BlueWave
One system for UK water-hygiene contractors: scheduling, an offline field app, five-year compliance records and quoting that follows the work. Built so an LCA audit is a search box rather than a fortnight of digging.
01 / 05Case study
Software studioLondon, UK51.5° NBooking Q3 projects
London software studio
We build the products founders bet on.
Quantum Craft is a small London studio with two decades and a few exits behind it. We take funded startups from a rough idea to production software, the kind your next investor actually wants to see under the hood.
20yearsshipping production software
Built with
- .NET 8
- Next.js 16
- React 19
- TypeScript
- PostgreSQL
- Kubernetes
- Elasticsearch
- Pub/Sub
- Stripe
- Claude API
- Event-driven
- Microservices
20yrs
Shipping production code, not prototypes
5built
Platforms shipped from first line to launch
4phase
From discovery to launch, no surprises
MVP→A
Where we take teams, seed to Series A
01Work
A few things we’ve built
Real platforms in production, doing the unglamorous work well: compliance, scheduling, payments, records. Not demos.
NForge
Business software for independent fitness coaches: clients, programmes, live classes and payments in one app, at £0 a month and 7.9% only when the coach gets paid. Forge AI writes the first draft of every programme.
02 / 05Case study
TIYO
A retail-intelligence platform that reads fashion demand from the shelves: size-level availability tracked across 22 retailers in 13 countries, refreshed through the day and turned into signals buyers can act on.
03 / 05Case study
Karu
Karu is a privacy-first platform for UK therapists: diary, session notes, records and video in one calm system, built so client confidentiality is a property of the architecture rather than a promise.
04 / 05Case study
B2B logistics marketplace
A two-sided marketplace for warehousing and transport that keeps working after the match: search, contract, then run the whole operation through one event-sourced platform. The client is under NDA, so the screens here are indicative.
05 / 05Case study
02Services
What we actually build
Eight things we’re genuinely good at, and would put our own name on. Not a menu of everything.
04Process
Idea to production in four moves
No black box. Every phase has a fixed shape, a rough duration, and things you can hold in your hand at the end of it.
01
Discovery
≈ 1 weekWe turn the idea in your head into something we can quote. Wireframes, a technical spec, an architecture, real estimates, and the risks nobody wants to name up front.
- Wireframes & user flows
- Technical specification
- Architecture & stack
- Estimate, timeline, risks
02
Kickoff
Week 1–2The work gets broken into sprints with milestones you can hold us to. Environments, CI/CD, onboarding and the metrics we'll judge success by are all in place before we write feature code.
- Sprint roadmap
- Dev environments & CI/CD
- Comms protocol
- Success metrics
03
Build
Sprint cyclesTwo-week iterations, a working demo at the end of each one. You see progress you can click, not a status you have to trust. Tests and reviews run the whole way through.
- Working increments
- Sprint demos & reviews
- Automated tests
- Progress reports
04
Launch
Final sprintInto production, tuned and audited. Then a proper handover. Your team gets the documentation, monitoring and knowledge transfer to own it rather than lean on us.
- Production deploy
- Performance & security pass
- Documentation
- Handover & support plan
The studio03The studio
How we think about the work
Three things we don't compromise on. They're the reason clients keep our number.
- 01
Twenty years. A few exits. No training wheels.
We've built, scaled and sold software companies. We know what a cap table is, what burn does to a roadmap, and what an investor opens first in your repo.
- 02
We write code like we're paying for it.
Because eventually someone is. Scalable architecture, real tests, and documentation the next CTO won't curse us for. No prototypes dressed up as products.
- 03
You always know where you stand.
Scope is agreed up front, in writing, with milestones. You won't get mystery invoices or quiet scope creep, and if something's slipping, you hear it from us first.
05Stack
The tools under the hood
Enterprise-grade, boring where it should be boring. We pick tools that are still a good idea three years after launch.
01
Backend & APIs
- .NET 8 (C#)
- ASP.NET Core
- Node.js
- EF Core
- GraphQL
- REST
02
Frontend
- Next.js 16
- React 19
- TypeScript 5
- Tailwind
- Framer Motion
- React Query
03
Data & storage
- PostgreSQL 17
- MySQL
- Elasticsearch
- Redis
- GCS
- Azure Blob
04
Cloud & infra
- Kubernetes
- Docker
- GCP
- Azure
- AWS
- Cloud-native
05
Messaging
- Cloud Pub/Sub
- RabbitMQ
- Service Bus
- Event-driven
- Async workers
06
AI & ML
- Claude API
- OpenAI
- MCP servers
- LangChain
- Vector DBs
07
DevOps
- GitHub Actions
- Seq
- Kibana
- App Insights
- CI/CD
08
Auth & security
- FusionAuth
- OAuth 2.0
- JWT
- Auth0
- RBAC
Weeks, not months. Most first versions ship in 6 to 12 weeks, depending on scope. We move quickly by reusing patterns and tooling we've shipped before, without cutting corners. After a short scoping call you get a real timeline instead of a guess.
Let's talk
Ready to build the thing?
Book a free 30-minute call. We'll dig into your idea, your stack and your timeline, and give you an honest read on what it will take to build and launch. You'll leave with a clearer plan whether or not you hire us.