Senior NLP Engineer

Role Description

We are looking for a Senior NLP Engineer. Your main tasks will be:

• Train and fine-tune language models powering our AI companions
• Own and improve agent harnesses, agentic loops, and the chat interface algorithm
• Build and maintain the full LLM stack — from model training to production deployment
• Track cutting-edge NLP research and open-source developments; translate them into an NLP roadmap for the ML team
• Collaborate closely with the validation, content, and dataset preparation teams to design experiments and measure model quality

Qualifications

• Deep experience training and fine-tuning large language models
• Hands-on experience building agent harnesses and agentic pipelines
• Strong understanding of RLHF, DPO, and other alignment/post-training techniques
• Proficiency with transformers, PyTorch, and related libraries
• Experience at AI-focused startups or companies (Character AI, OpenAI, and similar is a strong plus)
• Backend engineering experience (Python, Go, C#) and knowledge of scalable deployment systems is a significant advantage

Requirements

• Experience with multimodal LLMs
• CV background and image/video model experience
• Distributed training on large-scale datasets (millions to billions of samples)

Benefits

• REMOTE OPPORTUNITY to work full-time
• The initial pay level or pay range for this role will be shared with candidates during the recruitment process and before the commencement of employment
• Vacation: 28 calendar days per year
• 7 wellness days per year (time off) that can be used to deal with household issues, to lie down and recover without taking sick leave
• Bonuses up to $5000 for recommending successful applicants for positions in the company
• 50% payment for professional training, international conferences, and meetings
• Corporate discount for English lessons
• Health benefits: If you are not eligible for corporate medical insurance, the company will compensate you with up to $1,000 gross per year per employee for health insurance or doctor's fees for yourself and close relatives (spouse, children)
• Workplace organization: The company provides all employees with an equipped workplace and all the necessary equipment (table, armchair, wifi, etc.) in our offices or co-working locations. In other locations, the company provides reimbursement of workplace costs up to $1000 gross once every 3 years
• Internal gamified gratitude system: receive bonuses from colleagues and exchange them for our merchandise, team building activities, massage certificates, etc.