Ultralytics LLM Engineer

Ultralytics seeks an LLM Engineer to advance large language model capabilities. This is a full-time, permanent role based in Madrid with Remote EURO timezone option. Ultralytics serves over 100,000 organizations worldwide using YOLO technology.

Posted: January 3, 2025 (still active)

Key Responsibilities:

• Researching, fine-tuning, and deploying state-of-the-art LLMs
• Developing APIs and tools to enable seamless integration of LLM functionalities
• Optimizing model performance for scalability and efficiency
• Building internal tools leveraging LLM capabilities
• Designing and deploying Retrieval-Augmented Generation (RAG) applications
• Enhancing query enrichment and reranking systems
• Ensuring compliance with SOC 2 and ISO standards
• Community engagement and technical documentation

Required Qualifications:

• 5+ years of experience with Python and AI/ML frameworks
• Extensive experience working with LLMs and transformer architectures
• Strong NLP fundamentals: tokenization, embeddings, fine-tuning
• Production-level LLM deployment experience
• Expertise with APIs from Anthropic, OpenAI, Voyage, DeepSeek, and Gemini
• RAG application design and implementation
• Strong debugging and optimization skills
• Docker and cloud deployment (AWS, GCP, or Azure)

Compensation & Benefits:

• Competitive salary (experience and location-dependent)
• 24 days paid vacation, your birthday off, plus local holidays
• Home setup allowance: $550
• MacBook Air provided
• Flexible hybrid/remote work

Candidates must be eligible to work as an independent contractor in their home country. No visa sponsorship.