Multi-tenant SaaS built to run hundreds of customers

Mid and Large-Scale SaaS

A SaaS at this scale is a different engineering problem from a micro SaaS, even when the screens look similar. Each customer — a clinic, a firm, a shop — is a tenant with its own data that must never leak into another's, its own users with different permissions, and often its own rules. Billing runs by plan, support needs to see what each tenant sees, and a failure at three in the morning affects hundreds of businesses at once. None of that can be added later without rebuilding.

ApexDev architects for this from the first decision. Tenant isolation at the database level, not just in the code. Roles and permissions as a system, not a list of ifs. Billing and plans that the business can change without a deploy. Observability that shows which tenant is slow before they call. And a migration path from whatever the customers use today — because a SaaS that replaces spreadsheets and legacy systems has to bring their data with it. MedApex, our own multi-tenant clinical platform, runs on exactly this architecture.

What we need from you is a product owner: someone who decides what the product does when two customers want opposite things, and who prioritizes the roadmap. What you get is a platform your team can operate and extend, with the code, data and infrastructure accounts in your name, and a maintenance agreement that is separate and cancellable.

/003/ — Tech Stack

/004/ — OTHER PROJECT TYPES