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Lead LLM Engineer
Summary by AIEngineer.careers
Lead LLM Engineer is a LLM Engineer role (full-time). with Leonar. in PARIS, FR. Imported listing (source: licornesociety.com). Apply on the employer's site (licornesociety.com).
Imported listing (source: licornesociety.com) · Apply on licornesociety.com
PARIS · FR
—
Full-time
SENIOR
The sections below reproduce the third-party job description for reference. AIEngineer.careers does not write or control this text.
Imported job description
Sourced from licornesociety.com
Leonar is hiring a Lead LLM Engineer to make AI outputs reliable, fast, and indispensable in real workflows. You will design and evolve the LLM/agent architecture, own output quality across key use cases, and build evaluation systems to drive continuous improvement. This role is ideal for someone who ships production LLM systems and thrives on evaluation-driven development.
Responsibilities
- Design and evolve the LLM/agent architecture
- Own output quality across key use cases (emails, document analysis, etc.)
- Build evaluation systems (datasets, metrics, regression detection)
- Drive fast iteration loops from production data
- Improve retrieval, reasoning, and tool usage
- Ensure production reliability (latency, failure modes, fallback)
- Work directly with product and founders on what to build and why
Requirements
- Experience shipping real LLM systems in production
- Understanding of RAG, tools, agents, and structured outputs
- Ability to design full pipelines, not just prompts
- Experience with evaluation-driven development (defining quality metrics, building datasets, running continuous evals)
Leonar
Paris · FR · 3+ employees
Leonar is an all-in-one recruiting operating system for agencies. It combines AI sourcing, data enrichment, multichannel outreach, CRM/ATS workflows, candidate ranking, and centralized recruiting pipeline management.
