System overview

#Components

• Web app – single-page app served from a CDN.
• API – stateless REST API behind a load balancer.
• Workers – background jobs for imports, emails and webhooks.
• Database – managed MySQL with point-in-time recovery.

#Hosting regions

Customer data is stored in the region chosen at sign-up: EU (Frankfurt) or UK (London).

#Data flow

Browser ──HTTPS──▶ CDN ──▶ API ──▶ MySQL
                           │
                           └──▶ Queue ──▶ Workers ──▶ Email / Webhooks