Senior Software Engineer in Test

Rocket Software is seeking an experienced Senior Software Test Engineer to join our mainframe analytics and performance product teams. In this role, you will be a proactive champion for product quality-shaping test strategy, extending our automated test capabilities, influencing product direction, and helping define an excellent user experience.

You’ll work on technically deep products operating in complex IBM mainframe environments. Experience with z/OS, IMS or CICS, scripting languages, and test automation frameworks will provide a strong foundation. We also welcome candidates with backgrounds in mainframe systems programming, application development, or production support who are motivated to grow in a specialised and challenging testing domain.

High-quality testing leads to high-quality products. If you’re passionate about software quality and enjoy working closely with highly skilled engineers, we’d love to hear from you.

As a Senior Software Test Engineer, you will be a key contributor within our mainframe analytics and performance development teams. You will quickly develop a deep understanding of complex system behaviour and take clear ownership of product quality. You’ll help mentor junior team members, challenge quality assumptions, and collaborate closely with development and product partners to deliver robust, performant, and reliable software.

Responsibilities

• Own product quality across the full lifecycle-from early design through release and ongoing supportability
• Architect, extend, and maintain scalable automated test frameworks for mainframe-based analytics and performance products
• Treat test automation as software engineering, applying sound design principles, reviews, and a focus on long-term maintainability
• Partner closely with developers and product owners to improve testability, usability, and system resilience
• Validate not only functional correctness, but also performance, scalability, failure modes, user experience, and operational behaviour
• Apply deep system knowledge to influence product design decisions before defects are introduced
• Continuously evolve test strategy as system complexity and real-world customer usage grows

Do you have experience in Mainframe?, * Hands-on experience with IBM mainframe environments (z/OS)

• Experience designing, building, or extending automated test systems or frameworks (not just writing individual test cases)
• Proficiency in one or more scripting or programming languages commonly used for automation

Highly Desirable Skills and Experience

• Background in mainframe systems programming or application development
• Hands-on experience with IMS (applications, transactions, or system interactions)
• Exposure to performance, capacity, or analytics software
• Experience diagnosing production issues and feeding those learnings back into automated test coverage
• Curiosity, adaptability, and a willingness to learn deeply in a technically demanding domain

The successful applicant will bring strong technical judgement, an architectural mindset, attention to detail, and enthusiasm for working in a highly collaborative, technically deep engineering environment. You’ll also demonstrate a proactive approach to researching, evaluating, and applying new technologies, processes, and practices to continuously improve product quality.