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Mainframes 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 ...

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 · On-site

$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 ...

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

Are mainframe engineers in demand?

Mainframes developers are in steady demand due to the continued use of mainframe systems in industries like finance, government, and healthcare. They require specialized skills in COBOL, JCL, and mainframe environments, and demand often depends on the organization's reliance on legacy systems. While some companies are transitioning to newer technologies, mainframe expertise remains valuable for maintaining critical infrastructure.

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. Skilled developers with expertise in COBOL, JCL, and mainframe environments tend to earn higher salaries, especially in industries like finance and government. Salaries may also vary based on the complexity of projects and the employer's size.

Is mainframe developer a good career?

Mainframe developers work with large-scale computer systems used by many organizations for critical applications. The role offers stable employment, competitive salaries, and opportunities to work with legacy technologies like COBOL and JCL. As demand persists in industries such as finance and government, it can be a solid career choice for those with relevant skills and certifications.

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 focus on maintaining and optimizing these systems, often integrating AI tools to enhance performance but not replacing the hardware or fundamental role of mainframes in data processing. Skills in legacy systems, programming languages like COBOL, and system security remain essential for mainframe professionals.

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 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 July 2026, with employment types broken down into 49% Full Time, and 51% Contract. Highlights an 88% In-person, 2% Hybrid, and 10% Remote job distribution.

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

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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.

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