We implemented BambooHR for onboarding/records and Paychex Flex for payroll at 15 employees. The integration is officially supported but brittle. The core issue is eventual consistency between systems, which creates compliance risk.
For example, a termination in BambooHR can take 4+ hours to propagate to Paychex via their API. Our audit script flagged this latency. The webhook payload is also minimal, requiring a secondary API call to Paychex for full payroll context.
```json
// Example BambooHR webhook for 'employee_change'
{
"event": "employee_change",
"employeeId": "12345",
"timestamp": "2024-05-15T14:32:10Z"
}
// No termination date or final paycheck details included.
```
Paychex support for payroll errors is procedural but slow. A tax filing error took three business days to resolve with manual corrections. For a sub-20 team, the decoupled system adds operational overhead. A single-platform solution may have lower observable complexity.