Software Engineer Fullstack (£75k-£110k + Equity) at throxy

This is a job that Jill, our AI Recruiter, is recruiting for on behalf of one of our customers.

She will pick the best candidates from Jack's network.

The next step is to speak to Jack.

Job Title

Software Engineer Fullstack

Salary

£75k-£110k + Equity

Company Description

throxy is a YC S25 AI startup that has raised $6.2M to build autonomous revenue pipelines that handle outbound sales end-to-end.

Job Description

Join a senior team of three at throxy building AI agents that autonomously handle outbound sales and inbound lead qualification. You will own problems end-to-end, developing fullstack systems with TypeScript and Next.js. This is a high-impact role where your code directly generates revenue for Fortune 500 customers and fast-growing startups.

Location

London, UK

Why this role is remarkable

• Join a YC S25 company at a post-seed stage with $6.2M in funding and proven month-over-month growth.
• Every AI improvement compounds the service's value, allowing you to build on a massive tailwind rather than racing against one.
• Operate with outsized leverage as an early engineer on a tiny, elite team shipping foundational systems for global enterprise clients.
  
  

What You Will Do

• Build and scale autonomous calling infrastructure and AI inbound SDR systems that convert callbacks directly into scheduled meetings.
• Develop intelligence layers that generate post-call insights and prospecting engines using custom scraping and AI qualification pipelines.
• Architect and iterate on a modern stack featuring TypeScript, React, Next.js, SingleStore, OpenSearch, and Trigger.dev.
  
  

The ideal candidate

• Has 3+ years of professional fullstack experience, preferably with a background at high-calibre companies like Stripe, Revolut, or FAANG.
• Possesses strong computer science fundamentals, a degree from a top-tier university, and a track record of shipping projects end-to-end.
• Demonstrates deep proficiency in TypeScript and React, with a strong interest in building with LLMs, RAG systems, or AI agents.
  
  

Who are Jack & Jill?

Ok, I'll go first. I'm Jack, an AI that gets to know you on a quick call, learning what you're great at and what you want from your career. Then I help you land your dream job by finding unmissable opportunities as they come up, supporting you with applications, interview prep, and moral support.

And I'm Jill, an AI Recruiter who talks to companies to understand who they're looking to hire. Then I recruit from Jack's network, making an introduction when I spot an excellent candidate.

How does this work?

• Jack's an AI agent for job searching and career coaching. He works for you.
• Jill is the AI recruiter working for the company. She recruits from Jack's network.
• If it's a match and the company wants to meet you, they'll make the intro. In the meantime, if you'd like, Jack will send you excellent alternatives.
  
  

We never post fake jobs

This isn't a trick. This is an open role that Jill is currently recruiting for from Jack's network.

Sometimes Jill's clients ask her to anonymize their jobs when she advertises them, which means she can't share all the details in the job description.

We appreciate this can make them look a bit suspect, but there isn't much we can do about it.

Give Jack a spin! You could land this role. If not, most people find him incredibly helpful with their job search, and we're giving his services away for free.