Full Stack AI Engineer | Onsite in San Francisco | Local Candidates Only, 5

Experteer Overview As a hands-on Full Stack AI Engineer, you will build and launch AI-native products from scratch, shaping the technical foundation of a fast-moving startup. You’ll work closely with founders to turn ideas into production-ready applications across frontend, backend, infrastructure, and AI systems. You’ll own end-to-end delivery in a high-impact environment, balancing speed with quality while iterating on product ideas. This onsite role puts you at the heart of a San Francisco-based team focused on ambitious, practical AI solutions. Compensation / Benefits * Build, test, launch, and improve full-stack products from zero to one * Develop frontend apps using React, Next.js, or similar * Create backend services, APIs, databases, and integrations * Implement AI-powered features with large language models and multimodal models * Develop AI agents capable of tool use, workflows, and external system interactions * Develop retrieval-augmented generation, embeddings, vector search, and knowledge systems * Integrate voice AI, speech-to-text, text-to-speech, and real-time conversations * Implement model routing, tool calls, and human approval workflows * Build evaluation, monitoring, and testing for AI performance * Improve speed, reliability, scalability, security, and AI inference costs * Collaborate with founders, users, and product stakeholders * Contribute to product, architecture, and technology decisions Tasks * 4+ years of professional software engineering experience * Proven experience launching a product from zero to one * Strong frontend and backend development experience * Experience at an early-stage startup * Strong skills in TypeScript, JavaScript, React, Next.js * Backend experience with Node.js, Python, FastAPI, Go, or similar * Experience with PostgreSQL, APIs, cloud infrastructure, and production deployments * Hands-on experience integrating large language models into production apps * Experience with AI agents, RAG, tool calling, embeddings, or multimodal AI * Strong product judgment and ability to work with limited direction * Ability to move quickly while maintaining high engineering standards Key requirements *

search, and knowledge systems * Integrate voice AI, speech-to-text, text-to-speech, and real-time conversations * Implement model routing, tool calls, and human approval workflows * Build evaluation, monitoring, and testing for AI performance * Improve speed, reliability, scalability, security, and AI inference costs * Collaborate with founders, users, and product stakeholders * Contribute to product, architecture, and technology decisions Tasks * 4+ years of professional software engineering experience * Proven experience launching a product from zero to one * Strong frontend and backend development experience * Experience at an early-stage startup * Strong skills in TypeScript, JavaScript, React, Next.js * Backend experience with Node.js, Python, FastAPI, Go, or similar * Experience with PostgreSQL, APIs, cloud infrastructure, and production deployments * Hands-on experience integrating large language models into production apps * Experience with AI agents, RAG, tool calling, aa Integrate or multimodal AI * Strong product judgment and ability to work with limited direction * Ability to move quickly while maintaining high engineering standards Key requirements *