Ai-First Senior Full-Stack Engineer – End-To-End Web

Pillar is building a financial operating system for construction, combining AI, automation and modern software. We are seeking a product-minded Full Stack Engineer with backend depth to own features end to end, primarily focusing on backend while maintaining full product ownership. Location options include Milan or Barcelona, with a strong emphasis on...

Tecdata busca un Full Stack Software Engineer 100% remoto para diseñar y desarrollar aplicaciones complejas en entornos de alta velocidad. La posición requiere experiencia en desarrollo end-to-end y herramientas de IA, como Cursor o Claude Code, para acelerar el proceso de construcción. El candidato ideal debe tener más de 5 años de experiencia, ser...

Leadtech seeks a Senior Full Stack Product Engineer to own end-to-end features for our top web products. You will shape features with the Product team, translate business goals into technical decisions, and uphold high standards for quality and performance. Expect to work across frontend and backend using React, Next.js, Node.js, TypeScript, and JavaScript,...

Avenue Code in Spain is seeking senior professionals with a generalist profile, strong backend with Node.js, and solid React frontend experience to own product initiatives end-to-end. You will develop features independently, contribute to architecture, and collaborate in a small, autonomous squad within a SaaS context, balancing speed, quality and...

Indeep AI is seeking a versatile Full-Stack AI Engineer for our Barcelona office. You will work across the entire stack—from backend services and AI pipelines to the frontend and deployment infrastructure—supporting the CTO in delivering a coherent, reliable product. This hands-on role fits a generalist who thrives in a fast-paced startup. You’ll own...

Ashby is looking for an ambitious full‑stack engineer to solve customer problems and build long‑term features. You will own major parts of the product, drive projects, and deliver high‑quality software. Responsibilities include researching, wireframing, and implementing features, as well as collaborating with teams to translate requirements. Benefits...

Avance Consulting is seeking a Full Stack Software Engineer in Spain to build scalable products with Go on the backend and React on the frontend. You will own features end-to-end from design to testing and delivery, collaborating closely with Product and Design teams. The role is hands-on, contributing to architecture decisions, and maintaining code quality...

Pluxee España SAU in Madrid is seeking a Senior Product Engineer who will own features end-to-end—from backend services to the UI—and contribute to AI-assisted workflows that accelerate development. You will work across core domains (Benefits, Payments, Leaders, Managers App) to design resilient, scalable systems, champion testing, observability, and...

Enginy AI is seeking a seasoned Fullstack Engineer to own features from concept to production, spanning backend workflows to rich frontend UIs. You will shape systems and standards as the company scales, contributing across the stack and collaborating with Product and Design. You’ll work in Barcelona on a fast-moving AI-native GTM platform for B2B teams,...