Founding-Stage Senior Engineer — CTO Path

Dex; Greater London; On-site; GBP 120,000 - 160,000; Full time

Job summary

Dex is recruiting for a hands-on engineering anchor role within a pre-seed company building AI risk intelligence for multimodal tender packs. You will own core probabilistic risk models, Monte Carlo simulations, and full-stack software deployed to live commercial bids, reporting directly to senior leadership with opportunities toward CTO as the team scales.

You will collaborate with a founding CTO and AI PhD, taking end-to-end ownership without waiting for a playbook, and shaping scalable

Qualifications

• Deep full-stack Python experience with a track record of deploying LLM-powered features and data pipelines to production.
• Working background in probabilistic modelling, Monte Carlo simulation, or representation learning over unstructured data.
• Demonstrated early-stage startup experience, comfortable taking total end-to-end architecture ownership without waiting for a playbook.
• Strong, clear communication skills with the confidence to interface directly with enterprise customers and investors.

Responsibilities

• Build multimodal representation pipelines that extract and structure signal from complex tender packs, including technical drawings, schedules, and contractual terms.
• Develop probabilistic risk models and Monte Carlo simulations calibrated against historical commercial project data.
• Own the end-to-end full-stack architecture in Python, from data ingestion and cloud infrastructure to the customer-facing interface.
• Drive systems from feasibility testing on public datasets to live back-testing and deployments on active contractor bids.
• Engage directly with commercial design partners to translate complex risk assessment workflows into robust production software.

Skills

Full-stack Python

LLM-powered features

Data pipelines

Probabilistic modelling

Monte Carlo simulation

Startup experience

Communication with clients/investors

Tools

Python

AWS

Job description

Dex is recruiting for a hands-on engineering anchor role within a pre-seed company building AI risk intelligence for multimodal tender packs. You will own core probabilistic risk models, Monte Carlo simulations, and full-stack software deployed to live commercial bids, reporting directly to senior leadership with opportunities toward CTO as the team scales.

You will collaborate with a founding CTO and AI PhD, taking end-to-end ownership without waiting for a playbook, and shaping scalable