ZipRecruiter

Log In

1

Mainframe Developer Jobs in Connecticut (NOW HIRING)

InstantServe LLC

Mainframe Systems Programmer

Hartford, CT · On-site

$55.50 - $70.50/hr

... Developer. * Strong hands-on experience with: * COBOL * JCL (Job Control Language) * IMS Database * Mainframe Development and Support * Experience performing data extraction, conversion, migration ...

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 ...

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 ...

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 ...

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 ...

next page

Showing results 1-20

All JobsMainframe Developer JobsMainframe Developer Jobs in Connecticut

Mainframe Developer information

See Connecticut salary details

$9

$50

$68

How much do mainframe developer jobs pay per hour?

As of Aug 3, 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 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.

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 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.
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 July 2026, with employment types broken down into 87% Full Time, 2% Part Time, 1% Temporary, and 10% Contract. Highlights an 80% Physical, 5% Hybrid, and 15% Remote job distribution, with an average salary of $105,618 per year, or $50.8 per hour.

Mainframe Developer

Cognizant Technology Solutions

Hartford, CT • On-site

$49.50 - $63.50/hr

Full-time

Medical, Dental, Vision, Life, Retirement, PTO

Posted 7 days ago

Cognizant rating

7.4

Company rating: 7.4 out of 10

Based on 85 frontline employees who took The Breakroom Quiz

52nd of 72 rated business consultants

Job description

a { text-decoration: none; color: #464feb; } tr th, tr td { border: 1px solid #e6e6e6; } tr th { background-color: #f5f5f5; }
Mainframe Developer
About the role
As a Mainframe Modernization Enterprise Architect, you will make an impact by leading the target-state architecture for a large-scale legacy modernization program across a complex portfolio of applications. You will be a valued member of the technology delivery team and work collaboratively with client stakeholders, architecture leaders, engineering teams, and GenAI-enabled delivery workstreams.
In this role, you will:
  • Own the end-to-end target-state architecture across legacy decomposition, API layer, front-end, data, cloud, and integration patterns for a portfolio of approximately 50 applications.
  • Define modernization sequencing and architecture runway based on application complexity, dependencies, risks, and business priorities.
  • Lead architecture governance, including Architecture Review Boards, solution design approvals, reusable standards, and technical decision-making across parallel teams.
  • Guide the extraction and validation of business rules, data structures, control flow, and requirements from COBOL, JCL, copybooks, CICS, VSAM/DB2, and other mainframe artifacts.
  • Define architecture and orchestration standards for Claude-based GenAI agents supporting automated COBOL rule extraction, forward engineering, Java service generation, Angular component generation, and test-case creation.
  • Establish prompt engineering standards, agent evaluation criteria, human-in-the-loop validation checkpoints, and guardrails for accuracy, auditability, and hallucination risk.
  • Define microservices, API, event-driven, Angular front-end, cloud, DevOps, observability, security, and quality standards across modernization teams.
  • Act as the technical escalation point across workstreams, tracking architecture KPIs such as extraction accuracy, code-generation acceptance rate, defect leakage, and migration velocity.
Work model
We believe hybrid work is the way forward as we strive to provide flexibility wherever possible. Based on this role's business requirements, this is a hybrid position in a client office in Hartford, CT. Regardless of your working arrangement, we are here to support a healthy work-life balance through our various wellbeing programs.
The working arrangements for this role are accurate as of the date of posting. This may change based on the project you're engaged in, as well as business and client requirements. Rest assured; we will always be clear about role expectations.
What you need to have to be considered
  • 15+ years of experience in software architecture, including 5+ years leading large-scale mainframe modernization or legacy transformation programs across multi-application portfolios.
  • Strong hands-on knowledge of legacy/mainframe technologies, including COBOL, JCL, CICS, VSAM/DB2, copybooks, batch processing, and online processing patterns.
  • Proven experience with reverse engineering, legacy code analysis, business rule extraction, requirement reconstruction, and traceability from legacy code to modern requirements.
  • Strong architecture experience with Java, Spring Boot/Spring Cloud, REST or GraphQL API design, microservices, and event-driven architecture.
  • Experience defining Angular front-end architecture, including component architecture, state management, design-system adoption, and reuse of enterprise component libraries.
  • Deep AWS cloud architecture experience across compute, storage, networking, security, IAM, CI/CD landing zones, performance, resiliency, scalability, observability, and cost optimization.
  • Experience with GenAI or agentic systems, including LLM-based agent design, prompt engineering, tool orchestration, and AI-assisted code transformation.
  • Strong leadership, documentation, stakeholder management, and technical governance skills, with the ability to align multiple teams toward a shared modernization vision.
These will help you stand out
  • Experience embedding GenAI or agentic tooling into enterprise software delivery pipelines.
  • Insurance, financial services, healthcare, or other regulated-industry modernization experience.
  • Experience with Docker, Kubernetes, ECS, EKS, Terraform, CloudFormation, DB2/VSAM data migration, and enterprise observability platforms.
  • AWS Certified Solutions Architect - Professional certification.
  • TOGAF or equivalent enterprise architecture certification.
  • Experience working in offshore/onsite distributed delivery models.

Benefits:
Cognizant offers the following benefits for this position, subject to applicable eligibility requirements:
  • Medical/Dental/Vision/Life Insurance.
  • Paid holidays plus Paid Time Off.
  • 401(k) plan and contributions.
  • Long-term/Short-term Disability.
  • Paid Parental Leave.
  • Employee Stock Purchase Plan.

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.
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.

What Cognizant employees say

Pay

Benefits

Hours and flexibility

Workplace

Get the full story on Breakroom

Apply