[codegeek]

A few:

1. Custom domains per tenant (if relevant). For example, if you are building a platform like shopify where each tenant gets their own domain, this is an interesting challenge. Services like cloudflare for SAAS cost an arm and a leg and they restrict apex domains unless Enterprise plan (read six figure per year). You could build your own using something like Caddy with TLS Termination and auto certificate issuance but it's tricky to build for scale (I played around with a prototype for this so I have some learnings from it)

2. Initial Tenant Provisioning specifically their data. Do you have db per tenant or 1 single db for all tenants ? If SIngle DB for all tenants combined, how will you do data isolation and ensure that one tenant doesn't accidently see/process another tenant's data ? If you use multiple DBs, how do you ensure that a request from a tenant connects to that tenant's db without losing performance ? DB Pooling etc etc.

3. Tenant data management after provisioning. Let's say you have DB per tenant. How will you apply a migration across 100s of DBs effectively, accurately and with speed ? Can you customize one specific tenant if they are like enterprise ? How do you handle their migration now ?

There are some of the most challenging aspects. There are many others of course.

[barnabas-szoke]

Great insights and valid technical challenges, thank you!