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Mainframe Testing Jobs in Delaware (NOW HIRING)

Mainframe Developer

Wilmington, DE · On-site

$47.50 - $61.25/hr

... testing, deployment, and support. • Troubleshoot application issues and provide timely resolutions, including root cause analysis and corrective action planning. • Optimize mainframe code and ...

Mainframe Developer

Wilmington, DE · On-site

$47.50 - $61.25/hr

... testing, deployment, and support. • Troubleshoot application issues and provide timely resolutions, including root cause analysis and corrective action planning. • Optimize mainframe code and ...

Selenium, Automation, Java Coding exp is must, API Automation, Mainframe Testing, TOSCA * Design, develop, and maintain scalable test automation frameworks and Automation background is must, get SDET ...

Mainframe IMS DB Developer

Wilmington, DE · On-site

$47.50 - $61.25/hr

Hands-on practical experience in system design, application development, testing, and operational stability * Hands-on experience in Mainframe Assembler programming, IMS, DB2 * Experience in ...

Lead Software Engineer - mainframe

Wilmington, DE · On-site

$128.10K - $213.50K/yr

Review testing methodologies and code coverage to ensure comprehensive validation; coach others on ... Extensive mainframe application development experience * Strong hands-on expertise with COBOL ...

Lead Software Engineer - mainframe

Wilmington, DE · On-site +1

$128.10K - $213.50K/yr

Review testing methodologies and code coverage to ensure comprehensive validation; coach others on ... Extensive mainframe application development experience * Strong hands-on expertise with COBOL ...

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Mainframe Testing information

What is a Mainframe Testing job?

A Mainframe Testing job involves validating and verifying applications running on mainframe systems to ensure they function correctly, efficiently, and securely. Testers perform various types of testing, including functional, integration, regression, and performance testing, using tools like JCL, COBOL, DB2, and CICS. They analyze test results, identify defects, and collaborate with developers to resolve issues. Mainframe testers need knowledge of batch processing, databases, and system interactions to ensure seamless operations. The role is critical in industries like banking, insurance, and healthcare, where mainframes handle high-volume transactions.

What are the key skills and qualifications needed to thrive in the Mainframe Testing position, and why are they important?

To thrive in Mainframe Testing, you need strong analytical abilities, a solid understanding of mainframe environments and programming languages like COBOL, JCL, and experience with testing methodologies. Familiarity with tools such as IBM Mainframe, CA7/Endevor, and mainframe testing frameworks, as well as ISTQB certification, is highly valuable. Attention to detail, strong problem-solving skills, and effective communication are essential soft skills in this role. These competencies help ensure that complex mainframe systems are thoroughly tested, reliable, and meet business requirements.

What are some common challenges faced by professionals working in Mainframe Testing?

Professionals in Mainframe Testing often encounter challenges such as understanding legacy code, dealing with limited documentation, and adapting to the evolving integration of mainframe and modern systems. Testers must also effectively validate large volumes of data, ensure compatibility across interconnected applications, and manage tight release deadlines. Collaborating closely with developers, business analysts, and operations teams is essential for clarifying requirements and troubleshooting issues. Successfully overcoming these challenges requires persistence, a willingness to learn, and strong teamwork skills.

What is a mainframe tester?

A mainframe tester is a professional who tests mainframe computer systems and applications to ensure they function correctly, securely, and efficiently. They typically use testing tools and scripting languages, and may work with legacy systems, requiring knowledge of mainframe environments like COBOL, JCL, and DB2.
What are popular job titles related to Mainframe Testing jobs in Delaware? For Mainframe Testing jobs in Delaware, the most frequently searched job titles are:
What job categories do people searching Mainframe Testing jobs in Delaware look for? The top searched job categories for Mainframe Testing jobs in Delaware are:
Infographic showing various Mainframe Testing job openings in Delaware as of May 2026, with employment types broken down into 33% Full Time, 17% Part Time, and 50% Contract. Highlights an 100% In-person job distribution.

Mainframe Developer

VIS IT Solutions Inc

Wilmington, DE • On-site

$47.50 - $61.25/hr

Contractor

Posted 10 days ago


Job description

Hi,

Please find the job description below

Position: Mainframe Developer - Day 1 Onsite

Location: Wilmington, DE & Jersey City, NJ (Weekly 5 days office is Must)

Duration: 12+ Months Contract

Skills: COBOL, JCL, CICS, IMS DB, VSAM

Key Responsibilities:

•            Design, code, test, and maintain mainframe applications using COBOL, JCL, DB2, IMS DB/DC, CICS, VSAM, and IBM MQ.

•            Develop and support batch and online processes, including job streams, transaction systems, and message-driven programs.

•            Analyze business requirements and translate them into technical specifications.

•            Participate in the full software development lifecycle (SDLC) including design, development, testing, deployment, and support.

•            Troubleshoot application issues and provide timely resolutions, including root cause analysis and corrective action planning.

•            Optimize mainframe code and database access for performance and scalability.

•            Work with system analysts, QA testers, and infrastructure teams to ensure system integrity and quality.

•            Maintain accurate and up-to-date documentation of technical designs, codebases, and processes.

•            Support production jobs and on-call troubleshooting as required.

Required Skills & Qualifications:

•            Bachelor’s degree in Computer Science, Information Systems, or related field (or equivalent experience).

•            3–8 years of hands-on experience with the following mainframe technologies:

o            COBOL (batch and online)

o            JCL (Job Control Language)

o            CICS (Customer Information Control System)

o            DB2 and/or IMS DB

o            VSAM (Virtual Storage Access Method)

o            IMS DC (Transaction Management)

o            IBM MQ (Message Queueing)

•            Familiarity with tools such as TSO/ISPF, File-AID, Abend-AID, and version control (e.g., Endevor or Changeman).

•            Strong analytical and debugging skills.

•            Ability to work independently and in a team environment.

•            Good communication skills for collaboration with business analysts and QA teams.

Preferred Qualifications:

•            Experience with mainframe modernization or integration with distributed/cloud systems.

•            Familiarity with DevOps practices or tools in the mainframe environment.

•            Exposure to agile delivery methodologies.

•            Experience in banking, insurance, or other high-volume transaction systems.