Senior Product Engineer - AI fintech startup

Payments might seem slick for consumers, but businesses still trade with each other manually. Every year, millions of people work to exchange documents, emails and phone calls, and send checks and bank transfers worth tens of trillions of dollars.

Lunos is transforming this sleepy world of B2B payments, starting with an AI partner that ensures businesses get paid by managing their receivables just like a human would. Well, how they would if they worked on it 24/7, never forgot anything and read every message ever sent to them.

We’re a small team with big ambitions, backed by General Catalyst & Cherry Ventures who were early backers of companies like Stripe and Airbnb. We recently raised $5M in our pre-seed round.

We’re building in a modern stack (TypeScript, Next.js, Vercel, Supabase/Postgres, Tailwind), blending powerful agentic AI architectures, curated LLM pipelines, quantitative methods and robust SaaS foundations.

We’re looking for Senior Product Engineers who:

• Are deeply curious and passionate about building products users truly love


• Get frustrated when things don’t move fast enough


• Want their voice to shape product decisions, tech choices, and company culture


• Enjoy the freedom and challenge of working across the stack, from intuitive UX and robust API design to AI architectures and prompt engineering


• Believe AI is fundamentally reshaping the world - and want to be part of it

Sound like your kind of adventure?

Let’s talk. 🚀

Salary: $150,000-$220,000 + Equity + Company Performance Bonus (~10%)

Featured benefits

Medical insurance, 401(k), Vision insurance, Dental insurance

• Authorized to work in the United States

• No need for visa sponsorship