Founding Engineer – Full Stack

About the Role Join the founding engineering team of a Y Combinator–backed AI startup building brand intelligence tooling at the intersection of AI research, product, and engineering. This company helps brands understand how large language models perceive and talk about them — and how to shape that narrative. As a Founding Engineer , you'll have outsized ownership and impact, working directly with customers and leadership to ship end-to-end features in a fast-moving environment. What You'll Do Own problems end-to-end — from high-level customer insight through research and infrastructure. Maintain a close feedback loop with customers and the executive team, shipping quickly and iteratively. Help shape the culture, patterns, and practices of a brand-new engineering team. Continuously reinvent best practices for building alongside AI agents as a core part of the development workflow. What We're Looking For Required: 1+ years of experience on an engineering team (2+ preferred); includes at least one stint of 18+ months in a strong engineering environment (scale-up or startup). Proficiency with React, Python, Terraform, and AWS . Comfortable working full-stack — from customer-facing UI all the way down to infrastructure. Experience building agentic systems . Strong product sense and design intuition; able to translate customer needs into shipped features. Startup experience or self-driven personal projects that demonstrate initiative and high agency. US citizen or eligible to work in the US (visa sponsorship available). Nice to Have: Direct experience working with customers. Scientific or AI research background, especially in AI interpretability. Eagerness to adopt and adapt to AI-powered coding tools and emerging engineering workflows. Compensation & Benefits Salary: $150,000 – $250,000 USD annually Early-stage equity Visa sponsorship available Location This is a full-time, on-site role based in San Francisco, CA . Remote work is not available for this position.