Empleos de backend python en Barcelona

About Stark Stark builds the world’s most powerful electric motorcycles. From the VARG MX to the road-legal VARG EX & SM, our bikes have won world championships and are engineered to outperform anything with a combustion engine. We’re based in Sant Boi, Barcelona, growing fast (77% year‑on‑year) and building a team that will take us even further....

Role Description You build the systems that actually make AI work in enterprise environments, not demos, not prototypes that stall after a pilot, but production agentic architectures running inside real client organizations. The difference between an AI Engineer and what we are looking for is straightforward: you have shipped a multi-agent system in...

Octopus Energy in Spain seeks a Senior Frontend Engineer to own frontend architecture for onboarding flows, private areas, and customer dashboards. You’ll collaborate with international teams to deliver high-impact frontend features across Europe.You’ll focus on TypeScript/React, Next.Js, GraphQL, and CSS-in-JS while keeping an eye on backend...

Octopus Energy is seeking a Senior Frontend Engineer in Barcelona or Valencia, Spain, to own frontend architecture for customer onboarding, private area, and billing features. You will collaborate with international teams across Europe, shaping fast-paced, customer-focused frontend solutions.You will work primarily on frontend, with opportunities to explore...

Octopus Energy is seeking a Senior Frontend Engineer in Barcelona or Valencia, Spain, to own frontend architecture for customer onboarding, private area, and billing features. You will collaborate with international teams across Europe, shaping fast-paced, customer-focused frontend solutions.You will work primarily on frontend, with opportunities to explore...

Paul Marlex busca dos Senior Data Platform Engineer (Java / Databases) para sus oficinas en Barcelona. Diseñarás y desarrollarás componentes backend de alta escalabilidad, trabajarás con bases de datos distribuidas y plataformas de datos complejas, y colaborarás en decisiones de arquitectura en entornos de alto rendimiento.Se valorará experiencia en...

Senior Fullstack Engineer in Madrid/Barcelona (remote) for an International clientJob role: Senior Fullstack Software EngineerJob description: A Senior Fullstack Software Engineer with high experience in DevOps, Kubernetes & Python.Location: Madrid/Barcelona (Remote)Languages required: English (C1) MANDATORYMinimum experience: 5 to 7 yearsRate:...

In this role you design and develop features for the full stack, spanning React UIs and Python FastAPI backends, to support core platform workflows. You will build RESTful APIs, collaborate with Data and Security Engineering, and ensure high code quality through testing and reviews. You participate in Agile cross-functional teams across Germany and Spain and...

In this role you design and develop features for the full stack, spanning React UIs and Python FastAPI backends, to support core platform workflows. You will build RESTful APIs, collaborate with Data and Security Engineering, and ensure high code quality through testing and reviews. You participate in Agile cross-functional teams across Germany and Spain and...

Merck is seeking a Senior Cloud Backend Engineer to shape cloud-native platforms for Healthcare R&D, primarily using AWS and Azure AD. You will implement new features, maintain platform functions, and manage deployments while collaborating with teams across the US, Europe, and India.The role emphasizes data-driven drug discovery at scale and requires strong...

Q-tech is seeking a seasoned software engineer to help build high‑quality products that improve lives, including pets. The role focuses on backend with Python, frontend with ReactJS/React Native, and strong UX and testing practices.You’ll work in a hybrid model (office Mondays and Thursdays) with a values‑driven team that mentors others and grows...

Cas Training en Barcelona busca un Cloud Engineer con más de 5 años de experiencia en infraestructura y operaciones en la nube (Azure y AWS). Será responsable de diseñar soluciones backend y APIs escalables, integrando IA generativa en entornos productivos y gestionando IaC con Terraform, Bicep o CloudFormation.El candidato ideal posee experiencia...

Experteer Overview As a Senior SW Engineering Lead you will drive the adoption of AI-DLC practices across engineering teams to accelerate productivity and software quality. You partner with architects, engineers, and business stakeholders to design and deliver scalable AI-enabled software solutions. You’ll shape engineering strategy, promote modern...

Cavendish Professionals is seeking a fully-remote Senior AI Engineer to design and develop AI-powered applications. The role involves building backend services using Python and FastAPI, integrating AI workflows, and optimizing performance of AI systems.Ideal candidates will have expertise in LLMs, relational databases, and frameworks like LangChain or...

Schwarz Gruppe in Barcelona, Catalunya, es, seeks a hands-on VEM Full Stack Engineer to craft features across the full stack (React UI + Python FastAPI backend). You will build RESTful APIs, collaborate with Data and Security Engineering, and contribute to QA and testing processes in an international, cross-functional team spanning Germany and...

Job Description:About the Team:Our Technology team drives the evolution of our Engineering, Data, Product and User Experience functions. With a keen focus on delivering cutting-edge solutions, we shape the digital landscape for our customers, readers and users. From revolutionizing visuals to optimizing tools and harnessing the power of data, mobile, video...

We Are Waiting for YouHi there! I am Álvaro, the recruiter for this position. Nice to meet you! First, a little bit about what I like the most about working at Zurich Technology Delivery Center: The environment here is incredibly collaborative and innovative. Our tech-driven mindset fosters continuous learning and growth, creating an atmosphere where...

Cas Training en Barcelona busca un Cloud Engineer con más de 5 años de experiencia en infraestructura y operaciones en la nube (Azure y AWS). Será responsable de diseñar soluciones backend y APIs escalables, integrando IA generativa en entornos productivos y gestionando IaC con Terraform, Bicep o CloudFormation.El candidato ideal posee experiencia...

Buscamos un/a Arquitecto/a de Software Senior para integrarse en el proyecto europeo EDF EYE. Tu misión será liderar el diseño técnico y la evolución de arquitecturas backend de alto rendimiento para sistemas de defensa de próxima generación. Trabajarás en un entorno de alta complejidad técnica, asegurando la escalabilidad, resiliencia y seguridad...

Buscamos un Senior AI Product Engineer para incorporarse a una iniciativa de innovación enfocada en construir y modernizar aplicaciones internas de negocio utilizando IA Generativa como acelerador. No se trata de un rol tradicional de desarrollo de software basado en recibir requisitos predefinidos. Trabajarás directamente con usuarios de negocio,...