Cortel: How We Built It

Cortel is a travel · proptech · mobile app product. A mobile-first cottage booking ecosystem: guests verify their identity, book and pay securely, then receive a QR entry key on their phone.

Live at cortel.am/en.

We document the stack publicly so future teams know why each layer exists — not just which logos appear on the slide deck.

1. 01React — rich client UI where interaction density is high
2. 02Node.js — APIs, webhooks, and background jobs in one language
3. 03React Native — rich client UI where interaction density is high
4. 04PostgreSQL — relational data, auth, and predictable queries at scale

Every addition passed a simple test: does it reduce code we own, or does it introduce an ops burden we are ready to carry?

We favor thin vertical slices early: auth, one critical user journey, admin visibility, and production deploy. That proves the architecture before feature sprawl.

• Clear API boundaries between UI, business logic, and integrations
• Observability on the paths that affect revenue or trust
• Staging environments that mirror production data shape, not just code
• Performance budgets on public routes before launch marketing

Delivery focused on operability: the client's team can run day-two without guessing how deploys, content, or support flows work.

• Production deployment with documented runbooks
• Admin or operator tooling where the product needs live updates
• Public launch with analytics on critical funnels
• Handoff session covering monitoring and incident response

Explore the live product at cortel.am/en — or browse more case studies in our archives.