Fullstack Product Engineer / React + Node / Onsite (Flatiron NYC)

Fullstack Product Engineer — NYC (On-site, 5 days/week)Comp: $150K–$300K + highly competitive equity Experience: 3–10 years building 0?1 products Visa: Available A fast-growing AI company in NYC (Flatiron) backed by top-tier investors recently raised a $30M Series A and is building end-to-end AI systems for accounting and finance workflows. The team is scaling quickly and is hiring a Fullstack Product Engineer to own major product surfaces and ship real, production-grade features used by customers daily. What You’ll Do

• Own product features end-to-end—from idea ? design ? build ? deploy.
• Architect full-stack systems spanning frontend, backend, and APIs.
• Work closely with users and internal teams to shape product direction.
• Drive high-quality execution in a fast, iterative environment.
• Contribute to engineering culture and mentor teammates.

What We’re Looking For

• Deep experience in at least one full-stack language + strong product sense.
• Background in high-velocity environments (early-stage startup or quant-style engineering team).
• Demonstrated ownership and meaningful impact in past roles.
• Strong tenure (2+ years) and evidence of progression.
• Strong academic foundation (top global university, strong GPA).
• Passionate about solving complex problems in a collaborative, in-person setting.

Bonus Skills

• Product management instincts: user research, iteration, feedback loops.
• Experience with AI/LLM-integrated products.

Why Join

• Backed by world-class ML + fintech investors.
• 10× revenue growth in the past 5 months.
• High ownership from day one; build at the edge of ML + finance.
• Work alongside top engineers, ML researchers, and domain experts—all on-site in NYC.
• High risk, high reward environment with significant equity.

Interview Process

• Initial recruiter screen
• Founder/lead screening
• Coding interview
• Technical deep-dive or live coding
• Onsite (3–4 hours) covering technical, communication, and culture fit
• References

If you're excited to build ambitious AI products and want to own meaningful surface area in a rapidly scaling environment, this role is for you. Posted By: Henry Mills