Founding Engineer - London (up to £170k)

Dex; Greater London; On-site; GBP 120,000 - 180,000; Full time

Job summary

Dex is building an audit operating system for UK and Norwegian markets. You will be a Founding Engineer, owning the agent layer from day one and shaping the system that plans, executes, and checks audit work. Expect to tackle deep ambiguity and define processes from scratch.

You will collaborate with state-authorised auditors to embed ISA standards and domain expertise, building a platform that improves evidence gathering and audit execution with measurable impact.

Qualifications

• Shipped systems you owned end-to-end.
• Built and evaluated LLM systems with strong opinions beyond prompts.
• Able to break down ambiguous processes with experts.
• Willing to be in the office most of the week.

Responsibilities

• Own the agent layer end-to-end for the audit OS.
• Design, build, and iterate the system that plans, executes, and checks work.
• Develop mechanisms for autonomous evidence gathering and processing.
• Decompose complex, ambiguous audit processes into executable tasks.
• Collaborate with state-authorised auditors to embed ISA standards.

Skills

End-to-end ownership

LLM systems

Decomposition of processes

Office presence

Tools

LLM tooling

Job description

The role

This company is building an audit operating system, rethinking statutory audit for UK and Norwegian businesses. They offer a fixed-price, online service, onboarding in minutes, and testing every transaction, not just samples. It's a fundamental shift in a regulated industry, backed by leading investors with significant pre-seed funding.

You will be a Founding Engineer, owning the agent layer of this audit OS from day one. This isn't about picking up tickets; it's about defining the system that plans, executes, and checks audit work. Expect deep ambiguity, problems stated in a single sentence, and no pre-defined roadmap. This role is for someone who wants to build a process from scratch, not just contribute to an existing one.

The work

• Own the agent layer of a new audit operating system, end-to-end.
• Design, build, and iterate on the system that plans, executes, and checks audit work.
• Develop the mechanisms for the agent layer to autonomously improve its evidence gathering and processing.
• Decompose complex, ambiguous audit processes into clear, executable engineering problems.
• Collaborate directly with state-authorised auditors to embed ISA standards and domain expertise into the system.

What You Bring

• You have shipped systems you were personally accountable for, owning them end-to-end.
• You have built and measured LLM systems, forming strong opinions beyond just prompting.
• You can decompose a complex, ambiguous process and iterate on it directly with subject-matter experts.
• You genuinely want to be in the office most of the week.