Founding Engineer (up to £120k)

Dex; Greater London; On-site; GBP 70,000 - 110,000; Full time

Benefits offered by this job

Equity stake (0.5–1%)

Job summary

Dex in London is building multimodal AI to convert on-site notes into regulation-compliant risk reports. You will be the first engineering hire, owning foundational architecture, scalability, reliability, and core AI systems alongside the technical co-founder.

This role is hands-on, heavily ownership-driven, with direct interaction with field assessors and a clear path toward Head of Engineering or CTO as the team grows. Equity is offered.

Qualifications

• 2 to 4+ years of software engineering experience shipping end-to-end production systems.
• Systems-first architectural thinker with strong code quality control.
• Hands-on experience with AI coding agents and LLM-based applications.
• Product-minded, owner mindset, and bias for shipping.

Responsibilities

• Own architecture, scalability, reliability, and security of the stack across web, mobile, and backend services.
• Design and refine the multimodal AI pipeline that processes on-site audio, images, and notes into structured, cited technical reports.
• Orchestrate multiple AI coding agents across parallel worktrees, maintaining architectural integrity and high code quality at velocity.
• Work directly with safety assessors to evaluate failure modes and ship immediate product improvements.
• Set the baseline for engineering culture, deployment pipelines, and early technical hiring as the company scales.

Skills

Software engineering

AI systems

Production systems

Systems architecture

Tools

AI coding agents

Job description

Physical compliance and safety documentation is notoriously slow and manual. This well-funded London startup uses multimodal AI to convert on-site voice notes, photos, and field notes into regulation-compliant risk reports in each client’s custom template, reducing writing time by over 60%. Founded by operators from top-tier enterprise data and AI scale-ups, customer demand is already outpacing what the founding team can build alone.

You will be the first engineering hire, working alongside the technical co-founder to take full ownership of foundational architecture, scalability, reliability, and core AI systems. This is not a ticket-taking implementation job or an isolated research sandbox; you will run parallel agentic worktrees, talk directly to field assessors, review every line that goes live, and set the engineering standard. The trajectory leads directly to Head of Engineering or CTO as the team grows, backed by 0.5 to 1% equity.

The work

• Own the architecture, scalability, reliability, and security of the entire stack across web, mobile, and backend services.
• Design and refine the multimodal AI pipeline that processes on-site audio, images, and notes into structured, cited technical reports.
• Orchestrate multiple AI coding agents across parallel worktrees, maintaining strict architectural integrity and high code quality at high velocity.
• Work directly with active safety assessors to evaluate failure modes, understand physical inspection workflows, and ship immediate product improvements.
• Set the baseline for engineering culture, deployment pipelines, and early technical hiring as the company scales.

What You Bring

• 2 to 4+ years of software engineering experience shipping end‑to‑end production systems that real customers rely on, ideally within early‑stage startups.
• Systems‑first architectural thinker who maintains total comprehension and quality control over code, including code written by autonomous agents.
• Daily, active workflow utilizing AI coding agents, paired with hands‑on experience or genuine conviction in building user‑facing LLM applications.
• Product‑minded and pragmatic: you prioritize customer impact and shipping speed over theoretical purity, and you take ownership without waiting for a brief.

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