SaaS development: a scalable product from the first customer

SaaS is built to generate recurring revenue. Subscription flow, free trial, plan limits, usage-based billing, churn reduction — all live in the architecture. Optional in 'web app'; foundational in SaaS.

This difference is usually noticed mid-project and the architecture gets rewritten. We clarify SaaS from day one and design accordingly. Investment is positioned upfront and ROI is faster.

Three multi-tenant choices: shared database + tenant column (small/mid), shared database + RLS (mid/large), separate database per tenant (enterprise). For most B2B SaaS, Postgres RLS is optimal.

Postgres row-level security prevents tenant data leak. Every query auto-applies tenant filter; even if a developer forgets the tenant, data won't leak. A clear answer in audits.

Subscription infrastructure via Stripe (international) or Iyzico (Turkey). Free trial, plan upgrade/downgrade, usage-based billing, dunning (failed payment retry), invoice and receipt — all standard.

Webhook flow: subscription.created, subscription.updated, payment.failed, customer.deleted — your app state stays in sync with Stripe/Iyzico. Duplicate accounts, suspended accounts, failed payments — all handled automatically.

50% of SaaS success comes from onboarding. New users seeing value in the first 5 minutes ('aha moment'), activation in 7 days, habituation in 30 — these metrics must be measured.

Churn reduction: usage tracking (passive user alert), customer success outreach automation, exit interview, win-back campaign. We set these up; churn rate is tracked monthly.