Senior Backend Engineer (Python / Data) – Spain, Remote – Up to €65,000Build data and ML powered backend systems for a major global airline.Flexible remote across Spain. Able to travel to the client's London office once a month for two to three days.ResponsibilitiesDesign, build and maintain scalable, secure server-side systems.Build backend services and ML model serving for a major global airline.Integrate ML models into backend systems and build API endpoints for model interaction.Develop scalable microservices using REST, gRPC or GraphQL.Optimise database queries and schemas for performance and reliability.Write unit and integration tests and maintain clear technical documentation.Monitor and optimise performance using observability tooling.Qualifications8 plus years in backend development, with a strong focus on scalable, high performance systems.Python expertise, building backend services and APIs with FastAPI, Flask or similar.In depth SQL (PostgreSQL, MySQL) and NoSQL (MongoDB)



knowledge.Extensive AWS experience, including database hosting, API management and serverless.Docker and container orchestration such as ECS.Git, GitHub Actions and CI/CD pipelines, plus performance tuning and scalability techniques.Right to work in Spain as a full-time employee;

no sponsorship available.Experience with message brokers such as Kafka or AWS SQS.Infrastructure as code with Terraform or CloudFormation.Observability tooling such as CloudWatch or Datadog.Serverless and event-driven paradigms, e.G., AWS Lambda.Agile and Scrum ways of working.AWS certifications (preferred).BenefitsThe chance to build for a major general airline inside a consultancy in triple digit growth.Versatile remote across Spain. Modern data and ML focused stack with genuine ownership.#J-18808-Ljbffr

📌 Contract Python Developer (Ceuta) - Up To €65.000 A Year (Madrid)
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📍 Madrid