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Mainframe Development Jobs in New York (NOW HIRING)

COBOL Developer - Remote

New York, NY · Remote

$100 - $150/hr

Annotate COBOL scripts and technical content to support the development of high-quality AI training datasets. * Design and review test cases and scenarios representing real-world COBOL and mainframe ...

Mainframe Engineer

Livingston, NJ · On-site

$53.50 - $68.75/hr

Provide application development community support to identify and resolve programming and ... Strong preference with mainframe automation and monitoring tools such as Control/M/R/O, Mainview.

... Development Services. We help organizations build high-performing technology teams by connecting ... Mainframe Systems Manager Location: Manhattan, New York, NY - Hybrid Work Arrangement: 4 Days ...

Mainframe Developer

New York, NY · On-site

$120K - $155K/yr

Hartford, CT Experience * 12+ Years of Mainframe Application Development, Modernization, Reverse Engineering, and Legacy System Analysis. Role Summary We are seeking an experienced Senior Mainframe ...

Mainframe Developer

Manhattan, NY · On-site

$125 - $150/hr

Location: Hartford, CT Experience12+ Years of Mainframe Application Development, Modernization, Reverse Engineering, and Legacy System Analysis.Role SummaryWe are seeking an experienced Senior ...

Hartford, CT Experience * 12+ Years of Mainframe Application Development, Modernization, Reverse Engineering, and Legacy System Analysis. Role Summary We are seeking an experienced Senior Mainframe ...

Mainframe Engineer

Livingston, NJ

$53.50 - $68.75/hr

Provide application development community support to identify and resolve programming and ... Strong preference with mainframe automation and monitoring tools such as Control/M/R/O, Mainview.

Lead Mainframe Developer

Jersey City, NJ · On-site

$53.75 - $69/hr

... development. • Collaborate with cross-functional teams to integrate distributed technologies and AI tools into mainframe systems, enhancing functionality and efficiency. • Ensure compliance with ...

Lead Mainframe Developer

Jersey City, NJ · On-site

$53.75 - $69/hr

... development. • Collaborate with cross-functional teams to integrate distributed technologies and AI tools into mainframe systems, enhancing functionality and efficiency. • Ensure compliance with ...

Mainframe Developer

New York, NY · On-site

$53.50 - $69/hr

... Ensure developed code aligns with system architecture and integration design standards ... mainframe processes and resolve technical issues. - Follow development best practices and maintain ...

Mainframe Engineer

Jersey City, NJ · On-site

$51.25 - $65.75/hr

Hands on experience on mainframe projects ... The role includes responsibilities like Design, Development, testing, deployment and deployment ...

Showing results 21-40

Mainframe Development information

What is the difference between Mainframe Development vs Mainframe Testing?

AspectMainframe DevelopmentMainframe Testing
Primary FocusDesigning, coding, and maintaining mainframe applicationsVerifying and validating mainframe applications for bugs and performance
Required SkillsCOBOL, JCL, DB2, CICSTesting tools, scripting, debugging, knowledge of mainframe environments
Work EnvironmentDevelopment teams, coding in mainframe environmentsQuality assurance teams, testing labs, mainframe systems
CertificationsCOBOL certifications, IBM mainframe certificationsISTQB, mainframe testing certifications

While Mainframe Development involves creating and maintaining mainframe applications, Mainframe Testing focuses on ensuring those applications work correctly and efficiently. Both roles require knowledge of mainframe environments and related skills, but they serve different stages in the software lifecycle.

Is mainframe development a good career?

Mainframe development is a stable career with high demand in industries like finance and government that rely on legacy systems. It requires knowledge of languages such as COBOL and tools like JCL, and often offers competitive salaries and job security due to the specialized skills involved.

Is mainframe development still in demand?

Mainframe development remains in demand in industries such as finance, government, and healthcare that rely on legacy systems for critical operations. Skilled mainframe developers with knowledge of COBOL, JCL, and mainframe environments are sought after to maintain and modernize these systems, ensuring their continued relevance in enterprise IT infrastructure.

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 typically collaborate with system administrators and analysts to ensure smooth operation of enterprise systems.

What cities in New York are hiring for Mainframe Development jobs?

Cities in New York with the most Mainframe Development job openings:

Infographic showing various Mainframe Development job openings in New York as of August 2026, with employment types broken down into 1% As Needed, 81% Full Time, 16% Part Time, and 2% Contract. Highlights an 90% Physical, 3% Hybrid, and 7% Remote job distribution.

Mainframe Software Development Engineer

Berkeley Heights, NJ • On-site

$109K - $182K/yr

Full-time

Re-posted 3 days ago


Key responsibilities

  • Design, develop, and implement mainframe software applications that support business goals and client needs.

  • Collaborate with cross-functional teams to gather requirements, translate them into technical specifications, and validate design understanding.

  • Develop, test, debug, and support applications to ensure reliable performance and support system testing.


Job description

Calling all innovators - find your future at Fiserv.

We're Fiserv, a global leader in Fintech and payments, and we move money and information in a way that moves the world. We connect financial institutions, corporations, merchants and consumers to one another millions of times a day - quickly, reliably, and securely. Any time you swipe your credit card, pay through a mobile app, or withdraw money from the bank, we're involved. If you want to make an impact on a global scale, come make a difference at Fiserv.

Job Title

Mainframe Software Development Engineer

What does a successful Mainframe Software Development Engineer do at Fiserv?
A successful Mainframe Software Development Engineer at Fiserv designs, develops and maintains high-quality software applications that support business goals and client needs. They work across teams to turn business requirements into technical solutions, while ensuring application performance, reliability and architectural alignment. They also strengthen team delivery by maintaining existing applications, supporting defect analysis and mentoring developers through peer reviews and technical guidance.

What you will do?

  • Lead the design, development and implementation of mainframe software applications that support business goals and client needs.
  • Collaborate with architects, team leads, business analysts and cross-functional partners to gather requirements, translate them into technical specifications and validate design understanding.
  • Develop, code, test and debug applications that meet design and architectural requirements, support system testing and ensure reliable performance.
  • Enhance and maintain existing application software, assess the impact of changes across the application, lead peer reviews and provide ongoing support for internally developed applications.
  • Communicate development status regularly, mentor junior developers and assist the production support team with defect analysis.

What you must have?

  • 5+ years of experience with COBOL, DB2, BMS Maps, VSAM, JCL and IBM Utilities.
  • 5+ years of experience with IBM Mainframes and the TSO/ISPF development environment.
  • 5+ years of experience with Endevor or a similar source control application.
  • 5+ years of experience in software design principles and software architecture.

What would be nice to have?

  • 2+ years of experience with PEP+ Mainframe ACH Software.
  • 1+ year of experience with Agile or Kanban development methodologies and JIRA.
  • 1+ year of experience with IBM DEBUG, File Manager, CLIST or REXX in high-volume transaction processing or financial services environments

Salary Range

$109,000.00 - $182,400.00

These pay ranges apply to employees in New Jersey and New York. Pay ranges for employees in other states may differ.

It is unlawful to discriminate against a prospective employee due to the individual's status as a veteran.

For incentive eligible associates, the successful candidate is eligible for an annual incentive opportunity which may be delivered as a mix of cash bonus and equity awards in the Company's sole discretion.

Thank you for considering employment with Fiserv. Please:

  • Apply using your legal name
  • Complete the step-by-step profile and attach your resume (either is acceptable, both are preferable).

Our commitment to Equal Opportunity:

Fiserv is proud to be an Equal Opportunity Employer. All qualified applicants will receive consideration for employment without regard to race, color, religion, national origin, gender, gender identity, sexual orientation, age, disability, protected veteran status, or any other category protected by law.

If you have a disability and require a reasonable accommodation in completing a job application or otherwise participating in the overall hiring process, please contactAskHR.US@fiserv.com. Please note our AskHR representatives do not have visibility to your application status. Current associates who require a workplace accommodation should refer to Fiserv's Disability Accommodation Policy for additional information.

Note to agencies:

Fiserv does not accept resume submissions from agencies outside of existing agreements.Please do not send resumes to Fiserv associates. Fiserv is not responsible for any fees associated with unsolicited resume submissions.

Warning about fake job posts:

Please be aware of fraudulent job postings that are not affiliated with Fiserv. Fraudulent job postings may be used by cyber criminals to target your personally identifiable information and/or to steal money or financial information. Any communications from a Fiserv representative will come from a legitimate Fiserv email address.