Full Stack AI Engineer (LLM Application)

소개

Claythis is a Bay Area–based GenAI startup building the next generation of 3D and AI creation tools. Our mission is to make complex creative production — from 3D characters to interactive companions — as effortless as typing a prompt. We have built one of the most advanced pipelines for automatic 3D generation and animation, collaborating with leading game studios and creators. Now, we are expanding into AI companions — human-like digital entities that can talk, feel, and evolve. Join a small, world-class team backed by top investors and founder from Silicon Valley and Seoul. You will work directly with the founder and shape both product and infrastructure from day one.

주요업무

You’ll be the core engineer developing our AI chat companion platform — an intelligent, emotional, and multimodal experience combining LLMs, memory, and real-time 3D rendering. • Build and scale full-stack features for AI companion apps (web and mobile) • Design and integrate conversational AI, persona systems, and emotion engines • Develop APIs and infrastructure to connect LLM logic, audio and 3D assets • Implement user profiles, persistent memory, and dialogue histories • Integrate with LLM and multimodal APIs (OpenAI, Claude, Gemini, ElevenLabs, etc.) • Optimize system performance and latency for real-time interactions • Collaborate with product, design, and research teams on rapid prototyping

자격요건

• 3+ years experience in full-stack development (Node.js / Python + React / Next.js) • Experience building mobile apps using React Native or Flutter • Strong understanding of backend architecture and database design (PostgreSQL, MongoDB, etc.) • Hands-on experience with cloud infrastructure (AWS, GCP, or similar) • Familiarity with real-time communication (WebSocket, REST, GraphQL) • Experience integrating LLMs or GenAI APIs into production environments • Curiosity about human-AI interaction, emotional modeling, and virtual companions • A startup mindset—ready to learn fast, fail fast, and iterate • Flexibility to work non-traditional hours and thrive in a fast-paced, ambiguous environment • You must have valid work authorization to work in the United States or Korea (e.g. citizenship or permanent residency)

우대사항

• Experience with Kubernetes, Redis, or message queues (Kafka, RabbitMQ, etc.) • Familiarity with 3D rendering pipelines (Unity, Three.js, Unreal) • Knowledge of speech synthesis, emotion detection, or AI memory systems • Prior startup or founding-engineer experience • Korean / English bilingual communication

혜택 및 복지

• Full ownership — influence both core AI logic and user experience • Early impact — join at a pivotal time, right after our successful 3D platform launch • Global collaboration — Bay Area × Seoul × AI creators worldwide • Competitive equity — early-stage upside in a fast-growing GenAI company