Job Opportunities API

ABOUT MARBLE Marble https://marble.studio 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 14 companies https://marble.studio/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. EMPOWERING THE TRADES 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. ABOUT THE ROLE 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. Core Responsibilities: - Technical vision and architecture: Own the end-to-end stack and the multi-year technical strategy, data modelling, and infrastructure. - Shipping software: Write, review, and deploy code. - AI strategy: Own the agentic architecture (RAG, structured output, human-in-the-loop gates). Train, evaluate, and deploy models. - Engineering hiring and team building: Build the engineering function. Define the hiring bar, write the JDs, run technical interviews, and set the engineering culture. - Technical fundraising and storytelling: Own the technical narrative in investor conversations, due diligence calls, and partner meetings. - Defensibility: Identify what is protectable, what stays a trade secret, and what is published. As CTO and Co-Founder, you will partner directly with the current Founder in Residence, who has been developing this project as CEO over the last 12 months. The founder has 20+ years of product development experience in the construction industry, ML, and Computer Vision. Most recently, he was responsible for an AI-powered quality assurance system used by automotive OEMs, and before that, built and scaled a robotic tool and installer operating system that delivered over 5,000 installs with zero compliance failures. REQUIREMENTS You are a strong fit if you recognise yourself in most of the following: SKILLS - Software engineering across the stack: You have shipped multi-tenant SaaS and production systems end to end. Solid CS foundations, including data structures, systems design, distributed systems, t