LLM Engineer

The role

You will spearhead the development and integration of advanced language model capabilities across the Ultralytics ecosystem. This involves merging large language models with computer vision technologies.

What you will do

• Developing and scaling robust LLM-powered applications using various APIs
• Implementing and managing multi-API workflows
• Building sophisticated Retrieval-Augmented Generation (RAG) systems
• Designing and maintaining efficient data pipelines and vector storage solutions
• Fine-tuning LLMs on custom datasets
• Collaborating with the YOLO development team to build multimodal solutions
• Automating deployment and testing processes using CI/CD pipelines

Required qualifications

• 5+ years of experience in software engineering, with a strong focus on AI and machine learning (ML)
• Expert-level proficiency in Python
• Expert-level proficiency in deep learning frameworks, particularly PyTorch
• Proven experience building and deploying applications with LLM APIs such as OpenAI, Anthropic, Gemini, and DeepSeek
• Hands-on experience with the full RAG pipeline, including vector embeddings, rerankers, and data indexing in databases like MongoDB
• Practical knowledge of LLM fine-tuning, prompt engineering, and performance optimization
• Familiarity with MLOps principles and tools, including CI/CD with GitHub Actions
• Excellent problem-solving skills

Nice to have

• A strong interest in computer vision
• An understanding of object detection models like Ultralytics YOLO26

Benefits

• Competitive salary
• Equity packages
• Hybrid flexibility: 3 days per week in our brand-new office — 2 days remote
• 24 days vacation
• Your birthday off
• Local holidays
• Flexible working hours
• Engage with cutting-edge AI projects and leading open-source software
• Brand-new Apple MacBook Air/Pro, Apple Studio Display, and AirPods Pro 3
• Supportive and passionate team environment

Before you apply

• Applicants must have legal authorization to work in the UK
• Ultralytics does not provide visa sponsorship

About the company

Ultralytics commits to relentless innovation in the AI space to produce the world's best YOLO AI models. The company operates in a high-intensity environment for world-class talent.