for versatile developers that understand code at a fundamental level and are always willing to grow and expand their skill set. We offer the opportunity to work across a variety of projects, in a supportive environment, where no two days are the same. Interested in learning more?
Who you are:

You could sit down with our team leads and talk about React, Ruby, Java, C# or other programming languages (Elixir, Swift, you-name-it!)

You've built applications and know what well-designed, testable code looks like

You love writing software, and have at least 1-2 years of experience in a workplace environment

You enjoy collaborating and working with other developers

You want the opportunity to learn new programming languages and would be excited to help others who want to learn from you

You enjoy meeting face-to-face with clients to understand their problems and design innovative solutions

What we want to know:


- Where do you excel? Tell us about your favorite programming languages and experience
- What can you show us? We would love to see your GitHub or website that shows off your skills
- What have you been up to? Send us your resume so we can get a sense of your work history

Sorry, no corp-to-corp. Must be a full time candidate with ability to work in the U.S.