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Role description

Senior Product Engineer - Fullstack

Lunos logoLunos
AI-native
TypeFull-time
WorkplaceHybrid
SenioritySenior
LocationNew York, NY
Posted4/14/2026
Engineering

Payments might seem slick for consumers, but $100tn of Global B2B commerce still runs on the manual labor of millions of people in finance teams around the world. It’s been this way forever. Despite software, APIs and new payment methods. That’s because it’s not a payments problem. It’s a communication and negotiation problem. One that computers couldn’t solve. Until now.

Lunos is replacing this with a network of AI agents, starting with accounts receivable. We offer an AI partner that ensures businesses get paid by managing their receivables (what they are owed) 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 top-tier VCs who were early backers of companies like Stripe and Airbnb. 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. 🚀

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Company info

Lunos logo

Lunos

Tame the Wilds of Receivables. An AI agent that works your receivables like your best AR hire. Only scalable.

Lunos is an AI accounts receivable partner, not just a tool. It works alongside your finance team like an always-on colleague, chasing down invoices, handling customer replies, and driving results without the repetitive admin. Receivables work is often reactive, tedious, and people-dependent. Lunos makes that human approach scalable. It connects to your systems and communicates with your customers via email and other channels - completely personalized, and fully in sync with how your business operates. From payment reminders to dispute handling to autopay nudges, Lunos is proactive and responsive in the same thread. It doesn’t just send automated messages. It listens, understands, and acts like a real person would, only faster and more reliably. Lunos gives you more than automation. It gives you time, control, and better cash flow, with fewer write-offs and less chasing.

Private companyPre-seed
Founded2024
HQNew York City, United States
Unlock human wisdom
ThesisTermsPrivacy
Size
16 employees
IndustryTechnology, Information and Internet
Funding
  • Pre-seed · $5M · Sep 30, 2025
Investors
Cherry VenturesGeneral Catalyst

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