Senior Python Backend Engineer: Knowledge Graphs & AI

ERNI; Barcelona; Hybrid; EUR 60,000 - 90,000; Full time

Benefits offered by this job

Certifications covered up to €1,500

Private health insurance

Sick leave coverage

Emotional, legal, and family support

Gym discounts

Flexible remuneration

Referral bonuses

23 vacation days

Language courses

Job summary

ERNI Barcelona is seeking a senior backend software engineer to design, develop, and maintain a Python-based MCP backend that connects Knowledge Graphs with AI agents and cloud data platforms. You will optimize SPARQL queries and API performance, extend semantic model compilation capabilities, and ensure security, scalability, and reliable testing in a cloud-native setup.

The role offers a hybrid work model in Barcelona with a focus on autonomous contribution, mentoring, and knowledge sharing

Qualifications

• 5+ years of professional software engineering experience.
• Backend services and APIs in production environments.
• Strong hands-on Python 3, FastAPI and REST APIs.
• Experience with RDF and SPARQL and cloud-native environments.

Responsibilities

• Design, develop and maintain a Python-based MCP backend connecting Knowledge Graphs with AI agents and cloud data platforms.
• Optimize SPARQL queries and API performance.
• Extend semantic model compilation capabilities and ensure security, scalability, and automated testing.

Skills

Python 3

FastAPI

Pydantic

REST APIs

RDF

SPARQL

Docker/Podman

Kubernetes/OpenShift

CI/CD

Git

OAuth 2.0/OIDC

RBAC

Caching

Observability

Linux

Terraform

Jenkins

English

Tools

Docker/Podman

Kubernetes/OpenShift

Jenkins

Terraform

Git

Job description

ERNI Barcelona is seeking a senior backend software engineer to design, develop, and maintain a Python-based MCP backend that connects Knowledge Graphs with AI agents and cloud data platforms. You will optimize SPARQL queries and API performance, extend semantic model compilation capabilities, and ensure security, scalability, and reliable testing in a cloud-native setup.

The role offers a hybrid work model in Barcelona with a focus on autonomous contribution, mentoring, and knowledge sharing