Founding Engineer

About this role

Join a seed-funded B2B SaaS startup as a Founding Engineer to build core infrastructure for an AI agents and people-data platform. You'll work directly with the founding team owning critical systems, APIs, and LLM workflows while scaling toward Series A.

What you'll do

• Design and build core infrastructure including APIs, LLM-powered workflows, web scraping systems, and knowledge graph architecture
• Architect production-grade systems handling millions of API requests with focus on performance, cost efficiency, and reliability
• Own projects end-to-end from problem definition through deployment and iteration
• Collaborate with CEO and CTO on technical strategy, roadmap priorities, and architectural decisions
• Contribute across the full stack including documentation, tutorials, and internal tooling
• Stress-test and showcase APIs through experimental builds

What they're looking for

• Full-stack or backend software engineering (2+ years)
• JavaScript and TypeScript proficiency
• Agent orchestration, LLMs, or web scraping experience
• Linux server administration in production environments
• Distributed systems and microservices architecture
• Cloud infrastructure (AWS/GCP)
• Strong computer science fundamentals
• End-to-end product development experience

Benefits

• Competitive salary: $150,000–$220,000 USD annually
• Equity participation as founding team member
• Direct collaboration with CEO and CTO
• Shape technical strategy and long-term architecture
• 5-day on-site work in San Francisco
• Opportunity to build at an early-stage, well-backed startup