Principal Engineer

About us Moneyhub empowers leading financial services organisations to understand their clients’ needs better. We provide the data services and embedded technologies required to deliver highly personalised, lifelong financial relationships. We are a data and payments company building ISO 27001-certified software for Open Banking, Open Finance, and Open Data. Our FCA-regulated platform lets organisations turn financial data into personalised digital experiences and initiate payments and hundreds of organisations across finance, media and retail rely on it. The role We are seeking an experienced engineer who has built things people actually use and still wants to write the code. You will have taken products from nothing to real users, more than once and seen what happens to them afterwards. We will ask what you shipped, who used it and what you did yourself. We mean end users, not just other engineers. Scale and performance matter here - clients notice when things are slow. You know how to find the bottleneck rather than guess at it. You are comfortable reading a flame chart and you will follow a problem down as far as it goes, whether that is a React component re-rendering because of a misused useEffect or cache locality in the hot path of an algorithm. You will have seen approaches fail in different companies and codebases and you know why. People will want your view before they start something and you will have influenced what a team builds without being their manager. You a