Overview

Social Discovery Group (SDG) is one of the world’s largest groups of social discovery companies, uniting millions of users on dozens of products. SDG solves the problem of loneliness, isolation, and disconnection – transforming virtual intimacy into the new normal. SDG products redefine the way people interact and connect with each other.

Responsibilities:
  • 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
Required 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
Benefits:
  • 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. According to the paychecks, if you are not eligible for corporate medical insurance, the company will compensate you with up to $ 1,000 gross per year per employee. This can be spent on self-purchase of health insurance or on 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 the other locations, the company provides reimbursement of workplace costs up to $ 1000 gross once every 3 years, according to the paychecks. This money can be spent on the rent of the co-working room, on equipping the working place at home (desk, chair, Internet, etc.) during those 3 years
  • Internal gamified gratitude system: receive bonuses from colleagues and exchange them for our merchandise, team building activities, massage certificates, etc.
Nice To Have:
  • 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
  • Experience with multimodal LLMs
  • CV background and image/video model experience
  • Distributed training on large-scale datasets (millions to billions of samples)
Technologies:
  • transformers
  • PyTorch
  • Python
  • Go
  • C#
Note:

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