Integrations often start as simple feature requests.
A customer asks for support for a payment provider. Or an accounting platform. Or a shipping service.
At first the work appears straightforward. Read the documentation, connect the systems, map some data.
But once an integration ships, the real cost begins.
Every integration introduces a permanent operational burden.
Integrations evolve over time
External systems do not remain stable.
APIs change. Fields are deprecated. Authentication methods evolve. Entire endpoints disappear.
When a system depends on external APIs, it must continuously adapt to those changes.
This maintenance work rarely appears on roadmaps, but it accumulates over the life of a product.
Failures propagate across systems
Integrations introduce new failure paths.
An upstream API might respond slowly. A webhook might fail to deliver. A third-party service might send unexpected data.
These failures often leave systems partially synchronized.
Recovering from those states requires careful design: retries, reconciliation processes, and idempotent operations.
Integrations accumulate complexity
The first integration feels manageable.
The fifth introduces coordination problems.
By the time a platform supports dozens of integrations, it needs architecture specifically designed to manage them.
At that point integrations are no longer features.
They are infrastructure.
Integrations are often critical to a product's success.
But every integration increases the surface area of your system.
Designing them carefully from the start helps ensure they remain assets rather than long-term liabilities.