For founders with an idea, a prototype or a vibe-coded MVP
You have proved the idea with Lovable, Bolt, Cursor or a slide deck. Now it needs to be secure, scalable and ready for paying users, and you need someone senior to tell you what you do not know yet. That is what we do.
Will it survive your first thousand users, a security question from an investor, or a customer's procurement team?
Data protection, payments, app stores, accessibility, health data rules. The things that sink launches are rarely the features.
You needed a partner who questions the plan, keeps scope tight and cares whether the business works.
How it works
STEP 1 · [£PRICE] fixed fee
We test your prototype the way real users and attackers would, review the code, data and compliance position, and give you a plain-English report with a costed plan.
STEP 2
A senior product and engineering team takes it from prototype to something you can sell, keeping what works and rebuilding what will not scale.
STEP 3
Ongoing product and tech leadership, plus help with grant applications, fundraising and R&D tax claims.
| Criteria | Freelancer | Typical agency | FatFish Ventures |
|---|---|---|---|
| Senior product and technical judgement | Sometimes | Partly | Yes |
| Tells you what not to build | Rarely | Rarely | Yes |
| Production-grade security and compliance | Sometimes | Yes | Yes |
| Help with grants, fundraising and R&D tax | No | No | Yes |
| Still there after launch | Sometimes | On a new contract | Yes |
Track record
A partnership of Cheshire GP practices needed a public site for private care that still felt like the surgery patients already trust. We built the site and embedded Cliniko booking, so people can arrange a free chat or consultation without leaving the page.
Welldoing’s directory of therapists and counsellors had outgrown its platform. We rebuilt it in phases: clearer requirements, a backend that can take more practitioners and clients, and faster search, match and booking.
Animor needed a pet-owner community on web and mobile, with insurance treated as part of the product rather than a page added later. We built the platform from the ground up, including the journeys, consent and data shape a cover product needs.
FatFish understood what we were trying to build from the first conversation - a private service that still feels like the GP practice our patients already trust. They delivered a polished site and embedded Cliniko booking so people can arrange a free chat without leaving the page. The integration just works - and the team kept clinical workflow at the centre throughout.
You are a solo founder or a team of up to four, you have raised between nothing and £250k, you do not have a tech team, and you want a partner rather than a supplier.
You want the cheapest possible build to a fixed spec, or you would rather not hear that part of the plan needs to change.
No. Many founders we work with do not have one. We can act as your technical team and help you decide whether and when to hire.
Yes. The review tells you what is worth keeping and what needs rebuilding before real users arrive.
[Confirm against FatFish standard terms before publishing.]
The Launch Readiness Review is a fixed fee of [£PRICE]. Builds are scoped from the review, so you see the cost before you commit.
Yes. We are London-based and work with founders elsewhere too.
The team
AI-driven technologist David founded FatFish Digital in 2013. He has since architected 100+ products including co-founding recommendations platform Upmost. He guides businesses through complexity to deliver standout digital solutions.
Marketplace and health-tech specialist, advisor and investor. Co-founded leading home improvement marketplace Rated People. Chairs UK therapist matching service Welldoing.org and workflow optimisation platform Carradale Futures.
Owais is a software architect and engineer focused on building scalable, real-world systems that solve meaningful problems. He has led complex full-stack and AI-driven projects at Fat Fish, specialising in LLM integrations, data pipelines, APIs, and cloud infrastructure. Known for his collaborative approach and calm problem-solving style, he brings clarity and positive energy to every team.
Philip is a product-driven strategist focused on solving user and client challenges. He leads cross-functional teams to deliver scalable, high-performing products throughout the full lifecycle. He guided Welldoing’s platform rebuild, managing requirements, timelines, and releases, and continues to optimise the platform based on user insights and analytics.
Twenty minutes, no charge. Bring the prototype, the deck or just the idea.