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Mainframes Developer Jobs in Delaware (NOW HIRING)

AceStack LLC

Mainframe developer

Newark, DE · On-site

$48 - $61.75/hr

Mainframes, Cobol, JCL, DB2 Secondary: Agile, CICS Experience: 7 to 10+ years Job Summary We are seeking a Senior Mainframe Developer with deep expertise in IBM mainframe technologies to design ...

iTech US, Inc.

Mainframe Developer

Wilmington, DE · On-site

$47.50 - $61/hr

Mainframe Developer Location : Wilmington, DE Type : Contract Essential Skills: 10 years experience overall in Mainframe Experience in Mainframe COBOL,. Strong experience in CICS & MQ Excellent ...

Lorven Technologies

Mainframe Developer

Wilmington, DE · On-site

$47.50 - $61/hr

Mainframe Developer Location: Wilmington, Delaware (Onsite) Job Type: Contract Responsibilities: Primary Skill: VSAM, COBOL, DevOps * Design, code, test, and maintain mainframe applications using ...

Lorven Technologies

Mainframe Developer

Wilmington, DE · On-site

$47.50 - $61.25/hr

Mainframe Developer Location: Wilmington, Delaware (Onsite) Job Type: Contract Responsibilities: Primary Skill: VSAM, COBOL, DevOps * Design, code, test, and maintain mainframe applications using ...

Kaav Inc.

Mainframe Developer (COBOL/IMS/CICS)

Wilmington, DE · On-site

$47.50 - $61/hr

Mainframe Developer (COBOL/IMS/CICS) Location: Onsite - Wilmington, DE Duration: Long Term We are seeking an experienced Mainframe Developer with strong expertise in COBOL, IMS/DB, CICS, and JCL to ...

VIS IT Solutions Inc

Mainframe Developer

Wilmington, DE · On-site

$47.50 - $61.25/hr

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 ...

Donato Technologies, Inc

Mainframe Developer

Wilmington, DE · On-site

$47.50 - $61.25/hr

Mainframe Developer Wilmington DE Experience: 8+ Years All over USA Mandatory Skills- * COBOL, MQ, JCL, DB2, CICS, VSAM * Working on enterprise-wide applications, Agile methodologies Process Skills:

Sincera Technologies, Inc.

Mainframe Developer

Wilmington, DE · On-site

$47.50 - $61/hr

Buffalo, NY or Willington, DE We are seeking an experienced Mainframe Developer with strong handson expertise in COBOL, JCL, and DB2 to support, enhance, and modernize enterprisescale mainframe ...

Zortech Solutions

Mainframe Developer

Wilmington, DE · On-site

$47.50 - $61/hr

Mainframe Developer Location: Wilmington, DE/Plano, TX/Columbus, OH (Day 1 Onsite) Duration: 6-12+ Months * Fully participates in development, testing, implementation, and support of mainframe COBOL ...

Hirekeyz Inc

Mainframe Developer

Wilmington, DE · On-site

$47.50 - $61.25/hr

Mainframe Developer Location : Wilmington DE Job Type: Contract/W2 Experience: 8+ Years Mandatory Skills- COBOL, MQ, JCL, DB2, CICS, VSAM Working on enterprise-wide applications, Agile methodologies ...

Hirekeyz Inc

Mainframe Developer

Wilmington, DE · On-site

$47.50 - $61.25/hr

Mainframe Developer Location : Wilmington DE Job Type: W-2/Full Time Required Skills: • Mandatory Skills- COBOL, MQ, JCL, DB2, CICS, VSAM Working on enterprise-wide applications, Agile ...

Kanak Elite Services Inc

Mainframe IMS and CICS

Wilmington, DE · On-site

$47.50 - $61.25/hr

Mainframe Developer - IMS and CICS Location : Wilmington, DE Onsite - Relocation from nearby states only Duration : Long term contract Required Skills: * Programming Languages: Strong proficiency in ...

Galent

Senior mainframe developer

Wilmington, DE · On-site

Job title: Sr Mainframe Developer Role is onsite (5 days/wk) Client Location: Wilmington, DE Years of experience required: 8+ · Develops and implements solutions that address complex business ...

Xforia, Inc.

Mainframe Developer

Wilmington, DE · On-site

$47.50 - $61.25/hr

Job Title: Mainframe Developer Location : Wilmington DE Experience - 8+ - 5 Days Onsite MF JD: Mandatory Skills- COBOL, MQ, JCL, DB2, CICS, VSAM Working on enterprise-wide applications, Agile ...

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Mainframes Developer information

What does a mainframe developer do?

A mainframe developer designs, codes, tests, and maintains applications running on mainframe computers, often using languages like COBOL, PL/I, or Assembler. They work in environments that require high reliability and security, and may also handle system updates, performance tuning, and integration with other systems.

What is mainframe developer salary?

The salary for a mainframe developer typically ranges from $70,000 to $120,000 annually, depending on experience, location, and certifications. Senior roles or those with specialized skills in COBOL, JCL, or mainframe environments may earn higher compensation. Many positions also offer benefits such as health insurance and retirement plans.

Can mainframe be replaced by AI?

Mainframes are large-scale computing systems used for critical enterprise applications, and while AI can automate certain tasks and improve efficiency, it does not replace the core functions of mainframes. Mainframe developers often work with legacy systems, COBOL programming, and security protocols, which require specialized skills that are not fully replaced by AI technologies.

Is mainframe still in demand?

Mainframes remain in demand for large enterprises such as banks, insurance companies, and government agencies that rely on their reliability, security, and processing power. Mainframe developers with skills in COBOL, JCL, and mainframe environments are sought after to maintain and upgrade legacy systems, though the overall demand has decreased as organizations adopt cloud and distributed computing. Certification and experience with mainframe tools can enhance job prospects in this specialized field.

What is the difference between Mainframes Developer vs Mainframes Analyst?

AspectMainframes DeveloperMainframes Analyst
Required CredentialsTypically a degree in Computer Science or related field; certifications like IBM Certified SpecialistSimilar credentials; often holds certifications in mainframe systems and analysis
Work EnvironmentDevelops, codes, and tests mainframe applications in a software development settingAnalyzes existing mainframe systems, gathers requirements, and supports system improvements
Employer & Industry UsageUsed by banks, insurance companies, and large enterprises for application developmentEmployed in similar industries for system analysis, troubleshooting, and process optimization

While both roles require knowledge of mainframe systems and similar credentials, Mainframes Developers focus on creating and maintaining mainframe applications, whereas Mainframes Analysts analyze existing systems to improve performance and efficiency. Both roles are vital in large enterprise IT environments.

What are popular job titles related to Mainframes Developer jobs in Delaware? For Mainframes Developer jobs in Delaware, the most frequently searched job titles are:
What job categories do people searching Mainframes Developer jobs in Delaware look for? The top searched job categories for Mainframes Developer jobs in Delaware are:
Mainframes Developer jobs near you
Infographic showing various Mainframes Developer job openings in Delaware as of June 2026, with employment types broken down into 43% Full Time, and 57% Contract. Highlights an 100% In-person job distribution.
Mainframe developer

Mainframe developer

AceStack LLC

Newark, DE • On-site

$48 - $61.75/hr

Other

Posted 7 days ago

Key responsibilities

  • Design, develop, test, and maintain mainframe applications using COBOL, PLI, and JCL.

  • Maintain and enhance existing legacy systems to ensure performance, reliability, and scalability.

  • Debug production issues and perform root-cause analysis.

Job description

Senior Mainframe Developer

Role: Mainframe developer Employment Type: Full-Time Location: Charlotte, NC /Newark, DE / Plano, TX

Primary Skill: Mainframes, Cobol, JCL, DB2

Secondary: Agile, CICS

Experience: 7 to 10+ years

Job Summary We are seeking a Senior Mainframe Developer with deep expertise in IBM mainframe technologies to design, develop, maintain, and modernize mission-critical enterprise applications.

The ideal candidate will play a key role in system stability, performance optimization, and mentoring junior developers while collaborating with cross-functional teams.

Key Responsibilities

  • Design, develop, test, and maintain mainframe applications using COBOL, PLI, and JCL. Analyze business requirements and translate them into technical solutions.
  • Maintain and enhance existing legacy systems to ensure performance, reliability, and scalability.
  • Debug production issues and perform root-cause analysis.
  • Optimize batch and online processing for efficiency and reliability.
  • Work with DB2, IMS, VSAM, and other mainframe data stores.
  • Participate in system upgrades, migrations, and modernization initiatives.
  • Ensure compliance with security, audit, and regulatory standards. Provide technical leadership and mentor junior developers.
  • Collaborate with QA, operations, business analysts, and infrastructure teams.

Required Qualifications

  • 7 years of hands-on mainframe development experience. Strong proficiency in COBOL and JCL.
  • Experience with CICS and/or IMS transaction processing.
  • Solid knowledge of DB2 and SQL.
  • Experience working in large-scale batch and online systems.
  • Strong problem-solving and analytical skills.
  • Excellent communication and documentation abilities.
  • Preferred Qualifications Experience with PLI, REXX, or Assembler.
  • Exposure to mainframe modernization or cloud integration projects.
  • Familiarity with DevOps tools (Endevor, Changeman, Git, CICD pipelines).
  • Knowledge of financial, insurance, healthcare, or government systems.
  • Experience working in Agile or SAFe environments.

Technical Skills

  • OS IBM zOS Languages COBOL, JCL, CICS, IMS Data DB2, VSAM Tools Batch scheduling tools (e.g., Control-M, CA-7) Other Debugging and performance tuning tools Soft Skills Leadership and mentoring. Strong attention to detail. Ability to work independently and in team environments.
AceStack logo

About AceStack

Sourced by ZipRecruiter

AceStack is a global IT consulting & Staffing agency. We deal in Health care (Nursing, Allied, Clinical/Non-clinical) Staffing, Engineering Staffing & I.T. Staffing. Founded in 2017 in New Jersey, AceStack has reported consistent growth and profit every year and carries zero debt. AceStack consultants are placed across USA, Canada, Mexico, and Asia. In addition to our headquarters in New Jersey – USA, we also have offices in Canada, Noida, and Ahmedabad. AceStack’s exceptionally high-touch service keeps our clients satisfied and our Consultants/Travelers engaged. We believe in investing in our Consultants/Clients in a variety of ways. We employ AceStack ambassador who helps guide Consultants through the on-boarding process and ensure the transition into their new role with our Client is seamless. We also have dedicated Consultant care representatives located throughout our organization who provide the same level of attention throughout our Consultant’s tenure. Due to this level of attention and care, AceStack enjoys not only one of the highest retention rates in the staffing industry but also one of the highest redeployment rates in the industry.

Company size

51 - 200 Employees

Headquarters location

NJ, US

Year founded

2017

Social media

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