AI Chatbot Engineer

**About the company:** Slacker Apps Nakano-ku, Tokyo We are a dedicated collective of technologists, innovators, and artists dedicated to crafting compelling digital content. Whether we’re developing cutting-edge applications for clients or pioneering our own in-house projects, our passion for innovation drives everything we do. Read more **Responsibilities:** Maintain and expand our LLM-based orchestration layer (routing, routines, memory, intent handling). Design robust conversation flows with guardrails suitable for public-facing attractions. Integrate STT, TTS, RAG, and animation triggers for real-time character interactions. Work closely with Unity developers, designers, and animators to deliver low-latency, expressive character experiences. Optimise systems for both on-prem and off-prem GPU deployment (4090/5090 boxes, RunPod-style orchestration). Evaluate new models, tools, and approach Requirements 2+ years professional development experience required Strong backend engineering experience in Python or Node.js. Hands-on experience integrating LLMs (OpenAI, Anthropic, fine-tuned models, vector databases). Experience building real-time or low-latency systems. Solid understanding of GPU-based inference and local/remote deployment strategies. Ability to design systems that are stable, observable, and maintainable in production environments. Nice to haves While not specifically required, tell us if you have any of the following. Experience leading or owning AI systems in production. Familiarity with real-time audio pipelines (STT/TTS streaming). Experience with character-driven or conversational UX (games, virtual humans, chatbots, assistants). Knowledge of prompt engineering, fine-tuning workflows, or evaluation tooling. Experience with containerisation, orchestration, or scalable inference infrastructure. Interest in AI safety, guardrails, and content moderation for public-facing products. Curiosity and enthusiasm for staying up to date with the rapidly evolving AI landscape. Compensation ¥5,000,000 ~ ¥8,000,000 annually. APPLY FOR THIS POSITION DO YOU NEED MORE INFO? ASK A QUESTION **Requirements:** 2+ years professional development experience required Strong backend engineering experience in Python or Node.js. Hands-on experience integrating LLMs (OpenAI, Anthropic, fine-tuned models, vector databases). Experience building real-time or low-latency systems. Solid understanding of GPU-based inference and local/remote deployment strategies. Ability to design systems that are stable, observable, and maintainable in production environments. **Nice to have:** While not specifically required, tell us if you have any of the following. Experience leading or owning AI systems in production. Familiarity with real-time audio pipelines (STT/TTS streaming). Experience with character-driven or conversational UX (games, virtual humans, chatbots, assistants). Knowledge of prompt engineering, fine-tuning workflows, or evaluation tooling. Experience with containerisation, orchestration, or scalable inference infrastructure. Interest in AI safety, guardrails, and content moderation for public-facing products. Curiosity and enthusiasm for staying up to date with the rapidly evolving AI landscape. **Compensation:** ¥5,000,000 ~ ¥8,000,000 annually. APPLY FOR THIS POSITION DO YOU NEED MORE INFO? ASK A QUESTION