Product Engineer (up to £150k)

Dex; Greater London; On-site; GBP 90,000 - 120,000; Full time

Job summary

Dex is partnering with a London startup building autonomous AI agents to manage creator marketing for household-name brands. The role requires shipping production systems end-to-end with a focus on TypeScript, NestJS, Next.js, and PostgreSQL, and involves end-to-end ownership in a fast-growing startup environment.

The successful candidate will architect long-running workflows, scale discovery pipelines, and ship features across TS, Go, and PostgreSQL while operating in a high-velocity London

Qualifications

• Shipping production systems end to end, with full-stack fluency in TypeScript and PostgreSQL.
• Able to translate vague business problems into production UX without a dedicated product manager.
• Proven track record of owning entire systems at a fast-growing startup.
• In-office in London five days a week.

Responsibilities

• Architect long-running agent workflows that maintain memory, state, and automated recovery across months of unattended creator interactions.
• Build high-throughput negotiation and budgeting engines that commit real brand capital autonomously and securely.
• Design automated feedback loops that feed clicks, replies, and attributed sales directly back into the system to measurably improve agent behavior.
• Scale creator discovery and scoring pipelines that run across internet-scale data while managing upstream model rate limits.
• Ship end-to-end features across TypeScript, Go, and PostgreSQL, making autonomous calls on architecture, scope, and user experience.

Skills

TypeScript

NestJS

Next.js

PostgreSQL

Tools

Go

Job description

This role is with one of Dex's trusted partner companies. We work closely with their teams to truly understand their culture, goals, and what they're looking for, so we can match you with the right opportunity and give you context about the role before you commit to a process.

The role

Most creator marketing still runs on armies of agency staff sending manual emails and spreadsheets. Backed by top European seed funds, this London startup is replacing that labor with autonomous AI agents that discover, brief, negotiate with, and reward tens of thousands of creators on behalf of household-name brands. Because the business is paid on performance, the software directly generates the revenue.

The work

• Architect long-running agent workflows that maintain memory, state, and automated recovery across months of unattended creator interactions.
• Build high-throughput negotiation and budgeting engines that commit real brand capital autonomously and securely.
• Design automated feedback loops that feed clicks, replies, and attributed sales directly back into the system to measurably improve agent behavior.
• Scale creator discovery and scoring pipelines that run across internet-scale data while managing upstream model rate limits.
• Ship end-to-end features across TypeScript, Go, and PostgreSQL, making autonomous calls on architecture, scope, and user experience.

What You Bring

• 3 to 8 years of experience shipping production systems end to end, with deep full-stack fluency in TypeScript (ideally NestJS and Next.js) and PostgreSQL.
• Demonstrated ability to take vague business problems from initial concept to production UX without a product manager scoping tickets for you.
• Track record of owning entire systems rather than narrow slices of a large platform, ideally as an early engineer at a fast-growing startup.
• In-office in London five days a week, ready for the intensity and pace of an early-stage company.

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