Testing and QA for enterprise software: guide for teams without dedicated QA

Testing is not optional in enterprise software — it's what separates applications that can be maintained and scaled from those that become technical debt at 18 months. A team without tests doesn't go faster: it goes faster until the first critical production bug.

• •Start with integration tests for critical business processes: the complete order flow, billing cycle, authentication. These are the ones that hurt most when they break in production.
• •Unit tests for complex business logic: pricing rules, business validations, data transformations. Not for all code — only for logic containing business rules that change.
• •E2E tests (Playwright, Cypress) for main user flows: the 5-10 flows that 80% of users follow. Automated in the CI/CD pipeline to detect regressions before each deploy.

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