Systems Engineering (£70k to £130k + 0.1% to 1% Equity) at Architect

{ “@context”: “http://schema.org”, “@type”: “JobPosting”, “title”: “Systems Engineering (£70k to £130k + 0.1% to 1% Equity) at Architect”, “description”: “

Job Title

Systems Engineering

Salary

£70k-£130k + 0.1% to 1% Equity

Company Description

Architect – Seed-stage AI startup backed by Project A

Job Description

Architect is transforming the web from static pages into intelligent, real-time AI agents that adapt instantly to every visitor. As a Systems Engineer, you will own the deep backend infrastructure—from context engines and retrieval pipelines to scaling OLAP data layers—shaping how the internet's next generation of personalized experiences is built and delivered.

Location

London, UK

Why this role is remarkable

  • Join an elite team of 10 in a London HQ, working directly with founders and the CPTO to define a brand-new category of living, breathing web experiences.
  • Benefit from strong financial backing with £3.5M raised from top-tier investors like Project A to disrupt a massive global market.
  • Ownership is absolute here; you aren't just shipping features but architecting the core systems that enable autonomous AI agents to build websites on-the-fly.

What you will do

  • Design and implement high-performance retrieval systems and context engines to power real-time AI agent decision-making.
  • Architect and scale service-oriented backend systems using TypeScript, Postgres, and Temporal.io to handle complex, long-running workflows.
  • Build robust integration layers and OLAP scaling solutions that allow the platform to learn and optimize itself based on live visitor data.

The ideal candidate

  • Deep technical background in systems engineering, distributed systems, or data pipelines with professional mastery of TypeScript backend environments.
  • Experience or a strong interest in AI infrastructure, specifically RAG, LLM evaluations, or workflow orchestration tools like Temporal and Cadence.
  • A founding mentality that values craftsmanship—the "beautiful piece of wood on the back"—and thrives in a fast-paced, 5-day-per-week in-office collaborative culture.

#J-18808-Ljbffr”, “datePosted”: “2026-04-26”, “hiringOrganization”: { “@type”: “Organization”, “name”: “Jack & Jill”, “sameAs”: “https://uk.whatjobs.com/pub_api__cpl__413446677__4861?utm_campaign=publisher&utm_medium=api&utm_source=4861&geoID=33” }, “jobLocation”: { “@type”: “Place”, “address”: { “@type”: “PostalAddress”, “addressLocality”: “London” } } }
Company: Jack & Jill
Apply for the Systems Engineering (£70k to £130k + 0.1% to 1% Equity) at Architect
Location: London
Job Description:

Job Title

Systems Engineering

Salary

£70k-£130k + 0.1% to 1% Equity

Company Description

Architect – Seed-stage AI startup backed by Project A

Job Description

Architect is transforming the web from static pages into intelligent, real-time AI agents that adapt instantly to every visitor. As a Systems Engineer, you will own the deep backend infrastructure—from context engines and retrieval pipelines to scaling OLAP data layers—shaping how the internet’s next generation of personalized experiences is built and delivered.

Location

London, UK

Why this role is remarkable

  • Join an elite team of 10 in a London HQ, working directly with founders and the CPTO to define a brand-new category of living, breathing web experiences.
  • Benefit from strong financial backing with £3.5M raised from top-tier investors like Project A to disrupt a massive global market.
  • Ownership is absolute here; you aren’t just shipping features but architecting the core systems that enable autonomous AI agents to build websites on-the-fly.

What you will do

  • Design and implement high-performance retrieval systems and context engines to power real-time AI agent decision-making.
  • Architect and scale service-oriented backend systems using TypeScript, Postgres, and Temporal.io to handle complex, long-running workflows.
  • Build robust integration layers and OLAP scaling solutions that allow the platform to learn and optimize itself based on live visitor data.

The ideal candidate

  • Deep technical background in systems engineering, distributed systems, or data pipelines with professional mastery of TypeScript backend environments.
  • Experience or a strong interest in AI infrastructure, specifically RAG, LLM evaluations, or workflow orchestration tools like Temporal and Cadence.
  • A founding mentality that values craftsmanship—the “beautiful piece of wood on the back”—and thrives in a fast-paced, 5-day-per-week in-office collaborative culture.

#J-18808-Ljbffr…

Posted: April 26th, 2026