Software Engineer Fullstack (£75k-£110k + Equity) at YC-backed AI-native revenue platform

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

YC-backed AI-native revenue platform with $6.2M seed funding

Job Description

You will build autonomous AI agents that handle the work of outbound sales pipelines, moving beyond simple tools to deliver end-to-end results. As one of the first engineers at this post-seed startup, you will design and ship foundational systems including dialer infrastructure and automated prospecting engines that drive revenue for Fortune 500 customers.

Location

London, UK

Why this role is remarkable

• Join a tiny, high-leverage team of three senior engineers where every line of code directly impacts month-over-month revenue growth and scales the core product.
• Work at the frontier of AI application, building a service where better models compound your work by making the platform faster and harder to compete with.
• Backed by YC S25 and top-tier investors with $6.2M in funding, offering the stability of product-market fit with the high-upside energy of a founding-stage company.
  
  

What You Will Do

• Rebuild core dialer infrastructure from scratch, placing AI agents at the center of the communication loop to handle autonomous interactions.
• Develop AI Inbound SDR systems capable of autonomously converting thousands of monthly callbacks into qualified meetings for global enterprise clients.
• Architect intelligence layers that generate post-call insights and prospecting engines using custom scraping and AI qualification pipelines to find leads.
  
  

The ideal candidate

• Has 3-6+ years of professional fullstack experience, specifically with TypeScript, React, and Next.js, and a computer science degree from a top-tier university.
• Demonstrates a history of shipping end-to-end systems at high-calibre tech companies like Stripe, Revolut, or FAANG, or within high-growth startup environments.
• Possesses builder instincts with experience in AI/LLM implementations such as RAG systems or autonomous agents, and is comfortable owning features from scope to deployment.
  
  

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.

Next steps

Step 1. Visit the job listing.

Step 2. Click 'Talk to Jack', or go straight there: https://www.jackandjill.ai/jobs/software-engineer-fullstack-75k-110k-equity-at-yc-backed-ai-native-revenue-platf-61f5f386-0f03-4a24-b319-7016ebdb4e58?utm_source=linkedin&utm_medium=job_post&utm_campaign=featured_role_61f5f386-0f03-4a24-b319-7016ebdb4e58

Step 3. Talk to Jack so he can understand your experience and ambitions.

Step 4. Jack will make sure Jill (the AI agent working for the company) considers you for this role.

Step 5. If Jill thinks you're a great fit and her client wants to meet you, they will make the introduction.

Step 6. If not, Jack will find you excellent alternatives. All for free.

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.