2 ruby English-speaking jobs in Pays de la Loire

Enhance the performance of key features implemented in Kotlin, React (TypeScript/Javascript) and Ruby ... Our stack is Javascript/Typescript and Ruby on Rails / Kotlin, but any experience with similar frameworks

changes mostly in TypeScript but with possible incursions outside of pure frontend (shell scripts, Ruby ... experience in Engineering; Are eager to be hands-on with our stack: we use React and TypeScript, with Ruby