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Senior Mainframe Programmer Jobs in Missouri (NOW HIRING)

Walmart

Senior, Software Engineer

Anderson, MO · On-site

$90K - $180K/yr

Our Mainframe Team is a high-performing, highly collaborative group responsible for supporting some of the most critical business processes across Walmart's store ecosystem. The team provides ...

Walmart

Senior, Software Engineer

Noel, MO · On-site

$90K - $180K/yr

Our Mainframe Team is a high-performing, highly collaborative group responsible for supporting some of the most critical business processes across Walmart's store ecosystem. The team provides ...

Walmart

Senior, Software Engineer

Cassville, MO · On-site

$90K - $180K/yr

Our Mainframe Team is a high-performing, highly collaborative group responsible for supporting some of the most critical business processes across Walmart's store ecosystem. The team provides ...

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Senior Mainframe Programmer information

What is the difference between Senior Mainframe Programmer vs Mainframe Developer?

AspectSenior Mainframe ProgrammerMainframe Developer
CredentialsTypically requires a mainframe programming certification and several years of experienceOften requires similar certifications and experience, focusing on coding and development
Work EnvironmentWorks primarily on legacy mainframe systems within financial, insurance, or government sectorsDevelops and maintains mainframe applications, often in similar industries
Employer & Industry UsageCommonly employed by large corporations with mainframe infrastructureUsed interchangeably with mainframe programmer, focusing on application development

The main difference between a Senior Mainframe Programmer and a Mainframe Developer is primarily experience level and scope. Senior Mainframe Programmers often have more responsibilities, including overseeing projects and mentoring junior staff, while Mainframe Developers focus on coding and application creation. Both roles require similar credentials and are vital in industries relying on legacy mainframe systems.

What are the most commonly searched types of Mainframe Programmer jobs in Missouri? The most popular types of Mainframe Programmer jobs in Missouri are:
What are popular job titles related to Senior Mainframe Programmer jobs in Missouri? For Senior Mainframe Programmer jobs in Missouri, the most frequently searched job titles are:
What job categories do people searching Senior Mainframe Programmer jobs in Missouri look for? The top searched job categories for Senior Mainframe Programmer jobs in Missouri are:
Senior Mainframe Programmer jobs near you
Infographic showing various Senior Mainframe Programmer job openings in Missouri as of July 2026, with employment types broken down into 1% Locum Tenens, 88% Full Time, 2% Part Time, 8% Contract, and 1% Summer. Highlights an 82% Physical, 5% Hybrid, and 13% Remote job distribution.

Sr. Java with Cobal/Mainframe experience(St. Louis City in Missouri) Hybrid and Day 1 Onsite

TestingXperts Inc. DBA Damcosoft

Saint Louis, MO • On-site

$47.75 - $61.25/hr

Contractor

Re-posted 2 days ago

Job description

Position Title

Sr. Java Engineer with Cobol/Mainframe

Domain EXP

(Banking Domain)

Location

St. Louis, MO (3 days hybrid at Client office)

Duration

6 Months

Must Have   

Java with COBOL and Mainframe requirement.

Job Description

The File Transfer Services team is looking for a Lead Software Engineer to drive our customer connectivity strategy forward by consistently innovating and problem-solving. The ideal candidate is passionate about the customer experience, highly motivated, intellectually curious, analytical, and possesses an entrepreneurial mindset.

In this key position, you will:

  • Design and develop high-performing Java and running on Linux. Ability to work on COBOL and mainframe (z/OS)  technologies is a plus.
  • Ensure scalability, security, and reliability of applications on Linux-based and mainframe-based infrastructures.
  • Translate complex technical solutions into business impacts for non-technical audiences.
  • Lead mainframe modernization efforts, bridging legacy COBOL, JCL, DB2 systems with Linux and Java applications.
  • Guide development teams in Agile best practices, ensuring consistent delivery and continuous improvement.
  • Provide technical leadership in software development, system architecture, and best coding practices.
  • Conduct design reviews, code reviews, and uphold coding standards.
  • Mentor and coach engineering teams, fostering a culture of technical excellence.
  • Collaborate with stakeholders to understand business requirements and translate them into technical solutions.
  • Present technical strategies, incident reports, and status updates to executive leadership and senior stakeholders.
  • Work closely with DevOps to automate deployments, and with BizOps to troubleshoot and resolve application, performance, and reliability issues.
  • Function as Scrum Master, facilitating daily stand-ups, sprint planning, retrospectives, and backlog grooming.
  • Stay up to date with emerging technologies.

The ideal candidate for this position should possess:

  • 8+ years of software development experience in Java/Linux with strong shell scripting and Linux command line skills. Experience working on Mainframe technologies is  a plus.
  • 3+ years of experience with file transfer applications like Connect Direct, and file transfer protocols like SFTP, FTPS, etc..
  • 3+ years of experience writing, optimizing, and automating tasks using Linux shell scripting.
  • Hands-on experience with IBM mainframe technologies, including COBOL, JCL, DB2, VSAM, CICS, and z/OS.
  • Expert in SQL queries and relational databases (DB2, Oracle, PostgreSQL)
  • Familiar with secure coding standards (e.g., OWASP, CWE, SEI CERT) and vulnerability management.
  • Awareness of security standards and RFC’s such as X.509 Certificates, SSH Keys, PGP encryption.
  • Has skills to orchestrate release workflows and pipelines and apply standardized pipelines via APIs to achieve CI and CD objectives using industry standard tools (e.g., Jenkins, XL Release, others).
  • Understands how to build robust tests to minimize defect leakage by performing regression, performance, deployment verification, and release testing.
  • Experience working as technical lead and/or Scrum Master.
  • Good knowledge of Scaled Agile Framework (SAFe).