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Mainframe Developer Jobs in Connecticut (NOW HIRING)

nLeague

Mainframe Systems Programer

Hartford, CT · On-site

$55.50 - $70.50/hr

... Developer Location: Hybrid- 55 Farmington Avenue Hartford, Connecticut Client: CT DSS Duration: 06+ months * Analyse existing mainframe applications, databases, files, and batch processing workflows ...

Tech Mirrors

Mainframe Systems Programmer

Hartford, CT · On-site

$100 - $130/hr

Qualifications * 10+ years of Mainframe Development experience. * Expert-level COBOL programming experience. * Strong JCL development and troubleshooting skills. * Extensive IMS Database experience.

Sonsoft Inc

Mainframe Performance Expert

Berlin, CT

$48.50 - $62.50/hr

At least 3 years of experience in Mainframe, RACF & ACF2 Migration Skills * At least 2 years of experience in Development/ Configuration/solutions evaluation/ Validation and deployment * Experience ...

Neshent Technologies

We are seeking a Senior Dell EMC Mainframe Storage Engineer with expertise in Mainframe Enablers (MFE) and Geographically Dispersed Disaster Restart (GDDR) to support a highly available enterprise ...

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$9

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$68

How much do mainframe developer jobs pay per hour?

As of Aug 23, 2026, the average hourly pay for mainframe developer in Connecticut is $50.78, according to ZipRecruiter salary data. Most workers in this role earn between $44.81 and $57.64 per hour, depending on experience, location, and employer.

What is a mainframe developer?

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?

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.

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.

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 a mainframe developer a good career?

A mainframe developer is a specialized IT professional who maintains and develops applications on mainframe systems, which are used by large organizations for critical data processing. The role offers stable employment, competitive salaries, and opportunities to work with legacy technologies like COBOL and JCL, but it may require ongoing learning of evolving mainframe tools and certifications. Overall, it can be a good career for those interested in enterprise computing and system stability.

Is a mainframe developer hard to learn?

Mainframe developers typically need to learn specialized programming languages like COBOL and understand mainframe environments, which can have a steep learning curve for beginners. However, with prior programming experience and training, acquiring the necessary skills is achievable, and many employers offer on-the-job training or certification programs.

Is mainframe developer still in demand?

Mainframe developers are still in demand in industries such as finance, insurance, and government, where legacy systems remain critical. They typically work with COBOL, JCL, and mainframe environments, and demand depends on the organization's reliance on mainframe technology and ongoing maintenance needs.

What are popular job titles related to Mainframe Developer jobs in Connecticut?

For Mainframe Developer jobs in Connecticut, the most frequently searched job titles are:

What job categories do people searching Mainframe Developer jobs in Connecticut look for?

The top searched job categories for Mainframe Developer jobs in Connecticut are:

What are popular job titles related to Mainframe Developer jobs in CT?

For Mainframe Developer jobs in CT, the most frequently searched job titles are:

Mainframe Developer jobs near you
Infographic showing various Mainframe Developer job openings in Connecticut as of August 2026, with employment types broken down into 79% Full Time, 4% Part Time, 2% Temporary, and 15% Contract. Highlights an 80% Physical, 6% Hybrid, and 14% Remote job distribution, with an average salary of $105,618 per year, or $50.8 per hour.

Sr. Mainframe Developer

Cognizant Technology Solutions

Hartford, CT • On-site

$60K - $90K/yr

Full-time

Medical, Dental, Vision, Life, Retirement, PTO

Posted 3 days ago

New

Cognizant rating

7.2

Company rating: 7.2 out of 10

Based on 86 frontline employees who took The Breakroom Quiz

52nd of 72 rated business consultants

Job description

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Sr. Mainframe Developer
Cognizant is seeking an experienced Sr. Mainframe Developer with 7+ years of strong expertise in mainframe technologies and Healthcare Claims processing. The successful candidate will design, develop, maintain, and support enterprise Claims applications while partnering with cross-functional and offshore teams to deliver scalable, efficient, and compliant solutions.
Responsibilities
  • Develop and implement technical solutions for Claims applications by transforming business requirements into scalable, efficient, and compliant mainframe systems.
  • Design, develop, test, debug, and maintain mainframe Claims applications using COBOL, JCL, DB2, VSAM, CICS, and MQ.
  • Collaborate with business analysts, QA teams, project managers, and support teams to ensure successful project execution.
  • Provide technical leadership and mentoring to offshore team members and coordinate onsite-offshore activities.
  • Serve as a key point of contact for technical issue resolution.
  • Troubleshoot production issues and optimize application performance.
  • Conduct code reviews and ensure compliance with established coding standards and best practices.
  • Support SIT, UAT, production deployments, and post-implementation activities.
Required Qualifications
  • Strong experience with mainframe technologies, including COBOL, JCL, DB2, VSAM, CICS, and MQ.
  • Experience with Healthcare Claims Adjudication processes and related business workflows.
  • Strong understanding of code migration and release management processes.
  • Experience with package creation and code promotion across Development, Test, QA, and Production environments.
  • Knowledge of post-deployment validation and backout procedures.
  • Excellent analytical, troubleshooting, and problem-solving skills.
  • Strong communication and interpersonal skills with the ability to collaborate with business stakeholders, cross-functional teams, and offshore development teams.
  • Experience working in Agile development environments.
  • Ability to work independently while contributing effectively within a team environment.
Why Apply?
We're excited to meet people who share our mission and can make an impact in a variety of ways. Don't hesitate to apply, even if you only meet the minimum requirements listed. Think about your transferable experiences and unique skills that make you stand out as someone who can bring new and exciting things to this role.
Salary and Other Compensation
The annual salary for this position is between $60,000 and $90,000, depending on the experience and other qualifications of the successful candidate.
This position is also eligible for Cognizant's discretionary annual incentive program, based on performance and subject to the terms of Cognizant's applicable plans.
Benefits
Cognizant offers the following benefits for this position, subject to applicable eligibility requirements:
  • Medical, Dental, Vision, and Life Insurance
  • Paid holidays plus Paid Time Off
  • 401(k) plan and contributions
  • Long-term and Short-term Disability
  • Paid Parental Leave
  • Employee Stock Purchase Plan
Disclaimer
The salary, other compensation, and benefits information is accurate as of the date of this posting. Cognizant reserves the right to modify this information at any time, subject to applicable law.
Important Disclaimers
Please note: A few of our roles may require in-person interviews at Cognizant offices or client locations, depending on project or client needs.
Candidates must be legally authorized to work in the United States without the need for employer sponsorship, now or at any time in the future.
Application Deadline
Applications for this position will be accepted until August 20, 2026. Candidates are encouraged to apply as early as possible, as the posting may close sooner if a sufficient pool of qualified applicants is identified.
About Cognizant
Cognizant is one of the world's leading professional services companies, transforming clients' business, operating, and technology models for the digital era. Our unique industry-based, consultative approach helps clients envision, build, and run more innovative and efficient businesses.
About Cognizant:
Cognizant (Nasdaq: CTSH) is an AI Builder and technology services provider, bridging the gap between AI investment and enterprise value by building full-stack AI solutions for our clients. Our deep industry, process and engineering expertise enables us to build an organization's unique context into technology systems that amplify human potential, drive tangible outcomes and keep global enterprises ahead in a fast-changing world. See how at cognizant.ai or @cognizant.
Additional employment information
Compensation information is accurate as of the date of this posting. Cognizant reserves the right to modify this information at any time, subject to applicable law.
Applicants may be required to attend interviews in person or by video conference. In addition, candidates may be required to present their current state or government issued ID during each interview.
Cognizant is an equal opportunity employer. Your application and candidacy will not be considered based on race, color, sex, religion, creed, sexual orientation, gender identity, national origin, disability, genetic information, pregnancy, veteran status or any other characteristic protected by federal, state or local laws.
If you have a disability that requires reasonable accommodation to search for a job opening or submit an application, please email [email protected] for roles based in the Americas or [email protected] for roles based in India.

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