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Mainframe Developer
Mainframe DeveloperTekskills Inc. • Tampa, FL, United States
Mainframe Developer

Mainframe Developer

Tekskills Inc. • Tampa, FL, United States
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  • [job_card.full_time]
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Job Title : Mainframe Developer

Location : Tampa FL (Hybrid)

Duration : 12+ months

Job Description

  • Mainframe Application Developer / Solution Architect (L3 Support – Tech lead) Need a highly experienced mainframe developer or solution architect with experience leading a team providing Tier 3 support that includes code enhancements, bug fixes, remediation of vulnerabilities, and platform upgrades (z / OS, DB2, IMS, SAS, and Endevor-related tasks).
  • The developer should be able to support Tier 1 and Tier 2 teams who manage daily operations and ensure the system remains stable, available, and functioning 24 / 7.
  • This role supports multiple integrated network planning and work administration systems used to plan, provision, dispatch, inventory, and maintain telecom networks. Knowledge of PL / I or Assembler, JCL, REXX, SAS, DB2, IMS, and mainframe compilation flows is required.

Responsibilities

Provide Tier 3 Support for all mainframe OSS applications, including :

  • Provide code fixes across PL / I, Assembler, COBOL, SAS, REXX, CLIST, and JCL modules
  • Prepare enhancements and minor functional changes
  • Identify and remediate vulnerabilities in mainframe modules or JCL flows
  • Perform analysis of production issues impacting dispatch, inventory, or planning systems
  • Thoroughly test all software changes using approved test suites
  • Successfully build and deploy all software changes through Endevor across multiple regions
  • Debug and resolve abends using Abend-Aid, Fault Analyzer, or system dumps
  • Support DB2 and IMS precompile, bind, and ACBGEN flows as required for code changes

    • Assist the Tier 2 Support team as needed including :

  • Analyzing and responding to end-user or Tier 1 / Tier 2 developer questions and tickets
  • Administering user access to specific batch flows or applications (as necessary)
  • Providing routine system and job stream maintenance
  • Maintaining system interfaces between different subsystems
  • Ensuring that nightly and weekly cycles complete successfully
  • Remediating system overload issues, long-running jobs, or SQL degradation

    • Requirements

  • Minimum 10-15 years of hands-on experience supporting applications on IBM z / OS and leading a team of developers
  • Minimum 5–7 years of experience in PL / I or COBOL development
  • Strong experience with JCL, PROCs, REXX, CLIST, ISPF, and SDSF
  • Solid understanding of DB2 static SQL, precompile, bind, package / plan management
  • Experience with IMS (DB + DC), including PSB / DBD / ACB generation flows
  • Prior experience with Endevor or similar mainframe source / version management tools
  • Ability to analyze load modules, compare source-to-load behavior, and reverse-engineer logic when source is unavailable

    • Nice to Have

  • Experience with telecom OSS / Telecom systems
  • Experience with SAS on z / OS (report generation, batch execution)
  • Experience with dump reading tools (Abend-Aid, Fault Analyzer)
  • Experience in a high-availability, 24 / 7 operational environment
  • Experience integrating applications across IMS, DB2, and distributed platforms
  • Familiarity with NDM / Connect : Direct, MQ, SFTP on mainframe
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