Senior Backend Engineer – Python & AI

We are looking for a Senior Backend Engineer to join an AI Engineering team within a large international technology environment.
In this role, you will design, build, and operate robust Python backend services that power AI-enabled applications and reusable engineering capabilities across a complex enterprise ecosystem .
This is a highly hands-on senior individual contributor position, focused on solving real production challenges , making sound architectural decisions , and turning AI and data-science capabilities into secure, reliable, scalable, and maintainable software.
You will take ownership of backend services from initial design through production operation , working closely with Data Scientists, Product Managers, Platform Engineers, Security Specialists, and Architects .
If you enjoy building production-grade Python services , designing APIs and distributed systems , working with AWS , and integrating AI/LLM capabilities into real-world applications, this could be a great fit.

Design, build,



and maintain scalable backend services and APIs using Python
Own backend services end-to-end, from architecture and implementation through deployment and production operation
Integrate AI models , Large Language Models (LLMs) , and Machine Learning services into production systems
Define service boundaries , data models , persistence strategies , and integration contracts
Work with relational databases , data modelling , schema evolution , and persistence strategies
Deploy and operate backend services in AWS cloud environments
Design services with reliability , security , observability , performance , and cost in mind
Handle production AI concerns such as latency , structured outputs , sensitive data , model failures , and external API limitations
Improve automated testing , CI/CD pipelines , monitoring , dashboards , logging , and alerting
Work with Docker and Kubernetes to containerise and operate backend workloads
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📌 Remote Senior Python Backend Developer (Cataluña)
🏢 Capitole
📍 Cataluña