**It's fun to work in a company where people truly BELIEVE in what they're doing!** **Job Description Summary:** The Software Engineer-III designs, develops, troubleshoots, and debugs software programs for software enhancements and new products. Develops software tools including operating systems, compilers, routers, networks, utilities, databases, and Internet-related tools. Determines software’s compatibility with hardware and/or influences software's design in relation to hardware. **Job Overview:** The Software Engineer-III designs, develops, troubleshoots, and debugs software programs for software enhancements and new products. Develops software tools including operating systems, compilers, routers, networks, utilities, databases, and Internet-related tools. Determines software’s compatibility with hardware and/or influences software's design in relation to hardware. **Required Qualifications** + **10+ years of professional experience** in z/OS systems programming, security, or product engineering. + Strong proficiency in **IBM Assembler** and **REXX** . + Deep understanding of **z/OS internals** (APF, SVC, PC, cross-memory services, control blocks). + Demonstrated expertise in **system dump reading and analysis** . + Exposure to **RACF, ACF2, and Top Secret** —with working knowledge of security profiles, rules, and access controls. + Solid debugging and problem-solving skills in complex mainframe environments. + Ability to **work independently at a mid-senior level** , while collaborating closely with global, cross-functional teams. **Preferred Qualifications** + Experience with project management tools like Jira + Prior contribution to **security-focused mainframe tools or utilities** . + Excellent communication skills for working with **distributed engineering teams and enterprise customers** . + Job Family Group: Engineering + Job Family: Software & Quality Assurance Engineering + Job Profile Name:Software Engineer III + Employee Type: Individual Contributor + Job Level: P3 (Career) . Rocket Software Inc. is committed to creating a diverse environment and is proud to be an equal opportunity employer. All qualified applicants will receive consideration for employment without regard to race, color, religion, gender, gender identity or expression, sexual orientation, national origin, genetics, disability, age, or veteran status. Rocket Software Inc. is also committed to compliance with all fair employment practices regarding citizenship and immigration status. Rocket is committed to working with and providing reasonable accommodation to individuals with physical and mental disabilities. If you need special assistance or an accommodation while seeking employment, please call: 781-577-4321 or send an email to people@rocketsoftware.com. We will make a determination on your request for reasonable accommodation on a case-by-case basis. _If you like wild growth and working with happy, enthusiastic over-achievers, you'll enjoy your career with us!_ Companies around the world trust Rocket to solve their most complex business challenges by powering their critical infrastructure, business processes, and data. We help extend the value of these assets, enabling our customers to embrace the potential of cloud and mobile computing, advanced analytics, and the innovations of tomorrow. From the clothes we wear to the cars we drive, Rocket solutions power the back-end systems that thousands of brands rely on every day. At Rocket, software is about more than just code—it’s about people. We are passionate problem-solvers, working to make a difference for others. Our foundation is built on empathy, humanity, trust, and love, and we strive to embody these core values in everything we do. Whether we’re serving our customers, partners, or fellow Rocketeers, we are committed to treating everyone with the respect and care they deserve. Founded in 1990, Rocket Software is headquartered in Waltham, Massachusetts, and has 20 offices worldwide, bringing people and technology together to build a better future.