AI Engineer (Goon-core, Python)

Top 3 reasons to join us

• Exciting product ecosystem
• Strong, talented team and dynamic culture
• Your probationary period is 100% of salary

Job description

ROLE SUMMARY 

We’re building the world’s spiciest AI companion platform. Your mission: fine-tune open-source LLMs, craft insanely real NSFW dialogue and image gen, and push those models into production at break-neck speed. 

If “prompt engineering” feels like foreplay and you instinctively know the difference between vanilla and gooning, keep reading.

MISSION OUTCOME
Ship model updates that meaningfully boost user retention, intimacy, and paid conversion.

CORE RESPONSIBILITIES

• Model Customization & Tuning
  • Select / fine-tune SOTA LLMs (Llama-3-70B, Mixtral-8×22B, Phi-3-mini, DeepSeek etc.) using LoRA / QLoRA + Flash-Attention.
  • Build and curate a private dataset of explicit-but-policy-safe chat logs; reinforce with RLAIF on real user data.
• Prompt & Persona Engineering
  • Design multi-level prompt stacks (system → persona → scene → user) that ramp intimacy over time.
  • Create auto-temperature systems to keep chats spicy yet sustainable.
• Conversation Intelligence
  • Architect long-term memory with vector DB + semantic tagging.
  • Implement emotion / kink classifiers (RoBERTa or Tiny-Mistral) to steer replies dynamically.
• Multimodal Integration
  • Hook diffusion / TTS models for image, video, and audio replies.
  • Optimize on-device inference (Core ML / NNAPI) for low-latency bursts.
• Safety & Compliance
  • Build tiered filters: soft in-prompt guardrails, hard regex / classifier gates.
  • Iterate A/B tests to balance freedom and user safety.
• Infra & Deployment
  • Containerize with Docker; auto-scale on AWS / Vast.ai spot GPUs.
  • CI/CD pipeline for nightly retrains and canary releases to 5% of traffic.
• Collaboration & Culture
  • Pair daily with product, design, and mobile teams; prototype features in days, not quarters.
  • Mentor juniors, share cursed anime memes in Slack, and keep the office vibe spicy

Your skills and experience

• Proven track record fine-tuning LLMs (link to repo / model card).
• Fluency in Python + PyTorch; Rust or Go a plus.
• Deep familiarity with hentai, ero-manga, waifu tropes, and r/GoonsGoneWild culture.
• 3+ years shipping ML to prod, preferably at fast-moving start-ups.
• Ability to design content-safety systems without neutering the experience.
• Diffusion or TTS model experience for adult content.

EXTRA CREDIT

• iOS / Android on-device ML optimisation.

PERKS

• Revenue-share tokens once Foxy passes 1M MAU.
• Zero corporate HR cringe – just build stuff fast.

PROS & CONS

• Massive impact: Your code shapes millions of horny chats.
• Greenfield: Minimal legacy baggage.
  – Adult content: If you’re squeamish, bail.
  – High velocity: Comfort zones die here.

Why you'll love working here

What We Offer:

• Competitive salary with above-market rate compensation.
• Opportunity to work on exciting and innovative game projects with a passionate and talented team.
• A collaborative and dynamic work environment in either Hanoi or Ho Chi Minh City.
• Career growth and development opportunities within a rapidly expanding game studio.
• Access to the latest tools, technologies, and industry trends.

If you have a passion for casual mobile gaming, project management expertise, and a strong business acumen, we want to hear from you!