Senior Backend Engineer – Python & AI

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 mind
Handle production

AI concerns

such as

latency

,

s

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