Senior Ai-Powered Backend Engineer — Remote

Marfeel is looking for a Backend Engineer to join their team in Barcelona. You will design and maintain backend services, utilizing Node.js and various databases while ensuring high performance and scalability of applications. The ideal candidate will have over 5 years of experience with a solid understanding of API design and cloud deployments. Benefits...

Kleo is seeking a talented Senior Backend Engineer to develop and optimize our AI-native financing platform. You will contribute to the entire product lifecycle, building features using NestJS, TypeScript, and PostgreSQL, while integrating advanced AI solutions to enhance automated workflows. Join a dynamic startup environment in Madrid, where you will...

Shalion is seeking a Senior Backend Engineer to lead backend initiatives across multiple products and shape the technical roadmap. You will manage one backend engineer from day one and guide the team as it grows, balancing hands-on architecture with leadership responsibilities. The role emphasizes product-focused engineering, AI-enabled automation, and close...

Buscamos un Senior AI & Backend Engineer & Front Requisitos Técnicos Experiencia real y reciente construyendo o aplicando en producción sistemas de agentes/subagentes IA: orquestación de tareas, definición de skills, gestión de contexto, tool use/function calling. Dado que la disciplina es muy reciente, valoramos proyectos concretos y profundidad sobre...

Arsys in Alcobendas (Madrid area) is seeking a software engineer to build a hybrid Node.js–C++ system and transform architectural specs into production-ready code. You will develop backend components and optimize Node.js–C++ interactions in a fast-paced environment. You will leverage AI tools to accelerate development, apply test-driven practices, and...

Wizeline, a global AI-centric technology solutions provider, is seeking a frontend engineer in Barcelona to build scalable, accessible UI across products. You will collaborate with Product, Design and Backend teams to deliver high-quality user experiences using CSS-in-JS, Storybook and design systems. The role emphasizes code quality, frontend architecture,...

Preply Inc. is seeking a Staff Engineer in Barcelona to shape technical strategy and own architecture for scalable AI-enabled learning systems. You will drive cross-team initiatives with Engineering and Product leadership and raise the bar for engineering excellence. You’ll mentor senior engineers, influence technical decisions, and ensure performance,...

Vic.ai, Inc. is seeking a Senior Backend Engineer to join the team behind our AI-first iPaaS. You will build and operate the integration platform that connects customers' ERP and financial systems to Vic.ai, with data syncing at scale and AI-assisted onboarding. You will work on backend services in TypeScript/Node.js, Elixir/Phoenix, and Python, and...

Compañía consolidada del sector servicios, actualmente inmersa en un proceso de transformación digital, busca incorporar talento técnico para impulsar su estrategia de inteligencia artificial.El rolIncorporamos un/a Senior Backend AI Engineer para construir e integrar funcionalidades de IA en productos que ya están en producción y, cuando sea...