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George Khananaev
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#architecture

2 posts

Read StaySync: B2B hotel allotment management
Case Study
Moon Holidays

StaySync: B2B hotel allotment management

NestJS 11 + Drizzle + PostgreSQL 17 platform with 12 modules, 532 tests (99.63% allotment coverage), and a Contracts → Resolver → PoolBudget pipeline

StaySync is the B2B hotel allotment platform: allotment calendars, hardblocks with amendment history, booking orders, advisory-locked availability checks, and real-time sync with the Moon Holidays supplier API. Built on NestJS 11 with Drizzle ORM, PostgreSQL 17, Firebase auth, 12 business modules, 17 test suites, 532 tests, and two Next.js frontends consuming the API.

nestjstypescriptpostgresqldrizzlefirebaseb2barchitecturezod
Feb 2026 — Present5 min
Read Travel Panel: the core travel management platform
FeaturedCase Study
Moon Holidays

Travel Panel: the core travel management platform

FastAPI backend, Next.js operator portal, and B2B partner portal powering Moon Holidays end to end

Travel Panel is the core system at Moon Holidays. A FastAPI backend, a Next.js operator portal, a B2B partner portal, and the orchestrator for every downstream product: TravelOffer for end customers, Live Deck for call-center TVs, Vercel Controller for deployment cache, StaySync for allotment availability, and a WebSocket messenger for internal communication. Running on AWS with ALB, MemoryDB, CloudFront, S3, and more.

fastapinextjspythontypescriptmongodbvalkeyawsmulti-tenantsaasarchitectureplatformorchestration
Dec 2022 — Present11 min