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Multimodal ML Engineer

Npv · Paris

On-siteMidUSD 100k–250k / yrPosted 6 Sept 2026

What this role requires

3 requirements, read out of the advert rather than guessed from the job title:

Also mentioned, not required: Python, LLaVA, Qwen-VL, InternVL, Audio Flamingo, Whisper, HuBERT, Conformer, RLHF, DPO, GRPO. Worth having, but their absence is not what gets a CV filtered out.

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Job description

We're looking for a Multimodal ML Engineer to join White Circle , an AI Safety company building the policy enforcement and optimization layer for AI systems. Backed by $11M from senior leaders at OpenAI, Anthropic, HuggingFace, Mistral, and DeepMind, White Circle processes 100M+ API calls monthly and runs its own LLMs in production.

You will

Train and fine-tune large-scale multimodal models (vision-language, audio, speech, video) from scratch and from pretrained checkpoints.

Design experiments, build multimodal data pipelines, and train MoE architectures.

Build alignment pipelines (SFT, DPO, GRPO), optimize for production (quantization, distillation, streaming), and deploy end-to-end.

Define evaluation metrics that actually matter for the product.

Read the full description (16 more sections)

Requirements

3+ years training large-scale multimodal models.

Strong PyTorch and distributed training experience (DeepSpeed, FSDP).

Deep familiarity with multimodal architectures – LLaVA, Qwen-VL, InternVL, Audio Flamingo, Whisper, HuBERT, Conformer or similar.

Hands-on RLHF/alignment across modalities (GRPO, DPO, reward modeling).

Both audio and video experience required – sequence modeling for each, plus large-scale dataset curation and production inference optimization.

Relocation to Paris or London (hybrid) required.

Bonus

Audio signal processing fundamentals – spectrograms, mel features, noise reduction.

MoE architecture experience.

We offer

$100k–$250k/year salary + equity; higher figures can be negotiated.

Official employment, visa and relocation help.

Compensation: $100K – $250K • Higher figures and equity are negotiable

• $100K – $250K • Higher figures and equity are negotiable

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