Senior Product Engineer [Backend] (£80k-£100k + Equity) at Userled.io

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: Senior Product Engineer [Backend]

Salary: £80k-£100k + Equity

Company Description: Userled.io - VC-backed AI marketing startup backed by LocalGlobe

Job Description:
Join a high-growth startup as a core engineer building the future of Generative Marketing. You will own product areas end-to-end in a PM-free environment, designing secure backend systems for a platform used by Stripe and Canva. This is a high-impact role where you'll solve complex architectural challenges while directly influencing product strategy.

Location: London, UK

Why this role is remarkable:

• Exceptional autonomy in a PM-free culture where engineers talk directly to customers and own the entire product roadmap from first principles.

• Backed by top-tier investors including LocalGlobe and the founders of Incident.io and Maze, with a client list featuring Stripe and Datadog.

• High-density talent environment with a team from backgrounds like Thought Machine and PlayStation, offering significant equity in an early-stage trajectory.

What you will do:

• Design and implement scalable backend architectures using Golang and AWS to support hyper-personalized marketing campaigns at scale.

• Lead the development of high-performance REST APIs for both internal services and public-facing consumer applications.

• Collaborate across the stack (Go/TS) to make strategic technical decisions that directly resolve complex B2B buyer engagement challenges.

The ideal candidate:

• Strong technical depth in typed languages such as Go, Java, Rust, or C#, with a focus on building highly concurrent, secure systems.

• Proven experience with modern cloud architectures (AWS/GCP) and data technologies like Kafka, Redis, and BigQuery.

• A product-minded engineer who thrives in ambiguity and enjoys taking full ownership of features from customer discovery to production.

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 our website.
Step 2. Click 'Talk to Jack'.
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."