Machine Learning Engineer (AI)

Location: Hybrid in Barcelona, Spain, with remote work balanced with in-person collaboration at the Barcelona office.

Annual salary: €70,000–€100,000, plus equity.

Company

hirify.global is building an AI platform for legal work used by more than 20,000 legal professionals across Italy, Spain, Germany, France, and Bulgaria.

What you will do

• Design and build agent-driven and RAG-based AI systems for complex legal tasks.
• Fine-tune and post-train large language models using supervised and reinforcement learning techniques.
• Develop and optimize large-scale search pipelines for LLM-powered agents.
• Implement NLP algorithms to extract, structure, and validate information from legal documents.
• Run end-to-end evaluations to identify bottlenecks, measure performance, and guide improvements.
• Work with legal experts to design evaluation protocols and build domain-specific datasets while maintaining coding, review, and engineering standards.

Requirements

• Proven expertise in building and managing robust machine learning pipelines.
• Strong Python skills and hands-on experience with LLM research and deep learning systems.
• Knowledge of search technologies, including full-text search, vector databases, or other large-scale retrieval systems.
• Ability to collaborate with legal experts, researchers, and engineers.
• Up-to-date knowledge of LLM innovation, ideally including pre-training or deploying large-scale models in real-world scenarios.
• Fluency in written and spoken English.

Nice to have

• Familiarity with MLOps and integrating machine learning models into production backends.
• Experience with pre-training or deploying large-scale models in real-world scenarios.
• Knowledge of Italian.

Culture & Benefits

• Hybrid work with flexibility between remote work and in-person collaboration in Barcelona.
• Health insurance and daily meal vouchers.
• Performance bonuses and an equity package.
• Team retreats and off-sites.
• Autonomous teams with opportunities to lead high-stakes projects and contribute to legal technology standards.