Senior Software Engineer (z/OS and MFC)

Location: Chicago
Posted on: June 23, 2025

Job Description:

Modernize legacy mainframe and desktop applications used to support the backbone of the credit card transaction industry 100% remote! This Jobot Consulting Job is hosted by: Charles Simmons Are you a fit? Easy Apply now by clicking the "Apply Now" button and sending us your resume. Salary: $50 - $75 per hour A bit about us: This small, profitable SaaS organization has had a consistent corner of the credit card transaction infrastructure tooling industry for over 20 years, supported by a small and experienced team of engineers distributed across the US and UK. As technology continues to evolve, their desktop and mainframe applications continue to be necessary and to continue their successful support, new features and design paradigms are needed to replace the old. We're looking for a seasoned software engineer that has worked in modern design and implementation of legacy enterprise systems Why join us? 100% work from home full time, 40 hours a week, regular hours, competitive hourly pay comprehensive health, vision, and dental insurance plan Job Details The Senior Software Engineer will be responsible for designing and implementing new features and system designs to modernize an existing enterprise SaaS suite of tools used by network operations teams supporting credit card transaction processing servers. This requires an experienced hand at design, development, testing, debugging, and maintaining products built on Windows GUIs in MFC, z/OS, and TCP/IP. Must Have: 8 years of experience in C++, MFC z/OS Assembler or z/OS REXX TCP/IP protocol and multi-threading GUI unit testing Storage management strong, reliable high speed internet connection experience working with remote teams, collaborating via MS Teams Nice to Have: Ranorex Azure DevOps, CI/CD pipeline engineering GitHub Docker Interested in hearing more? Easy Apply now by clicking the "Apply Now" button. Jobot is an Equal Opportunity Employer. We provide an inclusive work environment that celebrates diversity and all qualified candidates receive consideration for employment without regard to race, color, religion, age, sex, national origin, disability status, genetics, protected veteran status, sexual orientation, gender identity or expression, or any other characteristic protected by federal, state or local laws. Sometimes Jobot is required to perform background checks with your authorization. Jobot will consider qualified candidates with criminal histories in a manner consistent with any applicable federal, state, or local law regarding criminal backgrounds, including but not limited to the Los Angeles Fair Chance Initiative for Hiring and the San Francisco Fair Chance Ordinance.

Keywords: , Buffalo Grove , Senior Software Engineer (z/OS and MFC), IT / Software / Systems , Chicago, Illinois