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Mainframes 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 · On-site

$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 ...

Polarits

ETL Developer

Hartford, CT · On-site

$110 - $170/hr

Job Title ETL Developer Location Hartford, CT, hybrid schedule Length 12 months+ Visa H4 EAD, GC ... This person must have strong experience and understanding of COBOL and mainframe systems, they will ...

Polar IT Services

ETL Developer

Hartford, CT · On-site +1

$51.50 - $67.25/hr

Job Title: ETL Developer Location: Hartford, CT, hybrid schedule Length: 12 months+ Visa: H4 EAD ... This person must have strong experience and understanding of COBOL and mainframe systems, they will ...

ICONMA

Mainframe IT Project Manager

Hartford, CT

$99K - $117K/yr

Our Staff Members Our in-house team offers a broad range of Information Technology, Engineering ... Mainframe IT Project Manager Location: Hartford, CT Duration: 6 months with possible contract to ...

Jobtailor

Lead RPA Developer

New Haven, CT · On-site

$120 - $180/hr

Lead and mentor developers through code reviews, coaching, and best practices. * Define coding ... Strong experience in automating SAP, legacy, and mainframe applications, including SAP GUI ...

Traka (Assa Abloy)

Lead RPA Developer

New Haven, CT · On-site

$120 - $190/hr

As **Lead RPA Developer**, you will play a critical role in delivering high-quality, scalable ... Strong experience in automating SAP, legacy, and mainframe applications, including SAP GUI ...

Assa Abloy

Lead RPA Developer

New Haven, CT · On-site

$116K - $146K/yr

As Lead RPA Developer , you will play a critical role in delivering high-quality, scalable ... Strong experience in automating SAP, legacy, and mainframe applications, including SAP GUI ...

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Mainframes Developer information

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.

Is a mainframes developer a good career?

A mainframes 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 systems and mainframe programming languages like COBOL. However, it requires specific skills and certifications, and the field may have limited growth compared to emerging technologies.

Is a mainframes developer still in demand?

Mainframes developers are still in demand in industries such as finance, government, and healthcare that rely on legacy systems. They typically work with COBOL, JCL, and mainframe environments, and demand persists due to the ongoing need to maintain and upgrade existing mainframe applications. However, the number of new positions is limited compared to emerging technologies, and skills in mainframe modernization are increasingly valued.

What does a mainframes developer do?

A mainframes developer designs, codes, tests, and maintains applications running on mainframe computers, often using languages like COBOL, PL/I, or Assembler. They ensure the stability, security, and efficiency of large-scale enterprise systems, frequently working with legacy code and mainframe-specific tools in a structured environment.

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

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

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

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

Mainframes Developer jobs near you
Infographic showing various Mainframes 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.

Sr. Mainframe Developer

Hartford, CT • On-site

Cognizant Technology Solutions

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

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Learn more about Cognizant Technology Solutionsexternal

$60K - $90K/yr

Full-time

Medical, Dental, Vision, Life, Retirement, PTO

Posted 5 days ago

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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