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Mid/Senior AI LLM Engineer

David Kennedy Recruitment · China, Croatia, Cyprus, Denmark, Estonia, France, Germany, Greece, Hong Kong, Hungary, India, Israel, Italy, Japan, Malaysia, Netherlands, Norway, Phi

Remote Contract Data Science External

Remote roles may have location, time-zone, or work-authorization requirements. Review the employer's requirements before applying.

Posted by source:

Application deadline: December 21, 2026

Job description

Source: Himalayas — original listing

David Kennedy Recruitmentis working with a company developing AI-powered conversational products, that is seeking to onboard a Mid/Senior AI LLM Engineerto join their team remotely.

The role focuses on fine-tuning and improving self-hosted large language models that power personalised AI conversations. You will work hands-on with open-weight models, training datasets, evaluation frameworks and GPU-based training, taking model improvements from experimentation through to production deployment.

Position: Mid/Senior AI LLM Engineer

Location: Europe, Remote

Employment type: B2B engagement

DUTIES AND RESPONSIBILITIES

  • Train and fine-tune existing AI language models to improve their conversational abilities
  • Prepare and improve training datasets to help models produce more accurate, natural and consistent responses
  • Develop testing methods to measure model quality and identify areas for improvement
  • Improve conversational memory, personality consistency and long-running dialogue
  • Develop multilingual conversational capabilities and interactions involving multiple characters
  • Investigate model failures and optimise training data, prompts and response filters
  • Run model training experiments using GPUs and troubleshoot technical issues
  • Deploy improved models into production, monitor their performance and continue refining them
  • Collaborate with AI engineering, product, web development and DevOps teams

REQUIREMENTS

  • Proven hands-on experience fine-tuning open-weight AI language models and deploying them into production

•

Strong Python programming skills

  • Practical experience with PyTorch and Hugging Face or comparable machine-learning tools
  • Experience with model training techniques such as supervised fine-tuning, LoRA and QLoRA
  • Familiarity with preference-based training techniques such as DPO or GRPO
  • Experience building training datasets and model evaluation frameworks
  • Practical experience with GPU-based training and debugging
  • Ability to analyse model behaviour, troubleshoot issues and demonstrate measurable improvements
  • Experience working with consumer-facing AI products
  • Comfort working with uncensored AI models, explicit adult/NSFW content and sensitive moderation material

BENEFITS

•

Fully remote working within Europe

  • Long-term collaboration, with B2B contracting preferred

•

20 working days of paid leave

•

$100 monthly health insurance allowance

•

Equipment budget

•

Access to AI development tools

•

Learning and development support

•

Annual team gathering

  • Opportunity to work on self-hosted LLMs powering consumer-facing AI products

•

And many more!!!

Originally posted on Himalayas

Time-zone restrictions (UTC offsets): -1, 0, 1, 2, 3, 5.5, 6, 7, 8, 9

Eligible locations: China, Croatia, Cyprus, Denmark, Estonia, France, Germany, Greece, Hong Kong, Hungary, India, Israel, Italy, Japan, Malaysia, Netherlands, Norway, Philippines, Poland, Portugal, Qatar, Saudi Arabia, Singapore, South Korea, Spain, Sweden, Taiwan, Thailand, United Kingdom, Vietnam

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