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