Research Engineer, AI Agents & LLM Systems

Research Engineer, AI Agents & LLM Systems

Paris, France - Onsite

An established global technology company is growing its AI research team in Paris, working across LLMs, advanced computing and new applications of AI. The team is looking for a Research Engineer, AI Agents & LLM Systems, to work alongside experienced researchers and engineers.

The successful Research Engineer, AI Agents & LLM Systems, will build and test AI agents that can reason through tasks, use tools, retrieve information and complete multi-step workflows. You will have the freedom to explore new ideas, build prototypes, run experiments and turn the approaches that work into reliable, reusable systems. This is a hands-on role suited to someone who enjoys both writing code and solving open-ended research problems.

Key Responsibilities

• Build AI agents using LLMs and multimodal foundation models.
• Develop systems involving tool use, planning, memory, retrieval and code execution.
• Design benchmarks and experiments to evaluate agent performance.
• Prototype and test new research ideas.
• Analyse failures and improve reliability, efficiency and latency.
• Work closely with researchers and engineers on new AI systems.

Required Experience & Skills

• PhD in Computer Science with at least 2+ years of relevant industry or applied research experience.
• Excellent publications history with at least one first-author published at one of the top ML or systems research conferences.
• Demonstrable experience with LLMs, Transformers and generative AI.
• Hands-on experience building LLM agents, tool-using agents, coding agents, computer-use agents or other multi-step AI systems.
• Strong Python, PyTorch and software engineering skills.
• Strong experimental, analytical and problem-solving skills.
• Experience independently delivering substantial technical projects.
• Strong English communication skills.
• Desirable: experience serving or optimising open-source language models.

Why Apply?

• Work on advanced AI agents, LLM systems and multimodal foundation models at the forefront of generative AI research.
• Combine hands-on software engineering with applied research, experimentation and independent technical ownership.
• Work alongside experienced AI researchers and engineers on technically challenging problems where there is scope to explore new approaches.
• Develop systems covering areas such as tool use, planning, memory, retrieval, computer use and autonomous multi-step workflows.
• Take research ideas beyond prototypes by contributing to robust, reusable systems and internal demonstrations.
• Join a global technology organisation with significant investment in research, artificial intelligence and advanced computing.

Apply now or send a copy of your CV, referencing the title and location, and with a short introduction to [email protected].

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