Sustaineur — overhauled & scaled a live sustainability platform

Sustaineur was already live but needed serious engineering investment to grow — the codebase required architectural changes, and the product needed enterprise-grade features: multi-tenant isolation, internationalization, payment infrastructure, and AI-powered tooling to make the platform competitive.

• Took over an existing Go + React codebase and drove deep architectural improvements — decomposed the monolith into 7 microservices, refactored the data layer, and made the system properly extensible.
• Designed and implemented multitenancy so multiple enterprise clients can run isolated on the same platform.
• Integrated a payment gateway to support subscription and billing flows for enterprise customers.
• Built full internationalization (i18n) support — platform now serves users across multiple languages.
• Added a theming system so clients can customize the platform's look and feel per tenant.
• Built discussion forums into the platform, enabling teams to collaborate around sustainability projects.
• Integrated an AI chatbot into the projects feature — helping users navigate compliance requirements, get recommendations, and interact with their data conversationally.
• Delivered many additional integrations and feature expansions in close collaboration with the UM6P product team.

Sustaineur evolved from a limited MVP into a full enterprise sustainability platform — multi-tenant, multilingual, payment-enabled, AI-powered, and actively expanding under UM6P backing.