Senior Backend Engineer – Python & AI
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About the role
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.
What you’ll do
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
Design resilient
distributed systems
with appropriate
failure handling ,
retries ,
fallbacks ,
rate limits , and
asynchronous processing
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 m

📌 Senior Python Backend Engineer (Barcelona)
🏢 Capitole
📍 Barcelona