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Mid/Senior AI LLM Engineer (Full Remote - Europe)

EverAI· R&D
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Remote€75k - €125kFull-timePosted 5d ago

About the role

Role focused on improving self-hosted, fine-tuned open-weight LLMs to power a consumer-scale AI companionship platform, including data, post-training, evals, model behavior, and production deployment.

Responsibilities

  • Fine-tune open-weight LLMs using SFT, LoRA/QLoRA and post-training methods such as DPO and GRPO
  • Diagnose model failures and turn them into experiments. Decide whether the answer is better data, post-training, prompting or classifiers
  • Build training data and evals that directly shape what gets trained next
  • Improve model behavior across personalization, consistency, tone, multilingual and group interactions
  • Ship to production and use real user behavior to guide the next iteration
  • Speed up the training loop so experiments are faster, easier to compare, and more reproducible

Qualifications

  • You’ve personally post-trained open-weight LLMs for a user-facing product and shipped them to production
  • You’ve worked where AI was core to the product or business, not an experimental side feature
  • Fine-tuning is core to your experience
  • Strong Python, PyTorch and Hugging Face, with hands-on GPU training and debugging
  • You build data and evals yourself and make decisions from evidence
  • You can take work beyond notebooks into production
  • You use AI tools daily in your own engineering work
  • You are fully comfortable working with uncensored models and explicit NSFW content, including harmful material when developing and evaluating moderation system

Skills

Required:Post-training / fine-tuning of LLMsPythonPyTorchHugging Face

Benefits

  • Paid Time Off: 4 weeks (20 working days) of PTO per year
  • Annual in-person gathering
  • Health & Wellness support with monthly $100 health insurance allowance and OpenUp access
  • Co-Working Space Budget (up to two visits/month)
  • Learning Budget for professional growth
  • Company Laptop & Equipment with budget for peripherals
  • AI Tools Access (premium tools)
Last updated Oct 22, 2026. Interested? Apply on the company site.

About EverAI

Building the future of AI Companionship

EverAI is building the future of AI companionship. Our products redefine how people connect with intelligent, safe, and immersive AI. Backed by a world-class remote team and driven by rapid innovation, we're on a path to scaling fast towards 500M users and beyond.

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