LLM engineer (France)

We are looking for an LLM engineer for relocation to France (the 1st month you may work remotely).

Our client is an AI startup headquartered in Paris, France. It was founded just at the beginning of 2025.

Guys have already raised $11mln from various VCs and co-founders and C-level managers of Open AI, Datadog etc.

The company is building the safety, reliability, and optimization layer for AI systems.

At its core are policies — simple natural-language rules that describe what an AI should and should not do, and what users can and cannot do. White Circle test, enforce, and continuously improve these policies automatically.

The product covers — tests and protects content reliability, tool use, brand identity, confidentiality, unsafe content, resource abuse, prompt attacks, legal & compliance — more are coming!

The product is already in production (invite-only mode for B2B clients).

About the role

You will be developing the product as a Data scientist.

It’s needed to take a cluster of GPUs and turn raw data into production-ready LLMs and VLMs.

Your future tasks

• Train LLMs and VLMs using distributed frameworks (Megatron, DeepSpeed, etc.).

• Design and implement Mixture-of-Experts architectures for efficient scaling.

• Build multimodal training pipelines that handle text, images, and audio.

• Write custom Triton kernels to optimize training bottlenecks.

• Experiment with new architectures, hyperparameters, and data mixtures.

We expect that you

• Experienced in LLM engineering as a Senior.

• Have fine-tuned models.

• Know the ins and outs of distributed training: tensor parallelism, pipeline parallelism, expert parallelism, ZeRO, FSDP.

• Have worked with multimodal architectures (Llava-style, Flamingo-style, or similar).

• Care about training stability, convergence, and squeezing maximum performance from hardware.

Amazing, if you have

• Experience in writing Triton kernels to speed up attention, MLP layers, or custom ops.

• Olympic background (ACM-ICPC or others).

• English language at B1/B2 level

Company offers

• An opportunity to impact a great product and be at the root of its development.

• A relocation package covers the flight, visa, and the first 2 weeks of accommodation.

• Contract in France.

• The first month — remote work, followed by relocation within 3 months.

• Health insurance, paid meals, and English courses.

• No corporate bullshit, only common sense and collaboration.