株式会社Recho
Open positions
Senior LLM Training Engineer (Post-training)
Senior engineer owning LLM post-training for Recho's voice AI agents: design and run SFT, preference optimization and online RL, including reward design, training-data quality and in-house evaluation. Stack: Python, PyTorch, verl/OpenRLHF/TRL, vLLM/SGLang, FSDP/DeepSpeed. Tokyo hybrid, English-speaking team.
Forward Deployed Engineer（AI Agent）
Forward Deployed Engineer building and tuning Recho's in-house voice AI Agents in enterprise contact centers: designing agent behavior and prompts, integrating with client CRM/CTI systems in real time, implementing post-call workflows, and monitoring production, while feeding learnings back into the product platform. Stack: TypeScript, Python, AWS (ECS, API Gateway, DynamoDB).
Senior AI Inference Engineer (LLM & Speech Models)
A hands-on senior engineer who designs, builds, and optimizes Recho's inference framework for speech models (ASR/TTS/speech-to-speech) and LLMs, owning throughput and GPU cost. Day to day: tuning vLLM/SGLang inference, dynamic batching for variable-length audio, async pipelines, and GPU orchestration with Kubernetes, Slurm, and Ray using Python and PyTorch.
インフラ エンジニア / Infrastructure Engineer
インフラ エンジニア / Infrastructure Engineer 仕事概要 ## 役割：最先端の音声モデル推論基盤とマルチクラウド環境を統括し、AIの社会実装をインフラから支える **■お任せしたい主な業務** **1. セキュリティ・ネットワーク** - 大規模環境におけるネットワーク設計・権限管理の整備 - 金融業界水準のセキュリティ要件に対応するインフラ設計・脆弱性対応 **2. マルチクラウドの運用** - AWS…