Healthcheck screen

HealthCheck by Stratum

SaaS platform helping to protect against the risk of COVID-19 infection and seasonal viruses
usa USA
Stratum logo

Project Background

In June 2020, as COVID-19 lockdowns were lifted across the United States, company leaders faced the considerable challenge of how to restart their businesses while ensuring the safety of their employees and customers.

On average, 88 percent of the workforce is expected to be back on-site by December 2020, according to a McKinsey survey.

As part of the guidance for reopening businesses, the Centers for Disease Control and Prevention (CDC) provided recommendations on how to protect on-site employees. Among these are limiting person-to-person contact, identifying and isolating potentially infectious people, increasing hygiene protocols, and using protective personal equipment.

At-home health surveys are expected to become one of the efficient measures that can prevent the spread of disease and help keep employees safe at their workplaces.

Project Description

HealthCheck by Stratum is a complex solution that includes web, mobile and wearable applications which help to provide regular health assessments of employees, clients, students or guests. By answering a short series of questions based on CDC and local State guidelines, users can protect each other from the spread of COVID-19 and other infectious diseases.

HealthCheck screen

Project Challenges

Strategy to launch a product quickly


to launch a product quickly to be the first to market in a pandemic situation
Flexible requirements

Flexible requirements

at the beginning of the project
Publication on App Store and Google Play


on mobile app stores due to restrictions for COVID-related applications

Solution Architecture

The software engineers designed a multi-tenant architecture. Being a Software as a Service (SaaS), the application provides constant and easy delivery to end-users. Based on Microsoft Azure web services, the solution maximises performance, security and scalability, allowing a solution to evolve over time. The development team offered the following architecture:
HealthCheck by Stratum architecture

Team Structure

HealthCheck by Stratum team structure


  • Web Application
    Web Application
  • Cross-platform Mobile Application
    Cross-platform Mobile Application
  • Wearable Applications
    Wearable Applications
  • UI/UX Design
    UI/UX Design
  • backups
    Data Collection
  • Data Visualisation
    Data Visualisation
  • Quality Assurance
    Quality Assurance
  • Dashboard
  • Admin Panel
    Admin Panel
  • Cloud Infrastructure Design
    Cloud Infrastructure Design



  • Flutter
  • Swift


  • Angular 8
  • HTML5
  • CSS3
  • Figma


  • .NET Core Framework 3.1
  • ASP.NET Core
  • Entity Framework Core


  • Azure SQL
  • Azure Service Bus
  • Azure Storage
  • Azure Functions
  • Azure Application Insights
  • Amazon Simple Email Service
HealthCheck by Stratum screen


In brief, SSA Group delivered an easy-to-use solution for web, mobile and smartwatches, allowing company leaders to ensure workplace safety and protect their on-site employees, customers and guests according to CDC recommendations. The application:

  • Helps employees get back to work
  • Keeps workplaces safe
  • Prevents the spread of infectious diseases
  • Helps to protect against flu and viruses
  • Saves human lives


25k+ Active users per month
18k+ Checks per day
30+ Cases discovered per day
HealthCheck by Stratum Chart
HealthCheck by Stratum screen 2

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