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AI Engineer

Hybrid in Barcelona·Full-time·Added over a year ago (last checked 3 Nov)

Agency

Fledge

8 open roles

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Our summary

Work mode: Hybrid, Barcelona
Contract: Full-time
Relocation: A relocation package
Experience: Senior level
Education: Master's degree

Visa options

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Skills

Nice to have

Requirements

What we're looking for

Proven experience working with LLMs (e.g OpenAI, HuggingFace, LangChain, LangGraph).
Strong programming skills, with Python as a plus.
Experience with evaluating, experimenting with, and tuning AI models and solutions.
Experience designing, implementing, and using evaluation frameworks for AI systems, particularly LLMs.
Familiarity with backend development, RESTful APIs, and scalable system design.
Knowledge of ML concepts and tools (e.g PyTorch, Scikit-learn) is advantageous but not required.

Nice to have

Exposure to legal tech, data privacy, or document processing solutions
Master's degree in Computer Science, Engineering, or a related field (or equivalent experience)

Pay & benefits

What you'll get

Top of the market salary
Equity plan
Relocation support
Visa administration

The role

We are seeking a senior AI Engineer with hands-on experience working with Large Language Models (LLMs) to join our team. The ideal candidate will have a strong background in developing, deploying, and optimizing LLM-powered solutions. This role requires a focus on evaluating, experimenting with, and continuously improving the quality and performance of AI systems, including tuning models and workflows. While experience in machine learning is a plus, it is not a strict requirement for this role. Proficiency in Python is preferred.

Collaborate with product, design and legal teams to design and build LLM- based solutions to complex business problems.
Build and maintain scalable backend systems and APIs to support AI- driven features.
Develop tools and workflows for data extraction, semantic search, and document analysis.
Implement and work with agentic flows and enable tool use within AI systems.
Design, build, and maintain robust evaluation frameworks and metrics to measure the performance and quality of LLM-powered solutions.
Use evaluation results to drive iterative improvements and tuning of AI systems.

Hiring process

If you are excited about this opportunity and believe you are a great fit for the role, please send your resume and a brief cover letter outlining your experience and what motivates you to join our client.

About Fledge

Fledge is a talent acquisition and recruitment firm focused on tech companies, helping VC-backed startups find niche tech talent across Europe and the US. The company describes itself as taking a sustainable, holistic approach to hiring, aiming to build teams that grow with the company rather than just filling roles. Fledge operates as Fledge EURL, a French entity (VAT FR62894453539).

Fledge's careers page lists open roles in Spain for engineers and product designers, but these appear to be positions at client companies rather than Fledge's own internal hires. The company's website does not provide details about a physical office in Spain or its work culture there. For international professionals, Fledge's relevance lies in its role as a recruiter connecting candidates with tech opportunities in Spain, though specific information about its local operations is limited.

Industry: Recruitment

In their own words

About the company & team

We are a boutique Talent search firm connecting exceptional Talent with the most innovative companies in the AI and software development industries across EMEA. Our clients are among companies with innovative products that have a positive impact on our societies and we present them with a solution model between fine consulting and flexible recruitment process outsourcing :

Fractional Talent acquisition advisory
Recruitment operation tools
On-demand Talent sourcing expertise

Additional information

We are committed to enabling everyone to feel included and valued and trust our partners to do the same. Both the company and its culture are strongest when composed of diverse experiences and backgrounds.

All qualified applicants will receive consideration for employment without regard to age, color, family, gender identity, marital status, national origin, physical or mental disability, sex (including pregnancy), sexual orientation, or any other characteristic protected by applicable laws.

If you have a medical condition or an individual need for an adjustment to our process, and you believe this may affect your ability to be at your best - please let us know so we can talk about how we can best support you and make any adjustments that may be needed.

In case of any doubts or questions, please contact Julien - j.entresangle@fledge.net

All open roles at Fledge