Senior Product Engineer - Agentic AI

ZipRecruiter; London; On-site; GBP 60,000 - 100,000; Full time

Job summary

A forward-thinking company based in London is seeking Founding Engineers to join their dynamic team. You will contribute to transforming B2B payments with cutting-edge AI technology, influencing product decisions from UX design to AI architectures. This is an opportunity to shape the future of payments with a dedicated team backed by top-tier VCs.

Qualifications

• Deeply curious and passionate about building user-centric products.
• Ability to work across UX, API design, and AI architectures.
• Desire to influence product decisions and company culture.

Responsibilities

• Shape product decisions and tech choices.
• Work across the stack from UX to AI engineering.
• Drive fast-paced product development.

Skills

Curiosity

Product Development

API Design

AI Architecture

Job description

Job Description

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 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 Founding 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.