Mid/Senior AI LLM Engineer (Full Remote - Netherlands)
Level inferred from job title
Job description
LLM engineer role at EverAI focused on fine-tuning and post-training self-hosted open-weight models that power a large-scale AI companionship product. The role sits in a small AI team and takes ideas from failure analysis through to production.
At a glance
- Employment
- Employee or contractor
- Work mode
- Remote · Netherlands, Portugal
What you'll do
- 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
What we're looking for
- 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
Nice to have
- Experience with conversational AI, roleplay products, or highly personalized consumer AI
- Multilingual LLMs
- Moderation, safety, or adversarial testing
- Multimodal models
- Open-source LLM / post-training contributions
Benefits
Health & Wellness Support: Monthly allowance of 100 USD for health insurance expenses & access to unlimited 1:1 sessions with psychologists and lifestyle experts through OpenUp (also available to up to three of your family members)
Company Laptop & Equipment: Laptop provided + monitor budget up to 250 USD + keyboard/mouse/mic/headphones budget up to 150 USD
- Contract Type: We prefer B2B, but we're flexible
- Work From Anywhere: Fully remote
- Paid Time Off: 4 weeks (20 working days) of PTO per year
- Annual Gathering: A yearly in-person meetup
- Co-Working Space Budget: Work from a co-working space up to twice per month (35 EUR / 40 USD per visit)
- Learning Budget: Dedicated funds for courses, books, conferences, events, or certifications
- AI Tools Access: Premium access to ChatGPT, Hugging Face, Claude Code, and any other tool needed
Apply
Direct apply at EverAI
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About EverAI
Building the Future of AI Companionship
EverAI builds AI companionship products, including the world's largest AI companionship platform, governed by its proprietary moderation system EverGuard. One of the Top 15 Largest & Fastest-Growing AI Companies in the World with 50 million users in 2 years.
Key facts
- ≈ 100 people
- AI companionship
- 50 Million Users in 2 years
- One of the Top 15 Largest & Fastest-Growing AI Companies in the World
- Flagship product is the world's largest AI companionship platform
- Governed by proprietary moderation system EverGuard
- 100% remote team
- Most traffic runs on self-hosted, fine-tuned open-weight models
What they value
- Ownership
- Velocity
- Radical creativity
- Ethical core