BigChange is at an inflection point. As a pioneer of AI‑powered field service software now serving over 250,000 users worldwide, we’re not done making big change. We’ve just launched BigChange Lightning — an AI intelligence layer that deploys autonomous agents across field service operations — and we need a Senior Director of Engineering to lead the teams building what comes next. Headquartered in Leeds and part of the global Simpro Group — one of the largest field service software networks in the world — BigChange has been transforming how trades and field service businesses operate since 2013. Our platform connects jobs, people, and performance across plumbing, HVAC, fire & security, facilities management, electrical contracting, and more. Trusted by over 2,200 high‑growth businesses, we’ve processed billions in invoiced work and scheduled tens of millions of jobs. We’ve featured multiple times on the Sunday Times Tech Track 100, and we’re just getting sta...