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Preux

A London software firm of senior builders. Custom software for real operations, taken to production.

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Preux

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Designed & built in London.

Healthtech · Custom platform · React + .NET

Tracking irreplaceable specimens across seven US facilities, on one system of record

We built CryoFuture One from the ground up: the HIPAA-compliant platform of record behind a national network of fertility biorepositories.

Collections

+20% monthly

Facilities

7 nationwide

Data breaches

Zero since launch

The challenge

The specimens are irreplaceable. There is no second copy, and the cost of a tracking error is absolute. Yet inventory lived in manual logs, consent on paper, and billing in separate systems, every one of them an audit risk.

Clinic staff had no real-time view of specimen status or storage conditions, and arranging a transport meant phone calls and manual coordination. The network needed one system of record, built to the standard the stakes demand.

Our approach

We built CF1 from first principles: specimen inventory traceable to the individual vial and straw, with role-specific dashboards for embryologists, administrators and directors, and GPS-tracked transport with a complete chain of custody.

A patient portal handles onboarding, plan selection, e-consent and payments, while cycle-based and specimen-level billing renews automatically, replacing the fragmented account management that was leaking revenue.

The architecture is HIPAA-compliant and multi-tenant, with role-based access, full audit trails and EMR-ready integration. React and TypeScript on a .NET core, running on Azure.

Inside CF1 — specimen inventory, chain of custody and billing in one system of record.

Outcomes

  • Locating a specimen or scheduling a transfer takes seconds instead of phone calls
  • Automated billing lifted monthly collections by roughly 20%
  • Zero data breaches since launch, with consent and chain of custody fully automated

Client

CryoFuture

Sector

Healthtech

Discipline

Custom platform · React + .NET

Engagement

Ongoing

Built with

Next.jsReactTypeScript.NETAzurePostgreSQL

Next case

A document platform at national scale — 1.3 billion records

Ministry of Finance, Romania · Public sector →

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