AI gets you to the demo.
Rivetous gets you to production.
You proved the idea. Now make it real, without losing the momentum you built.
Fixed-scope design engineering for early-stage and scaling SaaS founders and CTOs.
Rivetous (RIV-it-uhs) — rivet + -ous.
Design systems and production code, built together, by someone who takes responsibility for both.
10
working days, kickoff to handover
30
day warranty, every engagement
1
call. everything else is async
100%
human-reviewed before it ships
Fixed-scope sprints
In as little as 10 working days, kickoff to handover.
Accessible by default
WCAG-conscious and tested, not bolted on after.
Documented, not mysterious
Storybook and strict TypeScript, every engagement.
Async by design
One kickoff call. Everything else runs without you.
Sound familiar?
"AI tools gave us a fast, convincing prototype. It looked done. It wasn't."
A demo only has to survive one user, on one machine, on the happy path. Production doesn't — and that gap is exactly where Rivetous operates.
How engagements are scoped
Packages exist so scope stays fixed. Every engagement starts with the Foundation; each stage builds on the last.
Stage 1 — every engagement starts here
Rivetous Foundation
A documented, accessible component library fully themed to your brand.
- Brand translated into design tokens
- Every component documented in Storybook
- Accessible and type-safe throughout
From £3,750 + VAT
ViewStage 2 — requires the Foundation
Website Starter or SaaS Starter
A production-ready marketing site, or a dashboard wired to your API. Built on your Foundation.
- Up to 6 pages, or two full feature modules
- SEO and performance engineered in
- Wired to your API from day one
From £6,950 + VAT
ViewAs needed — after a core package
Add-On Sprints
Extra components, motion enhancements, or a new SaaS feature module.
- Fixed scope and price
- 2-3 days for component work
From £1,200 + VAT
ViewHow we work
Kickoff
One call to align on scope and tokens. The only meeting.
Build
Async delivery. Progress on a shared board, in parallel with your own work.
Handover
Full docs, Storybook, and tests. Your team is ready to run it.
Warranty
30 days covered. If something's wrong, it's ours to fix.
What people say
15+ years building production frontends, most recently AI-assisted. Rivetous runs its own marketing site and showcase on the same Foundation it sells.
"Whatever he commits to, he consistently delivers on. He has harnessed agentic coding tools well ahead of most of the industry and pairs that with genuine product instinct."
Product Owner and Engineer
"Deep React and TypeScript experience. Give him a problem and he will find a sensible way forward without overcomplicating things. A calm, dependable approach that teams quickly come to rely on."
Senior JavaScript Engineer
"An uber-talented developer with a knack for always finding the best solution. Book him, he will not just do it, he will do it mighty well."
VP, WPP
Find Out More
Tell us about your project. We respond to every enquiry personally.