Founding Full Stack Engineer

About this role

Join an AI-powered sales automation startup as its first Founding Engineer, working alongside the CTO to build self-improving conversational agents that conduct product demos 24/7. You'll own full-stack development across LLM orchestration, embeddable UI, customer platforms, and infrastructure while helping establish the technical foundation for rapid growth.

What you'll do

• Design and build LLM-based conversational agents with orchestration, tool use, and conversation flow management
• Develop embeddable, responsive frontend widgets in React that adapt in real-time to user interactions
• Build backend services and APIs in Python for agent configuration, conversation management, and performance analytics
• Create evaluation pipelines and automated tests to measure agent quality and enable self-improvement
• Design deployment and versioning infrastructure supporting feature flags, preview environments, and safe rollouts
• Debug production issues, trace quality regressions, and implement observability and CI/CD workflows

What they're looking for

• LLM orchestration and prompt engineering
• Python backend development and cloud deployment (AWS/GCP, Docker)
• React and interactive UI development
• Voice integration (STT/TTS) or browser automation
• Evaluation pipelines and CI/CD workflows
• Full-stack end-to-end feature delivery
• Agent deployment and versioning systems
• Product thinking and rapid prototyping

Benefits

• Salary: $180,000–$230,000 USD annually
• Early-stage equity as a founding engineer
• Fully on-site in San Francisco, five days per week
• Work with high-caliber early-stage team alongside CTO
• Opportunity to shape technical culture from the ground up
• Exposure to rapidly growing B2B SaaS with 3x month-over-month growth