About us:
Shalion is a data and insights-driven company that serves world-class manufacturers and brands globally. Through our Digital Shelf Optimization, Retail Media, and Food Service Aggregators solutions, we provide innovative tools for e-commerce monitoring.

At Shalion, we empower brands to make smarter business decisions in eCommerce by delivering actionable data and insights on online product prices, availability, share of search, and more. We operate across 1000+ e-retailers in 60+ countries, serving industry giants such as Heineken, Lego, Danone, Nestlé, and JDE.

The role:
As a Machine Learning Engineer, you will join our Data Science team and play a key role in transforming research-driven work into robust, production-ready systems. You will help elevate the team’s engineering maturity, promote best practices, and ensure that models are scalable, maintainable, and deliver real business impact.

Your Responsibilities:
- Own the end-to-end lifecycle of ML systems, with focus on deployment and monitoring
- Refactor and productionize existing models and notebooks into clean,



modular, and testable code.
- Introduce and enforce best practices in coding, testing, model versioning
- Set up and improve CI/CD workflows for ML systems
- Work closely with Data Scientists and Data Engineers to ensure clean interfaces and reliable data flows
- Act as a technical reference within the team, reviewing code and guiding less experienced members

Your profile:
- 3+ years of experience building and deploying ML systems in production environments
- Strong software engineering skills in Python, with a focus on writing clean, maintainable, and testable code
- Proven experience taking models from notebook to production
- Solid understanding of model development lifecycle
- (Bonus) Familiarity with containerization (Docker)
- (Bonus) Experience with cloud environments (AWS preferred) and data platforms such as Snowflake

Soft Skills:
- Pragmatic and solution-oriented: you focus o

📌 Machine Learning Engineer (Barcelona)
🏢 Shalion
📍 Barcelona