UST is seeking a Senior Frontend Developer in Madrid to build modern, scalable web apps for a general wealth management client. You will collaborate in cross-functional teams with a DevOps mindset, delivering high-quality UI code in React, JavaScript and TypeScript. The role requires strong React and TypeScript skills, exposure to CI/CD practices, and an English-proficient communicator. The position is hybrid with three days onsite in Madrid’s Sol area and attractive benefits.