Mainframe Developer
Westlake, TX
Category: Development
Industry: Financial Services
Standard Hours: Open
Reference ID: JN -092026-108539
Date Posted: 09/09/2026
Shortcut: http://careers.eliassen.com/KcSywP
Description:
Hybrid Every Other Week onsite / 5 days in Westlake, TX
Our client seeks a Mainframe Developer to design, build, and support applications on a Z/OS platform. The team leverages financial domain expertise across demographic and financial feed processing, recordkeeping, and transaction processing. You will translate business requirements into software solutions using COBOL, DB2, CICS, JCL, and VSAM, while contributing to standards, policies, and development strategies.
Due to client requirements, applicants must be willing and able to work on a w2 basis. For our w2 consultants, we offer a great benefits package that includes Medical, Dental, and Vision benefits, 401k with company matching, and life insurance.
Rate: $50.00 to $54.00/hr. w2
Responsibilities:
- Perform as a full stack engineer, including requirements gathering, development, and testing.
- Participate in architecture design teams and help define and implement application level architecture.
- Develop applications on sophisticated projects, components, and subsystems.
- Recommend development testing tools and methodologies and review and validate test plans.
- Be responsible for QA readiness.
- Plan and conduct system testing.
- Develop comprehensive documentation for multiple applications or subsystems.
- Establish project plans for complex projects across multiple platforms.
- Plan and coordinate project schedules and assignments.
- Act as a primary liaison for business units to resolve project and technology issues.
- Provide technology solutions to daily issues and deliver technical evaluation estimates on initiatives.
- Advise senior management on technical strategy and mentor junior team members.
- Perform independent and complex technical and functional analysis for multiple projects.
- Identify opportunities to innovate and automate existing processes.
Experience Requirements:
- Five years of mainframe application development, test automation, and support using COBOL, CICS, DB2, JCL, VSAM, MQ-Series, Java, Web Services, and SQL.
- Experience developing and deploying Batch and CICS applications.
- Experience with File-Aid for file format and comparison, version management with Endevor, debugging and unit testing using Intertest and Abend-AID, and scheduling with Control-M.
- Experience analyzing and designing data flows for mainframe applications.
- Experience with performance tuning in TSO and MVS environments using Endevor, Git, ClearCase, Control-M, Abend-AID, Intertest, File-Aid, Easytrieve, and tools such as Strobe, iStrobe, Platinum Detector, and TMON to reduce I/Os, CPU time, MSUs, and MIPs.
- Experience with open source technologies such as Python.
Education Requirements:
Bachelor’s degree in Computer Science, Engineering, Information Technology, Information Systems, Mathematics, Physics, or a related field, and five years of experience in the role or in mainframe brokerage and stock plan services systems application development.
Skills, experience, and other compensable factors will be considered when determining pay rate. The pay range provided in this posting reflects a W2 hourly rate; other employment options may be available that may result in pay outside of the provided range.
W2 employees of Eliassen Group who are regularly scheduled to work 30 or more hours per week are eligible for the following benefits: medical (choice of 3 plans), dental, vision, pre-tax accounts, other voluntary benefits including life and disability insurance, 401(k) with match, and sick time if required by law in the worked-in state/locality.
If anyone reaches out to you about an open position connected with Eliassen Group, please ensure that you are working directly with us by confirming the following:
· When you work with Eliassen Group, all email communication will come from an Eliassen.com address, never Gmail, Yahoo, etc.
· Eliassen Group will never ask you for personal information (home address, bank account, or check routing number) until you have worked with someone clearly associated with Eliassen Group.
If you have any indication of fraudulent activity, please contact fraud@eliassen.com.
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Eliassen Group is an Equal Opportunity/Affirmative Action Employer. All qualified applicants will receive consideration for employment without regard to race, color, religion, sex, pregnancy, sexual orientation, gender identity, national origin, age, protected veteran status, or disability status. Eliassen Group’s Affirmative Action Plan (AAP) is available for inspection by any employee or applicant for employment upon request, during normal business hours of Monday through Friday, 8:30am to 5:30pm EST. Interested persons should contact Phaedra Wells at pwells@eliassen.com for assistance. It is unlawful in Massachusetts and Maryland to require or administer a lie detector test as a condition of employment or continued employment. An employer who violates this law shall be subject to criminal penalties and civil liability.
Applicants with disabilities that believe they require an accommodation or assistance with a position, please email our HR team at hradmin@eliassen.com. This email inbox is designed exclusively to assist job seekers whose disability prevents them from being able to apply online. Emails sent for other purposes will not receive a response.
Please be advised that a number of fraudulent job postings have been released under the Eliassen Group brand.
Unfortunately, fraudulent job postings can happen. If anyone reaches out to you about an open position connected with Eliassen Group, never provide personal or financial information to anyone who is not clearly associated with Eliassen Group
If anyone seemingly from Eliassen Group has ever requested this personal information in the past or does so in the future, please contact fraud@eliassen.com.
Please ensure that you are working directly with us by confirming the following:
- When you work with Eliassen Group, all email communication will come from an Eliassen.com address, never Gmail, Yahoo, etc.
- Eliassen Group will never ask you for personal information (home address, bank account, or check routing number) until you have worked with someone clearly associated with Eliassen Group, as indicated above