Overnight Remote Mainframe Developer Jobs in Connecticut

About the role
As a Senior Mainframe Developer, you will make an impact by designing, enhancing, and supporting reliable healthcare claims applications that help enable accurate and efficient claims processing. You will be a valued member of the Application Development and Maintenance team and work collaboratively with business analysts, quality assurance professionals, project managers, support teams, and onsite and offshore engineers.
In this role, you will:
• Design, develop, test, debug, and maintain healthcare claims applications using COBOL, JCL, DB2, VSAM, CICS, and MQ.
• Translate business requirements into scalable, efficient, and compliant mainframe solutions that support claims adjudication workflows.
• Troubleshoot production issues, optimize application performance, conduct code reviews, and implement sustainable fixes.
• Support system integration testing, user acceptance testing, code migration, production deployment, post-implementation validation, and backout activities.
• Provide technical leadership to offshore team members, coordinate onsite and offshore delivery, and collaborate with cross-functional stakeholders to achieve project goals.
Work model: Remote
We strive to provide flexibility wherever possible. Based on this role's business requirements, this is a remote position open to qualified applicants in the United States. Regardless of your working arrangement, we are here to support a healthy work-life balance through our various wellbeing programs.
Please note: A few of our roles may require in-person interviews at Cognizant offices or client locations, depending on project or client needs.
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:
• 8+ years of strong hands-on experience developing mainframe applications with COBOL, JCL, DB2, VSAM, CICS, and MQ.
• Experience with healthcare claims adjudication processes and related business workflows.
• Knowledge of code migration and release management, including package creation, environment promotion, deployment validation, and backout procedures.
• Strong analytical, troubleshooting, and problem-solving skills for complex application and production issues.
• Strong communication and collaboration skills, with the ability to work independently and contribute effectively in an Agile, onsite and offshore delivery environment.
*Please note, this role cannot offer visa transfer or sponsorship now or in the future*
These will help you stand out:
• Experience providing technical guidance or mentoring to distributed engineering teams.
• Experience conducting code reviews and improving mainframe application performance.
• Experience supporting system integration testing, user acceptance testing, production deployments, and post-production activities.
• Ability to communicate technical concepts clearly to business and technology stakeholders.
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.
Salary and compensation:
The annual salary for this position will be between $65,000 to $117,000 per year depending on the experience and other qualifications of the successful candidate. This position is also eligible for Cognizant's discretionary annual incentive program and stock awards, based on performance and subject to the terms of Cognizant's applicable plans.
Applications will be received by September 14 th , 2026.
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.
Disclaimer: The salary, other compensation, and benefits 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.
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.