BuildersAI
Technical Co-Founder/CTO
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Company Description
BuildersAI is a UK-based construction technology company focused on smarter site coordination, available across major app stores. The platform serves as a central knowledge hub for construction sites, combining a unified database with an intuitive AI chat interface to deliver instant access to plans, specifications, and documents. Site teams use BuildersAI to get AI-powered answers to questions about tasks, processes, and site details, reducing delays and confusion. Built-in site management tools create a single source of truth for supervisors and trades, helping projects run more smoothly from day one. Applicants can learn more, book a demo, or start a free trial at https://buildersai.co.uk/.
Where we are today
- Live web and mobile product
- Paying customers
- Around 15,000 organic search impressions every week
- Multiple demo bookings a week already generated through inbound marketing
- A tested outbound demo pipeline that we're confident can easily generate 10 qualified demo bookings per week, with a strong conversion rate
This isn't an idea-stage startup. You'll be joining a company with a working product, real customers and a clear commercial strategy for growth.
The team
You'll be joining a small team where everyone owns a clear area of responsibility.
- CEO: Economics background with experience in sales, marketing and customer acquisition. Responsible for product direction, commercial strategy and growth.
- COO: Corporate background, responsible for operations, structure and helping the business scale professionally.
- Construction Director: On a variety of construction sites every week, ensuring everything we build solves genuine problems faced by site teams.
How we work
- We try to run BuildersAI in the same organised way we want our customers to run their projects.
- GitHub is our development task board.
- Meeting transcripts become shared context so decisions are never lost.
- We make extensive use of AI across both engineering and commercial work, from analysing customer conversations to writing specifications and documentation.
- Everyone owns their area of responsibility and works with a high degree of autonomy.
- Fully remote with flexible working. We care about results, not hours logged.
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The role
You'll own the technical build and delivery of the platform.
- For the first three months, every task will come with a detailed specification, clear acceptance criteria and the reasoning behind why we're building it. We want you spending your time writing excellent software rather than trying to work out product requirements.
- Initially, the focus is on refining and improving the existing product based on customer feedback. At this stage, polishing the product, improving usability and delivering an outstanding customer experience are significantly more valuable than introducing large amounts of new functionality.
- If you'd prefer to work independently, you'll be the sole technical hire during the first three months. If additional engineering capacity becomes necessary, we'll bring in another engineer to work alongside you.
- This is a hands-on role for someone who enjoys solving problems, building products and shipping improvements quickly.
What we're looking for
We're far more interested in capability than years of experience, but ideally you'll have:
- Experience building and shipping production web and mobile applications
- Strong React Native / Expo and TypeScript experience
- Experience with Supabase, PostgreSQL (including Row Level Security), or an equivalent backend stack
- Experience with offline-first or real-time synchronisation (PowerSync or similar)
- Practical experience building AI-powered products using technologies such as RAG, embeddings and LLM APIs
- Strong product instincts and the ability to build genuinely simple software for non-technical users
- The ability to work independently, move quickly and take ownership of delivery
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Technology
- React Native / Expo
- Next.js
- TypeScript
- Supabase
- PostgreSQL
- PowerSync
- AWS Bedrock
- Vercel AI SDK
Location
Fully remote.
We're flexible about how and when you work. We care about the quality of what you deliver rather than the hours you work.
For the right person, the initial three-month sprint can be completed on a part-time basis. Our intention is to move into a full-time salaried CTO role once we've reached our commercial milestones and completed fundraising.
The opportunity
We're looking for someone who wants to become a genuine long-term technical partner in the business.
For the right person, we're offering a meaningful equity stake and the opportunity to help shape the future of BuildersAI from an early stage.
If you'd prefer cash certainty initially, we're also open to a three-month paid retainer instead. The equity and retainer options are separate, and we'll discuss which route makes the most sense during the interview process.
Our next milestone
Our immediate objective is simple: reach 20 paying customers.
From there, we'll make full use of the resources available through our SETsquared Bristol Incubator residency, including experienced mentors, fundraising support, investor introductions and access to one of the UK's strongest startup ecosystems.
SETsquared has consistently been recognised as one of the world's leading university business incubators, and we're fortunate to be part of its Bristol centre. Combined with strong commercial traction, we believe we're in an excellent position to scale the business.
Interview process
- Alignment call with our COO
- Technical interview with our CEO
- Final conversation with the wider team
How to apply
Apply through LinkedIn, or email william@buildersai.co.uk with your CV
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