Senior ML/AI Engineer

at WIZELINE

Barcelona - Spain

We are:
Wizeline, a global AI-native technology solutions provider, develops cutting-edge, AI-powered digital products and platforms. We partner with clients to leverage data and AI, accelerating market entry and driving business transformation. As a global community of innovators, we foster a culture of growth, collaboration, and impact.

With the right people and the right ideas, there’s no limit to what we can achieve

Are you a fit?
Sounds awesome, right? Now, let’s make sure you’re a good fit for the role:

Must-have Skills:

Strong fundamentals in Software Engineering, with the ability to build secure, scalable, production-grade systems.
4+ years of experience in Machine Learning Engineering or Data Engineering roles.
Strong programming skills in Python (or another ML-focused high-level language).
Experience designing and deploying Large Language Model (LLM)–powered applications in production environments.
Hands-on experience architecting multi-agent systems, including tool-calling and long-term memory strategies to solve complex, non-linear problems.
Experience implementing automated evaluation pipelines (e.g., LLM-as-a-judge).
Familiarity with optimized vector storage and indexing systems for NLP applications.
Experience building and maintaining high-volume data processing pipelines (structured and unstructured data).
Familiarity with cloud infrastructure (AWS and/or GCP), Docker, and Git.
Experience integrating internal and third-party AI APIs in a reliable and secure manner.
Hands-on experience with the LangChain ecosystem (e.g., LangGraph, LangSmith) for prompt management, evaluation, and agent orchestration.
Strong collaboration skills to work cross-functionally with data scientists, ML engineers, and product teams.
Clear and effective communication skills.
Bachelor’s or Master’s degree in Computer Science, Engineering, Data Science, or related STEM field (or equivalent practical experience).

What we offer:

A High-Impact Environment
Commitment to Professional Development
Flexible and Collaborative Culture
Global Opportunities
Vibrant Community
Total Rewards

*Specific benefits are determined by the employment type and location.

Find out more about our culture here.