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Cobol 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 ...

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 ...

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 ... Perform COBOL program analysis and code modifications to support data extraction, transformation ...

ICONMA

Mainframe IT Project Manager

Hartford, CT

$99K - $117K/yr

... Programming Tools System Design Qualifications Mainframe background leveraging Cobol and Endeavor, partners with GSO team that is scaled based on demand; GSO engagement is leveraging the Project ...

CVS Health

Staff Software Development Engineer

Hartford, CT · On-site +1

$118K - $260K/yr

Position Summary As a Staff Software Development Engineer at CVS Health, you will be responsible ... Mainframe development and support, utilizing several of the following technologies: COBOL, JCL ...

All JobsCobol Mainframe Developer JobsCobol Mainframe Developer Jobs in Connecticut

Cobol Mainframe Developer information

See Connecticut salary details

$49

$52

$54

How much do cobol mainframe developer jobs pay per hour?

As of Aug 2, 2026, the average hourly pay for cobol mainframe developer in Connecticut is $52.59, according to ZipRecruiter salary data. Most workers in this role earn between $51.44 and $53.75 per hour, depending on experience, location, and employer.

What Does a COBOL Mainframe Developer Do?

As a COBOL mainframe developer, your primary responsibilities include designing new computer programs using the COBOL programming language. Your duties are to design, develop, and configure code for new programs, test these programs to make sure they function on the intended operating system, and implement adjustments needed. Once that process is complete, you launch the program for public or private use and provide support and upgrades to the user. You should have extensive knowledge and experience working with software development, and if you are working in IT for a company, you should be able to troubleshoot their current mainframe. Teaching others about what you have developed and making sure they understand how to use it are also your responsibility.

What does a COBOL Mainframe Developer do?

A COBOL Mainframe Developer is responsible for designing, developing, testing, and maintaining applications that run on mainframe computers using the COBOL programming language. These developers often work with legacy systems in industries like banking, insurance, and government, ensuring that critical business processes continue to function smoothly. Their tasks may include writing new code, updating existing programs, debugging, and integrating mainframe applications with modern technologies. COBOL Mainframe Developers also collaborate with business analysts and other IT professionals to meet organizational needs and regulatory requirements.

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

To thrive as a COBOL Mainframe Developer, you need strong proficiency in COBOL programming, mainframe systems (such as IBM z/OS), and a background in computer science or a related field. Familiarity with tools like JCL, DB2, CICS, and source control systems, along with relevant certifications, is highly beneficial. Attention to detail, problem-solving abilities, and effective communication are crucial soft skills for diagnosing issues and collaborating with cross-functional teams. These competencies ensure reliability, accuracy, and efficiency in maintaining and modernizing critical legacy systems.

What are some typical challenges faced by Cobol Mainframe Developers when maintaining legacy systems?

Cobol Mainframe Developers often encounter challenges with outdated documentation, making it difficult to understand and modify legacy code. Integrating new technologies or adapting legacy systems to modern infrastructure can also be complex, requiring careful planning and testing. Additionally, communicating with business users to gather requirements and ensure system changes meet current needs is essential, as is collaborating with other IT professionals to manage dependencies and minimize downtime. Staying proactive about learning modernization tools and approaches can help address these challenges.
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Cobol Mainframe Developer jobs near you
Infographic showing various Cobol Mainframe Developer job openings in Connecticut as of July 2026, with employment types broken down into 1% Locum Tenens, 3% Internship, 81% Full Time, 1% Part Time, 11% Contract, and 3% Nights. Highlights an 78% Physical, 3% Hybrid, and 19% Remote job distribution, with an average salary of $109,397 per year, or $52.6 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 6 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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