Senior Software Engineer

REX SOFTWARE GROUP Senior Position Description AI Native Senior Software Engineer Reports to Head of Engineering (or relevant Tech Lead) Direct Reports None (informal technical mentoring across the product stream and wider engineering team) Location Australia-based (East coast preferred / Remote AU) Scope Product stream technical leadership, with cross-stream influence on AI-native standards and practices Domain AI-native software development, AI agent orchestration, and product delivery Role Overview Rex Software Group is transitioning to an AI-native operating model. This is not about adding AI features to a traditional development process, it is a fundamental shift in how we build and ship software. Our target is Level 4 AI maturity: humans define the architecture, usage scenarios, and acceptance criteria, while AI agents autonomously write, review, and fix code. The AI Native Senior Software Engineer is a senior engineering role for builders who already work this way and can set the standard for others to follow. You will be embedded within a product stream (Rex CRM or Rex PM) as its most experienced AI-native practitioner, expected to deliver production-quality software using AI coding agents as your primary development tool, and expected to shape how the rest of the stream, and over time the wider engineering organisation, works with AI agents. You are not writing every line of code by hand, you are orchestrating AI agents to do it, auditing their output, and ensuring t