Co-Founder, CTO, Construction Operations

Marble is a climate tech venture studio. We partner with scientists, engineers, and operators to create companies solving hard climate problems in the world's largest industries.

Our first 15 companies are building transformative products across energy, industry, agriculture, and climate resilience. 100% have been successful in raising follow-on to date. We are looking to partner with exceptional individuals to create our next venture.

The UK’s 885,000 construction micro-businesses deliver £49bn of small construction projects each year. Most run on WhatsApp, spreadsheets, and memory. The unstructured approach costs roughly 20% of each job in scope drift, rework, untracked changes, and delayed compliance.

The industry is also highly wasteful, with 13% of materials never being used, and construction accounting for 61% of the UK’s landfill. We are reliant on this highly fragmented industry to refurbish our buildings to meet performance needs and the targets of the Climate Change Act. However, at current rates, it will take 100+ years to decarbonise the UK’s built environment.

We are building an AI-native workforce of installers to provide high-quality retrofits of buildings. The software will be used to ease administrative burden, reduce project costs, and accelerate business growth. By de-risking installations for both the contractor and the customer, we will enable cost effective delivery across millions of buildings.

As CTO and Co-Founder, you will be the technical half of a two-person founding team. You are a peer to the CEO, a partner, sharing leadership and responsibility. You own the technical vision, the architecture, the hire-and-build plan for the engineering team, and the technical narrative we take to investors and partners.

This is not a "manage the engineers" role. At Pre-Seed, you are writing the production code, making the call on what we build, what we buy, and what we defer.

You will inherit working scaffolding (Ionic Angular mobile app, FastAPI services, agent gateway with LLM SDKs, Supabase data layer, a live React lead-gen site on Cloudflare) and a product roadmap shaped by over 100 installer interviews. You will own the technical strategy that turns that scaffolding into a defensible, AI-native operating system for the trades.

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• Mentorship and guidance at every step of the way

• Hands-on support across technology and market research, landing interviews with experts and customers, techno-economic modelling, roadmap and scale-up strategy, sourcing your future co-founders and advisors, and more

• Access to an unparalleled network across science, industry, talent, investors, mentors, and other climate deeptech founders

• Access to our research insights, knowledge base, and curated resources

• Weekly check-ins, work sessions in our Paris HQ (or remote) and continuous peer learning with other programme participants

We believe that a diverse group of minds is key to solving the climate crisis. We encourage women and people of colour to apply. Studies have shown that under-represented candidates are less likely to apply for an opportunity unless they feel they meet every single qualification. We are committed to building a diverse, inclusive and mission-driven cohort. If you’re excited about the programme but your past experience doesn’t align perfectly with what you read on our website, we encourage you to apply anyways!

For a full list of FAQs, please visit our website.