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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 ...

3B Staffing LLC

Java Developer

Hartford, CT · On-site

$51.50 - $66.50/hr

Java Developer Location: Hartford, CT Duration: 1 Year Requirement: Overall 3+ years IT experience ... IBM Mainframe; COBOL/IMS DB/CICS

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 Jul 27, 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 Systems Programmer

Mainframe Systems Programmer

InstantServe LLC

Hartford, CT • On-site

$55.50 - $70.50/hr

Full-time

Posted 9 days ago

Job description

Job Title: Mainframe Systems Programmer - Hybrid (Connecticut)
Location: Hybrid - Connecticut (Local Candidates Only)
Duration: Long-Term Contract
Job Overview
The Connecticut Department of Social Services (DSS) is seeking an experienced Mainframe Systems Programmer to support a large-scale enterprise data migration and legacy modernization initiative. This role requires a senior-level professional with extensive hands-on experience in mainframe technologies, data conversion, system analysis, and batch processing environments. The selected candidate will play a key role in analyzing legacy applications, extracting and converting data, and supporting migration efforts from IMS-based systems to modern target platforms.
Key Responsibilities
  • Analyze and document existing legacy mainframe applications and business processes.
  • Design, develop, and execute data extraction, conversion, and migration solutions.
  • Modify, maintain, and enhance COBOL programs and JCL scripts to support migration activities.
  • Work extensively with IMS databases, including data analysis, validation, and reconciliation.
  • Develop and execute batch processing solutions and troubleshoot production issues.
  • Utilize FTP/SFTP processes for secure file transfers and data movement.
  • Perform data validation, quality assurance, and reconciliation between source and target systems.
  • Support testing activities, including unit, integration, system, and user acceptance testing.
  • Create technical documentation, migration procedures, and operational support materials.
  • Collaborate with business stakeholders, technical teams, and project management throughout the migration lifecycle.
  • Identify and resolve complex system and data-related issues independently.
Required Qualifications
  • 10+ years of experience as a Mainframe Systems Programmer or Mainframe Developer.
  • Strong hands-on experience with:
    • COBOL
    • JCL (Job Control Language)
    • IMS Database
    • Mainframe Development and Support
  • Experience performing data extraction, conversion, migration, and reconciliation activities.
  • Strong knowledge of batch processing environments and scheduling.
  • Experience with FTP/SFTP file transfer processes.
  • Proven ability to analyze and troubleshoot complex legacy systems.
  • Strong documentation, communication, and problem-solving skills.
  • Ability to work independently in a fast-paced project environment.
Preferred Qualifications
  • Experience with BMC Utilities for IMS.
  • Experience using File-AID, EZtrieve, CLIST, and REXX.
  • Prior involvement in legacy modernization or large-scale data migration projects.
  • Experience in government, healthcare, insurance, or financial services environments.
  • Familiarity with enterprise data integration and modernization initiatives.
Additional Information
  • Hybrid work arrangement within Connecticut.
  • Candidates must currently reside in Connecticut.
  • Strong preference for candidates with prior state government or public sector experience.
  • Immediate interviews for qualified local candidates.
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About InstantServe

Sourced by ZipRecruiter

InstantServe provides a one-stop solution to all Healthcare, IT/Non-IT Staffing needs. Established in 2016, InstantServe is a strong workforce of over 100+ go-getters with a demonstrated background in IT/Non-IT service. We are a nationally certified SBE from the Department of Administration (State of PA). As a proud Minority Woman Owned Small Business Enterprise (M/WBE), InstantServe boasts of a strong team of professionals who have extensive experience catering to several Federal, Public, Commercial, and Healthcare Clients which includes 26 States and 46 government agencies. InstantServe is a client-centric organization that offers cost-effective and reliable solutions. Client satisfaction is sacrosanct! Our team strives to provide the best staffing and IT solutions to take your business to the next level.

Industry

Recruiting and staffing services

Company size

11 - 50 Employees

Headquarters location

Wayne, PA, US

Year founded

2016

Social media

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