Senior Product Engineer (£80,000 – £100,000 + Equity) at Userled

Company: Jack & Jill
Apply for the Senior Product Engineer (£80,000 – £100,000 + Equity) at Userled
Location: London
Job Description:

Job Title

Senior Product Engineer

Salary

£80,000 – £100,000 + Equity

Company Description

Userled.io is an early‑stage London startup building a Generative Marketing platform that revolutionizes how B2B teams engage buyers through hyper‑personalized campaigns. Operating from a Shoreditch tech hub, Userled.io enables businesses to navigate a cookie‑less future by deploying swift, high‑impact engagement strategies that drive capital‑efficient growth at scale.

Location

London, UK

Job Description

As a Senior Product Engineer, you will join a core team with a culture of total ownership, making technical and strategic roadmap decisions without PMs. You will design scalable architectures using Golang and TypeScript, building world‑class user experiences on AWS. Your work will directly enable customers to deploy sophisticated, automated marketing strategies.

Why this role is remarkable

  • Work in a high‑autonomy environment where engineers act as product owners, making all first‑principles decisions on feature planning, technical debt, and architectural direction.
  • Join an early‑stage tech company on a rapid trajectory, tackling the massive shift toward Generative Marketing as third‑party cookies are deprecated by major browsers.
  • Enjoy a premium employee experience including a Shoreditch office with a private gym, annual team off‑sites to locations like Corfu, and high‑spec Apple hardware.

What You Will Do

  • Take full ownership of key product areas, contributing across the entire stack in Golang, TypeScript, and React to deliver beautifully crafted, world‑class features.
  • Design and implement highly concurrent backend architectures and robust REST API contracts to support rapid scaling for both internal and public consumers.
  • Collaborate directly with customers to identify pain points and lead the architectural design of new features that solve complex B2B growth challenges.

The ideal candidate

  • Has extensive experience designing secure, message‑driven backend systems and highly concurrent architectures using modern cloud infrastructure like AWS or GCP.
  • Demonstrates full‑stack proficiency, particularly with Golang and TypeScript, and possesses a strong natural appreciation for what makes a high‑quality product look and feel right.
  • Exhibits excellent communication skills, including the ability to write long‑form technical documentation and represent engineering values both internally and to the wider community.

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Posted: July 14th, 2026