Senior Backend Engineer (Python / Data) | Spain, Remote | Up to €65,000Build data and ML powered backend systems for a major general airline. Versatile remote across Spain.OverviewWe are hiring a Senior Backend Engineer to design, build and maintain scalable, secure server‑side systems for a major global airline. This is a data and ML‑leaning backend role. You will build robust microservices and APIs, host and serve AI and ML models in production, integrate them into backend systems, and expose them through clean, performant endpoints. A strong focus on separation of concerns, security and performance is central to the role.ResponsibilitiesIntegrating models into backend systems and building API endpoints for model interaction.Developing scalable microservices using REST,



gRPC or GraphQL.Optimising database queries and schemas for performance and reliability.Writing unit and integration tests and maintaining clear technical documentation.Monitoring and optimising performance using observability tooling.Employing Kafka or AWS SQS message brokers.Infrastructure as code with Terraform or CloudFormation.Qualifications8+ 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.Serverless and event‑driven paradigms (e.G., AWS Lambda).Agile and Scrum ways of working.AWS certifications (preferred).BenefitsAbility to travel to the client's London office once a month for two to three days.Flexible remote across Spain.A modern data and ML‑focused stack with genuine ownership.The chance to build for a major global airline inside a consultancy in triple‑digit growth.#J-18808-Ljbffr

📌 Python Engineer (País Vasco) - Up To €65.000 A Year - Remote (Madrid)
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📍 Madrid