Senior Full-Stack Engineer: AI

Ultralytics is seeking a Senior Full Stack Engineer to design, develop, and scale the Ultralytics Platform, our end-to-end AI model development environment.You will build robust backend services with Python/FastAPI, craft responsive frontend with TypeScript and Nuxt.js, and manage cloud infrastructure on GCP with Docker, while driving CI/CD via GitHub...

Santander is seeking a Senior Full Stack Engineer based in Madrid to design and operate secure, scalable applications and APIs for the Knowledge Base Platform, collaborating with AI, Data, Cloud, DevOps, Product, and Security teams.You will work on production-grade capabilities for RAG, GraphRAG, semantic search, and AI agents, using FastAPI, React, Python,...

IFS is seeking a Senior Full Stack Engineer to help shape and deliver a cloud-based AI carbon intelligence platform. You will lead both front-end and back-end work, influence architectural decisions, and drive high-quality software in a dynamic, diverse environment. You will collaborate across Product, AI, Platform Engineering, and other teams, champion Dev...

Luxoft in Spain is seeking an experienced Software Developer to modernize a mission-critical PMS used by investment professionals. The role involves transforming a mature WPF-based desktop platform into a scalable, API-enabled ecosystem across desktop, web, and data layers.You will upgrade. NET, WPF, and Dev Express apps, reduce technical debt, and optimize...

Lexroom is seeking a senior software engineer to join a small, autonomous squad of four to five. You’ll own technical decisions for what the squad ships, and take production ownership while helping teammates grow.Work across the stack with Next.Js, TypeScript, Python, Django, and AI tooling. We hire for judgment and curiosity, tailoring interviews to...

5 Blue Software is seeking a Senior Full-Stack Developer to join an international team building an AI-powered B2 B platform. You will own features end-to-end, from design to production, across frontend and backend, while applying an AI-first approach.You’ll collaborate with engineering and product teams across time zones, use Claude Code or similar tools,...

EPAM Systems is seeking a Senior Full Stack Engineer to join our team in Madrid, specializing in financial services technology. This on-site role focuses on designing, building, and maintaining robust, scalable applications using Java and React, while collaborating with cross-functional teams.The ideal candidate will have a strong background in both backend...

Tec Alliance in Barcelona, Spain, is hiring a Software Developer for a full-time role. You will join an international team delivering secure, scalable software powering licensing and provisioning features across our Bee Hive products. Bring 5+ years of hands-on software development experience, strong AWS knowledge (App Sync, CDK, Lambda, Dynamo DB, S3,...

Brayton Global is seeking a Senior Full-stack Engineer to develop and maintain enterprise apps, modernise legacy systems, and integrate AI tools into development workflows. Responsibilities include designing full-stack solutions, leveraging AI assistants, and ensuring secure, scalable deployments across MCP-enabled platforms. Strong knowledge of Java/Spring...