Senior ML/AI Engineer

Barcelona - Spain April 8, 2026 Full Time Greenhouse

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:

Key Responsibilities

  • Collaborate with data scientists and engineers to orchestrate LLMs and tools into complex AI workflows.
  • Implement optimized vector storage and indexing systems for NLP.
  • Develop tools and frameworks for prompt management, automated evaluations, and observability.
  • Monitor and improve agentic systems performance for accuracy and efficiency.
  • Provide ongoing support, troubleshoot issues, and implement updates for ML solutions
  • Build and maintain data processing pipelines for high volumes of structured and unstructured data.
  • Integrate third-party AI APIs (internal and external) to extend the functionality of systems.
  • Stay updated on GenAI, NLP, ML, and IR technologies, incorporating best practices and leveraging cloud infrastructure for efficiency.
  • Build and extend internal products on top of the LangChain ecosystem (LangGraph, LangSmith) to support prompt management, evaluation, and agent orchestration across the team.

Must-have Skills:

  • Bachelor's or Master's degree in Computer Science, Engineering, Data Science, or a related STEM field or equivalent work experience.
  • 4+ years of industrial experience in a machine learning engineering or data engineering role.
  • Strong programming skills in Python and/or another high-level language commonly used in machine learning.
  • Experience deploying LLMs, implementing automated evaluation pipelines (LLM-as-a-judge), and architecting multi-agent systems that utilize tool-calling and long-term memory to solve non-linear problems.

Nice-to-have:

  • AI Tooling Proficiency: Leverage one or more AI tools to optimize and augment day-to-day work, including drafting, analysis, research, or process automation. Provide recommendations on effective AI use and identify opportunities to streamline workflows. 
  • Familiarity with cloud-based infrastructure and services (e.g., AWS and GCP), Docker, and the Git version control system
  • Familiarity with consuming and integrating APIs in a reliable and secure manner.

 

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.

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How to Get Hired at Wizeline

  • Tailor your resume to each specific Wizeline role — Greenhouse applications are evaluated per-position
  • Wizeline uses Greenhouse to manage applications; PDF format preserves your formatting through their parser
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