[Services]
Engineering for the parts that have to be right.
We take on a small number of contract projects each year, and we only take the ones where privacy or correctness is genuinely load-bearing. The products on this site are the evidence.
- Architecture review
Fixed fee · 1–2 weeks
- Build partnership
Milestone based
- Embedded support
Monthly retainer
Zero to shipped
An idea turned into a working, deployed, documented product. This is the exact path Mangofold and bottlemail took, so the process is already worn in.
- Product scoping and technical architecture
- Design system and build
- Full implementation
- Deployment pipeline and hosting setup
- Documentation and a handover you can maintain
Good fit: You have a problem worth solving and no team yet.
Privacy & authorisation
Multi-tenant data models are where most applications quietly go wrong. We put the trust boundary in the database and test it like it matters.
- Row-level security design and review
- Encryption at rest, blind indexes, signed URLs
- Zero-knowledge storage architecture
- Boundary test suites (RLS assertions, E2E)
- Incident-ready audit of your current policies
Good fit: Your authorisation lives in client code, or you are about to launch multi-tenancy.
Cloudflare architecture
Workers, Durable Objects, Queues, R2 and D1 are powerful and badly understood. We design against their actual semantics rather than around them.
- Migration to Cloudflare from any host
- Durable Object and Queue architecture
- Caching and prerendering strategy
- CI/CD and preview environments
- Observability, alerting and cost review
Good fit: You want the edge without the surprises.
Product engineering support
Ongoing feature work and hardening for teams already shipping on this stack — an extra set of hands that already knows your patterns.
- Feature development and refactoring
- Hardening and performance work
- Test coverage expansion
- Release management and versioning
- Code review and architecture guidance
Good fit: You have a product and you have run out of runway.
[How we work together]
Ways to engage.
Three shapes of engagement. Most projects start with the first one.
Architecture review
A fixed-scope pass over your existing codebase and data model, returning a written report of what is load-bearing and what should change.
Fixed fee · 1–2 weeks
Build partnership
We take a defined slice of your product and own it end to end, working alongside your team or in place of it.
Milestone based
Embedded support
A standing allocation of engineering time for feature work and hardening, with a monthly review of what shipped.
Monthly retainer
[Honest boundaries]
What we will turn down
Saying no early is cheaper than a bad fit three months in. These are the four we decline most often.
- 01Anything that needs to run inside a customer's private network
- 02Work that requires a compliance certification we cannot evidence
- 03Lock-in contracts longer than the engagement itself
- 04Products whose business model is other people's data
[Proof of work]
What we have actually shipped.
You can read the code behind every one of these before you talk to us. That is deliberate.
Mangofold
A private home for the groups you actually want to talk to.
FamilyFolds
The operating system for your household.
bottlemail
Unsent letters drifting at sea.
Slateberry
A classroom workspace with no 1-on-1 DMs at all.
Fivefold
Learn something useful in five minutes.
My Mini Cafe
Brew coffee, serve customers, earn coins, upgrade.
[Next step]
Tell us what you are building.
We are currently taking on select projects for 2026. If you have something in mind, describe it and we will tell you honestly whether we are the right fit.
Taking on select projects for 2026