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HomeHealthcare & life sciencesCase study · P-036
Healthcare & life sciences · Health platform

Care 03 — proximity health-risk detector.

A pandemic-era proximity app that alerts users if an infected contact is within a 6-metre radius and computes contact and health scores.

Selected clients · 2010 – today
Power to LiveRBM GlobalDragonflySquiblerMOOSainsbury'sMPCX-LinkPower to LiveRBM GlobalDragonflySquiblerMOOSainsbury'sMPCX-LinkPower to LiveRBM GlobalDragonflySquiblerMOOSainsbury'sMPCX-Link
/01
The problem

The challenge.

Public-health authorities needed a privacy-respectful way to warn users about nearby infection risk.

Phone-based BLE proximity detection is noisy and battery-expensive if implemented naively.

The app had to be simple enough for any demographic and robust enough for health officials.

/02
The plan

Our approach.

Implemented BLE-based proximity detection with distance estimation via signal strength.

Computed contact and aggregate health scores in Python using configurable thresholds.

Kept personal identifiers off-device where possible, sharing only anonymised exposure signals.

Shipped a minimal React Native UI with clear, non-alarming messaging.

/03
The result

The outcome.

Users received actionable proximity warnings without feeling surveilled.

The model scaled to community-sized deployments during peak caseload.

Battery usage stayed below competitive benchmarks.

Engineering stack

What it was built with.

The exact tools in the delivered system. We pick the stack to fit the problem and the team — not the trend cycle.

/01Python
/02React Native
/03Bluetooth LE
/04Firebase
/05PostgreSQL
Trusted by our clients

What partners
tell us.

Most clients renew for a second engagement. The ones who don't usually hire someone from our team to run the project in-house.

We are a mental health charity and not tech minded. We needed to improve our patient registration system but wanted a company that we can relate to. Hassan took the time to meet with me and patiently went through our process to find a personalised solution for us. Hassan's team did a great job streamlining our process and connected our registration system to our patient management software. Whenever we have a glitch, they resolve this quickly. Cloudini provides a personal and efficient service and we have adopted them to be our IT provider.
Tien Kuei, CEO at Power to Live Foundation
Tien Kuei
CEO · Power to Live Foundation
I am writing to wholeheartedly recommend Cloudini as a premier bespoke software development agency. Our journey with them has been nothing short of exemplary, far exceeding our initial expectations. While many agencies can develop based on strict specifications, Cloudini demonstrated an incredible commitment to our project that was truly unparalleled.
Robert McPherson, Managing Director at RBM Global Ltd
Robert McPherson
Managing Director · RBM Global Ltd
Dragonfly has been working with the team at Cloudini for several years now on building out our web-based platform and APIs. One of their strengths is quickly building out a multi-disciplinary team to work on the development and delivery of features with different technical requirements. Their support has allowed us to accelerate our development work without building an internal team. They have also worked seamlessly with other third parties both during the acquisition of Dragonfly and development of our mobile app. Cloudini has been instrumental in bringing our ideas to life and providing guidance to help us make the best technical decisions. I would recommend getting in touch with them if you're looking for support.
Rebecca Palser, COO at Dragonfly
Rebecca Palser
COO · Dragonfly
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