Senior Full-Stack Engineer: AI-Augmented Web Platform

Frontiers is seeking a Senior Full-Stack Engineer with a backend lean to join the RTM team, building a distributed .NET system with Vue/Nuxt frontends and SQL Server data operations. You’ll own end-to-end features, from design to production monitoring, in a hybrid Madrid-based role.

You’ll lead complex backend systems, modernise legacy apps, and leverage AI tooling to improve code quality, testing, and automation while collaborating across product, engineering, and cross-functional teams.