Startups · AI

AI Anime Researcher - LLM

Spellbrush · San Francisco or Tokyo · On-site

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About Spellbrush

magic anime pictures. Backed by Y Combinator.

About the role

You will join a small but extremely talented team to define a new kind of video game experience. You'll work alongside top otaku minds in the industry, including the creator of Warudo and Cytoid , a Google Deepmind veteran behind Project Astra , and top-tier AI researchers. As an early member of this team, you will have significant artistic and research freedom to shape what could become the next-generation LLM-driven storytelling experience.

What they're looking for

  • You have a deep understanding of LLM training and evaluation with attention to detail
  • Bonus if your post training work is focused on roleplay
  • Bonus if you have worked on latency optimization. We need to interact with the character in real time
  • Whether that is by designing a RLHF-style voting system, or by finding implicit signals in the human-AI interaction logs
  • Training LLMs requires both research and engineering. Experiences in building data processing backend, deterministic and checkpointable data loader, sharding, memory saving techniques, scalable benchmarking and checkpoint selection, are all helpful
More about this role

tl;dr: We're building a 3D first-person adventure game where an AI companion is the core of the game. Think MiSide with LLMs, but truly integrated with gameplay, not just a RP chatbot.

Here at Spellbrush , we're passionate about making a good anime game.

We also happen to be the world's leading generative AI studio—we're the team behind niji・journey .

Our mission is simple: use AI to bring characters to life and push the boundaries of narrative-driven games.

What We’re Building

We’ve developed an in-house LLM storytelling system that blends AI, story, and gameplay—going far beyond shallow “chat-only” experiences.

The result is an AI companion who cooperates with you in puzzles, remembers across worlds, and changes how each chapter unfolds.

In-game screenshots (development build)

You will join a small but extremely talented team to define a new kind of video game experience. You'll work alongside top otaku minds in the industry, including the creator of Warudo and Cytoid , a Google Deepmind veteran behind Project Astra , and top-tier AI researchers.

As an early member of this team, you will have significant artistic and research freedom to shape what could become the...

Read the full posting on Spellbrush's site ↗

Research Team

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