ML/AI Engineer

After several years of R&D, Lettria has launched its first products — Lettria GraphRAG — and already gained the trust of international clients such as La Poste, Euronext, and Sia Partners. Backed by €8M in seed funding and leading academic partners, we’re building next-generation tools in Document Parsing, OCR, and Graph-based Knowledge Systems.

We’re now looking for a passionate and autonomous ML/AI Engineer to join our small, collaborative, and low-ego team. You’ll work closely with and be directly managed by our Senior ML Engineer, contributing to cutting-edge Generative AI and Retrieval-Augmented Generation (RAG) systems that power the next wave of intelligent knowledge tools.

As an ML/AI Engineer, you’ll play a key role in transforming research into production-ready AI systems.

Your main missions will include:

• Build & evolve our GraphRAG pipeline: Work alongside our Senior ML/AI Engineer to design, develop, and improve our Python-based GraphRAG solution.
• Research & Experimentation: Explore new AI and RAG approaches, evaluate their potential, and contribute to turning experiments into impactful product features.
• Cross-functional collaboration: Partner with Linguistics, Backend, and Product teams to ensure seamless integration of AI capabilities.
• Code Quality: Write clean, efficient, and well-tested Python code following best practices and a strong sense of reproducibility.

We’re looking for someone who combines strong technical skills with curiosity, rigor, and humility.

Must-haves:

• 3+ years of experience with Python
• Strong analytical and mathematical mindset
• Hands-on experience or deep curiosity in GenAI and RAG pipelines
• Ability to move from research to production code
• Clear and structured communication style
• Degree in Computer Science, Machine Learning, or related field

Nice-to-haves:

• Knowledge of Knowledge Graphs (Neo4j, AWS Neptune)
• Familiarity with vector databases (Qdrant, Pinecone)
• Experience with OCR or document analysis
• Exposure to AWS, MLOps, or LLM fine-tuning

• Join a fast-growing AI startup backed by €8M in funding and trusted by top-tier clients.
• Work on cutting-edge Generative AI and GraphRAG technologies with a strong focus on applied research.
• Be part of a small, highly collaborative, and low-ego team where your ideas have direct impact.
• Enjoy flexible remote work, autonomy, and opportunities to grow with the company.
• Collaborate with leading academic and industry experts.

If you’re driven by curiosity, love solving complex AI problems, and want to build impactful products, we’d love to meet you!

Our recruitment process is clear and human-focused, with just a few steps:

1. Intro call with our Senior ML Engineer
2. Technical assessment (Python + problem-solving)
3. Graph RAG use case session (on-site)
4. Interview with our CTO
5. Final discussion with our CEO and Product team

👉 Apply now to join Lettria and help us push the boundaries of applied AI!