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

📋 Description

• 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
• Build training data and evals that directly shape what gets trained next
• Improve model behavior across personalization, consistency, tone, multilingual and group
• 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

🎯 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, 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
• Build data and evals yourself and make decisions from evidence
• Take work beyond notebooks into production

🎁 Benefits

• Work From Anywhere: Fully remote. Choose the environment where you do your best work
• Paid Time Off: 4 weeks (20 working days) of PTO per year to recharge and reset
• Annual Gathering: A yearly in-person meetup to connect, brainstorm, and celebrate wins together
• Health & Wellness Support: Monthly allowance of 100 USD for health insurance expenses &amp
• Co-Working Space Budget: Work from a co-working space up to twice per month (35 EUR / 40 USD per
• Learning Budget: Dedicated funds to support your professional growth: courses, books, conferences