Most Loved Workplace® Certified JobFounding Software Engineer, Construction Operations
Most Loved Workplace® Certified JobAbout the Role
At Marble, a Most Loved Workplace® certified employer in the Media/Publishing space, Turning moments into legacies through creatively optimistic brand experiences.
About Marble 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 13 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 operating system for independent installers to ease administrative burden, reduce project costs, and accelerate business growth. Our technology empowers tradespeople to grow their business, gain professional independence and administrative efficiency. By de-risking installations for both the contractor and the customer, we will enable the UK to cost effectively scale delivery across millions of buildings. About the Role You will be the primary driver of product delivery and implementation of the technical architecture . You will report to the CEO and be the technical voice in product, hiring, and strategy decisions. This is not a role where someone hands you a detailed step by step, specification and you implement it. You will work directly with installers and the team to turn their needs into working software solutions. Core Responsibilities Architecture ownership: Own the full technical stack including: Ionic Angular / React, FastAPI services, Supabase (Postgres, Auth, Storage), Cloudflare Workers, and LLM integrations. Shipping software: Write, test, and deploy code. This is a hands on product role, not a management role. At Pre-Seed, the founding engineer is the engineering team. AI/LLM integration: Ship LLM powered capabilities to augment installer workflows from surveying, scoping, quoting and documenting compliance. Train CNNs to recognise features. Product collaboration: Work directly with installers and our customer success lead, hear what they need, and make the decisions that turn those needs into working software. Understand the trade well enough to make good judgment calls when the spec is ambiguous, and to push back when a requested feature would not actually solve the underlying problem. Technical decision-making: Work with the team to choose tools, libraries, and patterns. Decide what to build, what to buy, and what to defer. Advise on technical hiring as the team grows. Requirements You are a strong fit if you recognise yourself in most of the following: Skills Software engineering fundamentals: Solid CS foundations including data structures, algorithms, systems design, testing, architecture. Full-stack web and mobile: You ship production apps from front end to back end. Experience with component-based frameworks and mobile apps real users depend on. Python backend: Comfortable building APIs, data pipelines, and service integrations in Python. Familiarity with FastAPI, Django, or Flask is useful but not essential, what matters is that you can design clean, testable services. AI/LLM agentic workflows: You've built production AI processes including agent first workflows, RAG, structured output parsing and understand the gap between a demo and a production-level system. Cloud infrastructure: You can deploy, monitor, and maintain apps end-to-end on modern cloud platforms (Supabase, Cloudflare, AWS, or similar). Data modelling: You design schemas that evolve with the product without quarterly rewrites. Behaviours Product over features: You measure output in customer outcomes, not code shipped. You'd rather spend a morning with an installer than refactoring if that's where the learning is. Builder mentality: Ship imperfect on Thursday over perfect next month but you track technical debt, communicate it, and know when it's dangerous. At Pre-Seed, learning speed is the primary engineering metric. Full-picture comfort: No hard lines between front end, back end, infra, and product. You go where the work is. Ownership: You own the CI pipeline, the migration, the failing test, and the customer bug. There's no one to delegate to during the Pre-Seed stage. Clear communication: You explain technical trade-offs in plain language and flag risks early. Bonus Points You have built multi-tenant SaaS applications. You have worked with Ionic, Angular, or the Capacitor/Cordova ecosystem. You have designed AI workflows with human-in-the-loop review gates. You have worked with CNN’s and Computer Vision. You have built or contributed to developer tools, internal platforms, or infrastructure automation. You have a strong appreciation for design and UX. You understand UK construction compliance (MCS, Part P, Building Regulations). What we Offer As a founding technical lead, you will partner 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. We offer (among other things): Contract: This role can begin as fractional (2–3 days per week) with a clear path to full-time, or start full-time from day one. We will discuss what works for both sides. Based in, or near Bristol or Exeter with regular co-located working in the South West. Salary: Competitive for Pre-Seed stage, discussed openly during the process. Equity: Significant early-stage equity. This is a founding-team role and the equity reflects that. Autonomy: Real ownership of the tech stack and product direction. You will shape Marble, not just work for it. Mission: Direct, measurable impact on how independent tradespeople run their businesses and contribute to the UK’s net-zero transition. Tools: Modern development and AI tools, a founder who has built and exited twice before, and a product roadmap shaped by over 100 installer interviews.
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View Original PostingWhy This Is a Most Loved Workplace® Certified Job
Systemic Collaboration
they feel genuinely connected to where we’re going and why it matters. Leadership is open and honest—sharing updates, listening to input, and making sure everyone’s part of the journey. People can see the impact of their work and know their growth really matters. We involve the team in both the big-picture stuff and the day-to-day, so there’s a real sense of ownership. We celebrate wins, learn from the tough moments, and move forward together—creating a shared energy and belief in what we’re building.
Positive Vision for the Future
we bring them in right from the start. We hire people who not only have the right skills but also genuinely click with our culture and what we stand for. It’s about finding the right fit, not just filling a role. From day one—and in the day-to-day—we live our values in how we work, talk, and support each other. We check in often, celebrate wins big and small, and lead by example. It all adds up to a workplace where people feel connected, included, and proud to be part of the team.
Alignment of Values
leading with honesty, openness, and a genuine commitment to our culture. They’re approachable and listen carefully, showing respect for all ideas and perspectives. By consistently demonstrating integrity and putting people first, the CEO sets the tone for how we work together every day. They celebrate successes, own up to challenges, and encourage continuous learning. Through regular communication and by actively seeking feedback, the CEO ensures that our values aren’t just words—they’re lived at the highest level and inspire everyone across Marble.
Respect
creating a culture where everyone feels safe to speak up and be themselves. We check in regularly, listen actively, and genuinely care about what our people have to say. Whether it’s through team catch-ups, feedback tools, or just honest conversations, everyone has a voice. Good ideas can come from anywhere, and we make sure they’re heard and appreciated. It’s not just about what you do, but how you show up—and we celebrate the effort as much as the outcome.
Killer Outcomes
embracing a flexible, down-to-earth culture where everyone’s ideas and opinions are welcomed. We keep things open and honest—whether it’s in team catch-ups or company-wide meetings, the focus is always on solutions, not problems. No matter where people are working from, we stay connected through digital tools that make real-time collaboration easy. Leaders lead by example, always open to feedback and new thinking. And across the board, the team naturally turns to each other for support, input, and fresh ideas. It’s this everyday teamwork that really keeps us moving forward together.
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