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Mainframe Developer Jobs in Connecticut (NOW HIRING)

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 ...

Sonsoft Inc

Datastage

Hartford, CT · On-site

Hands-on experience in integrating data from heterogeneous data sources spanning across mainframes ... Experience and understanding of in Production support and performance engineering. * Technical ...

Sonsoft Inc

Datastage

Hartford, CT · On-site

Hands-on experience in integrating data from heterogeneous data sources spanning across mainframes ... Experience and understanding of in Production support and performance engineering. * Technical ...

Unisys

Field Engineer Technician

East Hartford, CT

Serves as Field Engineer for large, complex clients and across the range of company products and ... Tests and certifies mainframes, servers and other infrastructure associated with networks and ...

Unisys

Field Engineer Technician

East Hartford, CT · On-site

What success looks like in this role: • Serves as Field Engineer for large, complex clients and ... certifies mainframes, servers and other infrastructure associated with networks and peripherals.

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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 Jul 13, 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 83% Full Time, 7% Part Time, 1% Temporary, and 9% Contract. Highlights an 82% Physical, 3% Hybrid, and 15% Remote job distribution, with an average salary of $105,618 per year, or $50.8 per hour.
Information Technology_USA - USA_Developer

Information Technology_USA - USA_Developer

Real Soft, Inc.

Hartford, CT • On-site, Remote

$50.75 - $68.50/hr

Contractor

Re-posted 16 days ago

Job description

**Please strictly adhere to the following resume naming convention:
ALL CAPS, NO SPACES BETWEEN UNDERSCORES
PTN_US_GBAMSREQID_CandidateBeelineID
Example: PTN_US_9999999_SKIPJOHNSON0413
: -
MSP Owner: Michelle Lee
Location: Hartford, CT/Remote
Duration: 6 months
skill id: 10725290
Key Responsibilities
Develop and maintain mainframe applications using:
COBOL
JCL
CICS
VSAM
on IBM mainframe systems.
Perform end-to-end development in COBOL on z/OS.
Utilize AI Copilot tools to assist with COBOL code documentation and modernization efforts.
Support and enhance existing mainframe applications while ensuring system stability and performance.
Collaborate with cross-functional teams to meet project and operational requirements.
Required Skills & Qualifications
Strong experience with IBM mainframe application development.
Hands-on expertise in:
COBOL
JCL
CICS
VSAM
Experience working with DB2, including associated daemon processes.
Exposure to or experience with the Unisys platform.
Familiarity with using AI-powered tools (Copilot) in a mainframe development context.
Strong analytical and problem-solving skills.
Essential Skills
Mainframe development using AI Copilot.
COBOL-based application enhancement and documentation.
Skills Classification
Mainframe DB2 - Application Development
System i / COBOL-400
Experience Required: 4-6, Project Code :

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