Context

HealthHero, a European teleconsultation platform resulting from the acquisitions of Qare (France), MyClinic (France), and Fernarzt (Germany), aims to become the European leader in e-health with tens of millions of annual consultations.

To achieve this, the group decided in 2024 to unify its IT systems inherited from its acquisitions, which often did not comply with European standards (HDS, NHS Digital, ISO 27001) and were difficult to maintain.

The technical department then chose to rely on the Qare stack (Loopback.js), the only backend controlled internally. Although robust, this base requires comprehensive modernization to become the common platform and allow: reducing recurring costs, accelerating the deployment of new functionalities and facilitating international expansion with an architecture that meets local requirements.

This migration, led by Theodo, is a strategic lever for accelerated growth at controlled costs.

Challenges

• Adastra replacement required in less than 12 months.
• Complete redesign: backend with intertwined, undocumented code, magic dependencies, and a lift-and-shift to NestJS excluded.
• Continuous delivery in parallel with the migration, without feature freezes.
• Multi-environment complexity (Azure/AWS) and a common backlog on a transforming base.
• PMS with 115+ interconnected screens, a complex database, and essential business workflows.

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