> Markdown version of [/jobs/ext/2042637-w2-position-mainframe-assembler-developer-tx-nc](https://www.wearedevelopers.com/jobs/ext/2042637-w2-position-mainframe-assembler-developer-tx-nc). Every page supports `.md` or `Accept: text/markdown`. Links point to the HTML versions so they work for humans too. Agent guide: [/agents.md](https://www.wearedevelopers.com/agents.md). --- # W2 Position - Mainframe Assembler Developer - TX & NC - **Company:** Octans Group Llc - **Location:** Addison, TX, United States - **Experience:** Expert - **Salary:** $135,200.0 - **Contract:** Permanent contract - **Skills:** Batch Processing, IBM Parallel Sysplex, Job Control Language (JCL), IBM Mainframe, Mainframes, Software Engineering, Virtual Storage Access Methods, Z/OS, Tso/ispf - **Published:** August 13, 2026 - **Apply:** https://www.careerjet.com/jobad/us9e3aa4fd47943f11b551548ab95450d9 ## About the Role Note: Experience in financial services and parallel sysplex environments is preferred., Seeking a Mainframe Assembler Developer with 5+ years of experience in IBM Mainframe application development and production support. Must have strong hands-on expertise in HLASM, JCL, TSO/ISPF, CA7, VSAM, GDGs, Connect:Direct (NDM), ISPW/change management tools, and batch processing systems. ## Description Analyze, maintain, and enhance high-volume batch applications Provide production support for IBM Mainframe systems Troubleshoot JCL and batch failures Resolve critical production issues in legacy assembler environments Support incident management and SLA-driven operations, Introduction We are seeking a highly experienced developer to support and enhance a mission-critical legacy application written in IBM z/OS assembler language. This role requires… + 11 days ago + ## Related Videos - [".Net is too slow" was not an option](https://www.wearedevelopers.com/videos/100176-net-is-too-slow-was-not-an-option) - [Cloud as the new mainframe: why the cloud hype does not reflect the dev reality](https://www.wearedevelopers.com/videos/797-cloud-as-the-new-mainframe-why-the-cloud-hype-does-not-reflect-the-dev-reality) - [Building with IBM Bob](https://www.wearedevelopers.com/videos/100275-building-with-ibm-bob) - [Migrating from COBOL with AI: A Moonshot Demo](https://www.wearedevelopers.com/videos/1531-migrating-from-cobol-with-ai-a-moonshot-demo) - [Grappling With Clunky Old Software? Start by Understanding What’s Inside!](https://www.wearedevelopers.com/videos/1189-grappling-with-clunky-old-software-start-by-understanding-what-s-inside) ## Related Articles - [93 Java Interview Questions You Should Prepare For](https://www.wearedevelopers.com/magazine/14-93-java-interview-questions-you-should-prepare-for) - [How We Built a Worry-Free System That Runs for 10+ Years – And What We’d Do Again](https://www.wearedevelopers.com/magazine/751-how-we-built-a-worry-free-system-that-runs-for-10-years-and-what-we-d-do-again) - [Highest Paying Tech Companies for Developers](https://www.wearedevelopers.com/magazine/220-highest-paying-tech-companies-for-developers) - [Why Attend a Developer Event in 2026?](https://www.wearedevelopers.com/magazine/688-why-attend-a-developer-event-in-2026) - [Is Software Engineering Over-Saturated?](https://www.wearedevelopers.com/magazine/418-is-software-engineering-over-saturated) - [Software Developer Salary in Switzerland [2023]](https://www.wearedevelopers.com/magazine/215-software-developer-salary-in-switzerland-2023)