Connecting your product to an external system — CRM, ERP, accounting, payments, delivery, marketplaces — so data moves between them automatically instead of being re-entered by hand.
Integrations are where most project delay comes from: third-party documentation is wrong, sandboxes behave differently from production, and partner support is slow. They are also what makes the product fit real operations.
We check the real API early rather than trusting the documentation, build integrations resilient to outages with retries and queues, and monitor them separately so a partner's failure is visible as theirs, not yours.