Founding Full Stack Engineer NYC

NOVA Client | YC-backed AI SaaS Startup Location: Remote from the EU | Relocation to New York available Contract type: Full-time | Equity + Visa sponsorship At NOVA, we are managing a key position for one of our clients: a Y Combinator–backed AI startup based in New York that is transforming how SaaS companies deliver product demos. Their product enables instant, hyper-personalized demos in any language—without the need for a human sales rep. The AI agent learns how any software works, joins live video calls with prospects, and, through a real browser, navigates, explains, and interacts with the product in real time. This is a complex and high-impact problem, with future applications in onboarding, support, enablement, and automation. They are building something that was not technically possible just a few months ago. The Role We're looking for a Founding Full Stack Engineer—a technically exceptional candidate with outstanding academic background, experience in top-tier companies, and a passion for building product from scratch. You will work closely with the founding team (previously at MIT, IBM Research, BCG Gamma, and AI startups), with full ownership over your work and direct impact on the product and company. Target start date: January 2026 (flexible and negotiable) Responsibilities Build end-to-end features, from frontend components to backend services Design intuitive, responsive interfaces using React Develop high-performance APIs using Python and FastAPI Work on LLM-based workflows, prompt engineering, and AI integrations Deploy, monitor, and maintain production code in AWS Take technical decisions and own what you build Iterate quickly based on real user feedback Requirements Proven experience as a Full Stack Engineer Strong proficiency in React, JavaScript/TypeScript, and Next.js Solid experience in Python, ideally using FastAPI Familiarity with PostgreSQL and async patterns (Redis or Supabase is a plus) Comfort with cloud infrastructure (AWS/GCP/Azure), CI/CD pipelines, and DevOps basics A product mindset: you care as much about user experience as you do about clean code Nice to Have Experience working with LLMs and AI-powered features Knowledge of browser automation / headless browser tools Strong eye for UI/UX Experience in early-stage startups or 0-to-1 product development Strong academic performance and background in high-bar technical environments What They Offer Meaningful equity from day one A high-impact, high-ownership role with full visibility Relocation to New York, with full visa sponsorship and legal support A team culture built around technical talent, autonomy, and innovation The opportunity to build and scale a product from its earliest stage