#offer

Design canonical Offer, Order and Booking lifecycle boundaries with an explicit booking state machine for travel integrations.

Model NDC Offer/Order lifecycle across search, offer, revalidation, order creation, payment, ticketing, servicing and reconciliation states.

Diagnose stale availability and expired offers across freshness, cache, token and revalidation layers between search and booking.

Design an end-to-end reference architecture for travel search, canonical offers, repricing, payment and booking across supplier integrations.

Implement Duffel Flights API around Offer Requests, Offers, Orders, baggage/ancillaries, payment and airline source-of-truth.

Design deterministic travel-offer fingerprints across provider, room/rate, policy and search-context dimensions without coupling identity to price.

Trace a travel offer from supplier response through normalization, cache, ranking and booking handoff with explicit lineage identifiers.

Learn how to normalize room types, rate plans, occupancy, meal, cancellation and package metadata so hotel offers can be compared without hiding meaningful differences.