Skip to main content
Back to all jobs
Architect

Architect

Job listing

London, United Kingdom£70k - £130k + 0.1% - 1% Equity

Systems Engineering at Project A-backed AI startup

Join a Project A-backed startup in London that is rebuilding the internet by replacing static websites with intelligent AI agents. As a Systems Engineer, you will report directly to the CPTO and build the high-performance backend infrastructure—including context engines and retrieval pipelines—that enables websites to adapt in real-time to every visitor. With £3.5M in seed funding and a mission to create a new category of web experiences, this is a unique opportunity for a systems-focused engineer to own critical infrastructure and shape the future of how we interact with the web.

Overview

Role overview

You will architect the core infrastructure for an AI agent platform that replaces static websites with personalized, real-time experiences. Reporting directly to the CPTO, you will own deep backend domains including context engines, retrieval pipelines, and scaling OLAP systems to support an entirely new category of autonomous web interactions.

Company

Architect

Architect

Software5-15 employees

Project A-backed AI startup rebuilding the web with £3.5M in seed funding

Responsibilities

What you will do

  • Design and implement context engine and retrieval pipelines for autonomous AI agents using TypeScript and Temporal.io.
  • Scale the data layer and OLAP infrastructure to handle real-time personalization and high-concurrency traffic on GCP.
  • Collaborate with the CPTO to define the technical roadmap and systems architecture for a service-oriented backend using Postgres and Redis.

Candidate profile

Who this is a fit for

  • Strong backend fundamentals in TypeScript and experience with distributed systems, workflow orchestration (Temporal/Cadence), or complex data pipelines.
  • An obsessive craftsman who cares about maintainable code and "the beautiful piece of wood on the back" while maintaining a fast startup pace.
  • High drive to master new domains like RAG, LLM evals, or reinforcement learning to build higher levels of system autonomy.

What makes it remarkable

Why this role is remarkable

  • Work at the frontier of AI where your systems work directly enables a vision of "living, breathing" web experiences that learn and optimize themselves in real-time.
  • Join an elite, fast-moving team of ~10 people backed by Project A with £3.5M in funding and a direct line of impact to the founding team.
  • Total ownership of complex problem domains in a 5-day-a-week in-office environment designed for high-density collaboration and rapid product iteration.

Jack & Jill

How Jack & Jill work together

Jack
I get to know what you’re great at, then find roles you’d never find yourself.
Jill
I recruit from Jack’s network and make the intro when I spot a great match.

Meet Jack

Thumbnail for Meet Jack

Jack gets to know what you're great at and what you want next, then searches 14 million jobs daily and introduces you directly to hiring managers.

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.

Find a job withJack

Ready to find your next role?

Talk to Jack for 10 minutes and see your first matches.