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Preferred Networks | Tokyo or Remote in Japan | Full-time | https://www.preferred.jp/en

💼 Full-time🗓 2026-08-03 → 2026-09-28

Core

Build software infrastructure to serve LLMs using in-house inference accelerators and optimize inference engines for API services.

Role type

Senior IC systems engineer (LLM inference)

Builds

In-house LLM serving infrastructure and optimized inference engines for API services

Domain

AI infrastructure, LLMs, custom hardware acceleration

Deliverable

production ML models

Required skills

LLM serving, inference optimization, custom hardware acceleration, API service maintenance, open source contribution

Preferred skills

Experience with vLLM, MN-Core series, PLaMo series

Technologies

MN-Core, vLLM, PLaMo, Optuna, CuPy

Responsibilities

Build software infrastructure to serve LLMs using upcoming inference accelerator MN-Core L1000; Improve the inference engine powering API service; Maintain PLaMo implementations in open source projects

Seniority

Senior, hands-on IC

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