Staff Software Engineer (Mainframe)

Staff Software Engineer (Mainframe) Req #650 Fenton, MO, USA Apply Share Job Description Posted Tuesday, May 12, 2026 at 3:00 AM •This position is fully remote. In order to qualify for this role with UniGroup, you must live in one of the following states: Missouri, Illinois, Arkansas, Georgia, Tennessee, North Carolina, Texas, Florida, or Indiana. Preference will be given to local candidates.•Position Overview The Staff Software Engineer (Mainframe) plays a critical role in designing, developing, and supporting UniGroup's core business applications running in a mainframe environment. This position combines deep technical expertise with hands-on leadership/mentorship, guiding engineers through complex legacy systems while supporting long-term modernization initiatives. This is an ideal role for a senior engineer who enjoys solving challenging problems in established systems, mentoring others, and influencing technical direction across mission critical applications. What You'll Do Technical Leadership & Mentorship Provide day-to-day technical leadership/mentorship to a team of mainframe engineers, ensuring high-quality delivery and adherence to engineering best practices Mentor junior and mid-level engineers through code reviews, pair programming, and structured knowledge transfer sessions Serve as a subject matter expert for COBOL, DB2, JCL, TSO, and core business processes Lead small workstreams or technical initiatives, ensuring clear requirements, strong documentation, and alignment with architectural standards Guide the team through complex debugging, performance tuning, and production support scenarios Core Engineering Responsibilities Design, develop, test, and support software applications within a mainframe environment Write, maintain, and debug COBOL programs supporting order processing, billing, and transportation systems Support CI/CS environments and applications using DB2 as the primary database Utilize JCL and TSO to manage batch processing, job execution, and system operations Use mainframe utilities such as QMF and SCLM to support development, testing, and source control Partner with modernization teams to validate and support work related to mainframe transformation efforts Troubleshoot and resolve production issues, ensuring system stability and minimal business disruption Participate in code reviews and testing efforts to ensure accuracy, performance, and reliability Maintain technical documentation and contribute to team knowledge repositories Collaborate with analysts, product partners, and business stakeholders to translate requirements into technical solutions What You'll Bring Required Qualifications Bachelor's degree in Computer Science, Information Systems, or equivalent professional experience 8+ years of experience in software development or application support within a mainframe environment Hands-on experience with

COBOL , DB2 , JCL

, and TSO Demonstrated ability to troubleshoot, test, and validate changes in legacy systems Experience supporting production systems in a CI/CS environment Strong communication skills with the ability to guide, influence, and mentor engineers Proven ability to lead technical efforts and contribute to team planning and execution Preferred Qualifications Experience participating in or supporting mainframe modernization or migration initiatives Familiarity with mainframe utilities such as QMF and SCLM Prior experience in a lead, senior, or mentorship-focused engineering role Exposure to distributed systems, cloud platforms, or integration patterns supporting modernization Why Work at UniGroup At UniGroup, we build technology that supports iconic brands like United Van Lines and Mayflower Transit, while investing in the people who power our platforms. Our engineering teams work on meaningful, enterprise-scale systems that support a nationwide network of agents, customers, and internal partners. We offer Competitive compensation and a comprehensive benefits package Medical, dental, and vision insurance with multiple plan options 401(k) retirement plan with company match Paid time off, company holidays, and paid parental leave Hybrid work environment that supports flexibility and work-life balance Opportunities to work with modern technologies while contributing to legacy modernization A collaborative, people-first culture that values mentorship, continuous learning, and thoughtful innovation Work Authorization Candidates must be legally authorized to work in the United States on a permanent basis UniGroup is unable to provide visa sponsorship or employment authorization support now or in the future We foster diversity, in part, by imposing a strict policy of non-discrimination. Employment decisions are made without regard to race, color, ethnicity, national origin, sex, sexual orientation, gender identity, age, religion, disability, veteran or military status, genetic information or other status protected by the law. We value the unique skills and experiences that veterans and separated service members bring to our workforce. While serving our country you have gained skills such as leadership, flexibility, and agility, which will help to make you successful here. We are dedicated to supporting military families and ensuring that we provide a welcoming environment for our country's heroes. We hope you consider joining the UniGroup family. UniGroup is committed to the full inclusion of all qualified individuals. As part of this commitment, UniGroup will ensure that persons with disabilities are provided reasonable accommodations. If reasonable accommodation is needed to participate in the job application or interview process, to perform essential job functions, and/or to receive other benefits and privileges of employment, please contact careers@unigroup.com Job Details Job Family Technology Job Function Individual Contributor Pay Type Salary Scan this QR code and apply! Download Fenton, MO, USA