Company brief · updated 2026-10-19
spellbrush.com · Consumer · magic anime pictures
Today: niji・journey, the anime/illustration image-generation service the site describes as Midjourney's manga/illustration division, run with Spellbrush
Roles: HPC/ML Infrastructure Engineer · AI Anime Researcher · AI Infrastructure Engineer
Requirements mention: large-scale diffusion models · TPU training · GPU workloads · on-prem and multi-cloud clusters · SLURM · Ceph
Inference: the newest opening (HPC/ML Infrastructure Engineer, June 2026) describes building an anime AI training cluster to train an anime image model. Two 2024 roles work on the diffusion models and inference behind niji・journey. Together they suggest continued investment in the company's own training compute for niji・journey's image models. The two 2024 roles have been open for over two years.
Today: Games, alongside Arrowmancer, the smartphone action RPG described on the site
Roles: 3D Game Programmer (Unity) · AI Anime Researcher - LLM · AI Anime Researcher - Motion Generation Models
Requirements mention: in-house LLM storytelling system · LLM post-training · real-time 3D motion generation · 3D character animation
The postings state that a 3D first-person adventure game built around an AI companion is in development. Inference: the LLM and motion-generation research roles suggest the companion's storytelling and animation are being built in-house. All three roles have been open since September 2025.
Today: Mobile games; the site describes Arrowmancer as a smartphone action RPG
Roles: Level Designer · Game Programmer (Unity)
Requirements mention: tactics games · in-house level design tools · C# · Unity
Stated in a posting, not inferred: the Game Programmer (Unity) posting describes an 'upcoming anime mobile tactics game'. This is a different game from Arrowmancer. The Level Designer is based in San Francisco or Tokyo; the Game Programmer is in San Francisco.
Today: Not stated on the site; the Software Engineer posting gives the only description
Roles: Software Engineer
Requirements mention: scalable data solutions · big data toolset
No inference drawn. This is a single role in San Francisco, so it is a weak signal.
Today: Not stated on the site; the Front-End Engineer (Anime) posting gives the only description
Roles: Front-End Engineer (Anime)
Requirements mention: interaction-heavy single-page editors · webGPU · tasteful UI
No inference drawn. This is a single role in San Francisco, so it is a weak signal.
| Department | Open |
|---|---|
| Research Team | 7 |
| Games Team | 3 |
Of 10 open roles, 7 are in the Research Team and 3 in the Games Team. No roles were opened or closed in the last 60 days. Six roles date from 2024, three from 2025, and one from June 2026.
Seniority: Mid 3, senior 1, unknown 6.
Skills named most: Unity (3), C# (2), in-house LLM storytelling system (2), SLURM (1), Linux sysadmin skills (1), Ceph (1), ansible (1), Pytorch (1), JAX (1), diffusion models (1), LLM post-training (1), 3D character animation (1)
Locations: San Francisco or Tokyo (5), San Francisco (4), Tokyo (1). One role, the 3D Game Programmer (Unity), is marked remote, with location given as San Francisco or Tokyo. The HPC/ML Infrastructure Engineer is marked on-site. The other eight roles do not state remote status.
If you're applying: There are ten open roles, but nine were posted in 2024 or 2025. Confirm a role is still active before investing time in it. The most recent is the HPC/ML Infrastructure Engineer (June 2026). Check the listed requirements (C#, Unity, SLURM, Pytorch, JAX) against your own experience before applying.
If you're selling or recruiting: There are ten open roles, with no new or closed postings in the last 60 days, and most date from 2024 to 2025. The Research Team holds 7 of them. The only recent opening is HPC/ML Infrastructure Engineer work on an anime AI training cluster. The 3D Game Programmer (Unity) is the only role marked remote; eight roles do not state remote status.
| Title | Department | Location | Posted |
|---|---|---|---|
| HPC/ML Infrastructure Engineer | Research Team | San Francisco or Tokyo | 2026-06-15 |
| 3D Game Programmer (Unity) | Research Team | San Francisco or Tokyo (remote) | 2025-09-02 |
| AI Anime Researcher - LLM | Research Team | San Francisco or Tokyo | 2025-09-02 |
| AI Anime Researcher - Motion Generation Models | Research Team | San Francisco or Tokyo | 2025-09-02 |
| Level Designer | Games Team | San Francisco or Tokyo | 2025-08-01 |
| Game Programmer (Unity) | Games Team | San Francisco | 2024-10-30 |
| Software Engineer | Research Team | San Francisco | 2024-10-30 |
| AI Anime Researcher | Research Team | Tokyo | 2024-02-07 |
| AI Infrastructure Engineer | Research Team | San Francisco | 2024-02-07 |
| Front-End Engineer (Anime) | Games Team | San Francisco | 2024-02-07 |