Mid/Senior AI LLM Engineer

🔥 1 hour ago

🇪🇸 Spain – Remote

💵 €75k - €125k / year

⏰ Full Time

🟠 Senior

🗣️ LLM Engineer

👻 Ghost score 21%

What it means: the chance that no one is really hiring for this job.How to read it: 60% or higher means we think this is a ghost. Lower scores are less of a worry.How we score it: age, reposts, open roles vs team size, how fast jobs close, and whether pay is listed.Fine print: an estimate from public data, not a judgment of the company. Real jobs can score high, so treat it as a hint, not a fact.

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EverAI

WebsiteLinkedInAll Job Openings

51 - 200 employees

Founded 2023

🤖 Artificial Intelligence

🎮 Gaming

Artificial Intelligence • Gaming • Entertainment

EverAI is a pioneering company specializing in conversational AI that transforms the entertainment landscape. By creating AI experiences for roleplay, gaming, social interactions, and creative writing, EverAI enriches storytelling and gaming with engaging interactions. Their AI companions enhance roleplaying journeys, elevate gaming experiences with dynamic characters, and assist writers with creative suggestions, aiming to revolutionize how stories are told and games are played.

📋 Description

• Fine-tune open-weight LLMs using SFT, LoRA/QLoRA, DPO, and GRPO • Diagnose model failures and determine whether to improve data, post-training, prompting, or classifiers • Build training data and evaluations that shape future training • Improve model behavior across personalization, consistency, tone, multilingual, and group interactions • Ship models to production and use real user behavior to guide iteration • Speed up the training loop for faster, easier-to-compare, and more reproducible experiments • Work across data, post-training, evaluations, and model behavior • Collaborate with the LLM Tech Lead, CTO, Product, Web, and DevOps teams • Improve self-hosted, fine-tuned open-weight models powering EverAI's AI companionship platform used by 50M+ users

🎯 Requirements

• Personally post-trained open-weight LLMs for a user-facing product and shipped them to production • Worked where AI was core to the product or business • Fine-tuning is core to your experience • Strong Python, PyTorch, and Hugging Face skills • Hands-on GPU training and debugging experience • Build training data and evaluations independently and make evidence-based decisions • Ability to take work beyond notebooks into production • Use AI tools daily in engineering work • Fully comfortable working with uncensored models and explicit NSFW content, including harmful material when developing and evaluating moderation systems • Experience with conversational AI, roleplay products, or highly personalized consumer AI is a bonus • Experience with multilingual LLMs is a bonus • Experience with moderation, safety, or adversarial testing is a bonus • Experience with multimodal models is a bonus • Open-source LLM or post-training contributions are a bonus

🏖️ Benefits

• 4 weeks (20 working days) of paid time off per year • Fully remote work from anywhere • Annual in-person meetup • Monthly allowance of 100 USD for health insurance expenses • Unlimited 1:1 sessions with psychologists and lifestyle experts through OpenUp, available to up to three family members • Co-working space budget up to twice per month (35 EUR / 40 USD per visit) • Learning budget for courses, books, conferences, events, or certifications • Company laptop • Monitor budget up to 250 USD • Keyboard/mouse/mic/headphones budget up to 150 USD • Premium access to ChatGPT, Hugging Face, Claude Code, and other tools needed for the role

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