FullStack Developer - On Site in San Francisco

Position Overview

Join our fast-growing, 10-person startup in San Francisco as a Principal / Senior Full-Stack Engineer (AI Agents). In this high-impact, full-time role, you will help build next-generation AI agents powered by cutting-edge models from OpenAI and Anthropic. You’ll work 100% on-site at our downtown SF office (4th & King) in a collaborative environment that values extreme ownership, rapid iteration, and significant autonomy.

Key Responsibilities

• Design, develop, and maintain full-stack features using TypeScript.
• Build and optimize AI agents using state-of-the-art LLMs.
• Work with GCP (primary) or AWS, leveraging infrastructure-as-code and deployment pipelines.
• Take full ownership of projects from ideation and architecture to implementation and maintenance.
• Develop reusable tools, prompts, and frameworks for rapid agent creation.
• Identify problems proactively, propose solutions, and execute independently.
• Contribute to architectural decisions and uphold engineering best practices.

Required Qualifications

• 10+ years of engineering experience with a strong record of end-to-end project ownership.
• Experience in B2B SaaS environments.
• Proficient in full-stack development with a focus on TypeScript (frontend and backend).
• Cloud platform expertise, primarily in GCP (preferred) or AWS.
• Solid system design, architectural skills, and experience with IaC, CI/CD, and deployment workflows.
• Familiarity with LLMs and a genuine enthusiasm for AI innovation.
• A mindset of extreme ownership, high agency, and comfort with ambiguity.

Preferred Qualifications

• Prior experience with AI agents is a plus.
• Comfort working in a fast-paced, ambiguous startup environment.

Benefits & Perks

• Competitive Salary: Principal: $225k-$275k; Senior/Staff: Flexible based on autonomy and performance.
• Meaningful Equity benchmarked against industry leaders.
• Health, dental, and vision insurance with the basic plan fully covered.
• Commuter benefits including parking and train subsidies.
• Catered meals and office snacks.
• An opportunity to work in a high-impact role within a small, senior team.