AI Engineer - Series A - HR Tech

fledge; Barcelona; Presencial; EUR 90.000 - 150.000; Jornada completa

Ventajas ofrecidas por este puesto de trabajo

Equity plan

Relocation support

Visa administration

Top of market salary

Descripción de la vacante

Fledge is seeking a senior AI Engineer with hands-on experience with Large Language Models (LLMs) to design and deploy robust AI-powered solutions. You will focus on evaluating and improving model performance, tuning workflows, and building scalable backend systems and APIs.

Proficiency in Python is preferred, and experience with LLM toolchains is highly valued. Join a boutique talent search firm serving AI and software clients across EMEA, with top market compensation and relocation/visa

Formación

• Proven experience with LLMs (e OpenAI, HuggingFace, LangChain, LangGraph).
• Strong Python programming skills preferred.
• Experience evaluating, experimenting with, and tuning AI models/solutions.
• Experience designing and using evaluation frameworks for AI systems, esp. LLMs.
• Familiar with backend development, RESTful APIs and scalable design.
• Knowledge of ML concepts/tools (e.g., PyTorch, Scikit-learn) is advantageous.

Responsabilidades

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

Conocimientos

LLMs

Python

Evaluation frameworks

Backend development

RESTful APIs

ML concepts

Educación

Master’s degree in CS/Engineering

Herramientas

PyTorch

Scikit-learn

HuggingFace

LangChain

LangGraph

Descripción del empleo

Fledge

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

Job Summary

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.

In this role, you will

• 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.

Required Skills and Qualifications

• Proven experience working with LLMs (e 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)

In return, they offer

• Top of the market salary
• Equity plan
• Relocation support
• Visa administration

Diversity, Equity, Inclusion and Belonging

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.

Important

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 - [e-mail]