Booking System Development Services

Real-time availability engines that prevent double bookings across all channels simultaneously, holding inventory during active checkout sessions using Redis SETNX with a configurable TTL (typically 10 minutes) so two guests can never book the same unit in overlapping sessions. The hold is released automatically if checkout is abandoned; confirmed on payment success. Distributed locking strategy: optimistic locking for low-contention single-unit bookings (check-and-set with version counter); pessimistic locking for multi-unit batch holds where partial failure must be rolled back.

Calendar views across all properties, resources, or staff with colour-coded booking status (confirmed, pending, blocked, checked-in, checked-out). Admin controls for blocking inventory: maintenance windows, owner stays, deep-clean holds, and staged release of newly onboarded units, all with configurable start/end, internal note, and optional minimum-stay override during the hold period.

Channel sync architecture: iCal export endpoints (RFC 5545 VCALENDAR format) for OTA connections that don't support direct API, Airbnb, Vrbo, and HomeAway all consume iCal for availability. Direct API integration for channel managers that support two-way sync: Rentals United API (v2 REST) for multi-OTA distribution to Booking.com, Expedia, and Airbnb simultaneously; Lodgify API for short-term rental operators; Guesty OpenAPI v1 for property management groups; Cloudbeds API for hospitality operators. Webhook callbacks from channel managers on booking confirmation, modification, and cancellation trigger real-time calendar updates so the master availability database is always the system of record. Channel sync conflicts resolved by last-write-wins with a priority hierarchy: direct bookings override OTA holds; the first confirmed booking wins over simultaneous OTA requests for the same date range.

Custom multi-step booking flows designed around your inventory type and conversion requirements. Three booking modes: instant booking (availability checked, payment collected, confirmation sent in a single session, highest conversion, used for property and activity operators); request-to-book with approval (guest submits request, host/operator approves within a defined window, payment collected on acceptance, used where host vetting matters); quote-based flow for complex requirements where price depends on configuration (group size, equipment selection, duration options) before a price is presented.

Date and slot selection with real-time availability checking on every interaction, date selection triggers an immediate availability API call so the guest sees the current state, not a cached snapshot from page load. Calendar UI built with custom business logic: minimum stay enforcement (unavailable dates are greyed out when fewer than the minimum nights remain), gap night display (orphan 1-2 night gaps shown with a discount to encourage filling), and blocked dates shown with reason where configured.

Guest details capture with validation: name, email, phone, document collection (passport/ID for regulated accommodation), and custom fields per booking type. Add-on selection at checkout: early check-in (£25 per hour before standard time), late checkout, parking bay allocation, airport transfer, welcome pack, equipment hire, each add-on validates against its own availability or capacity rule before being added.

Confirmation flow: booking confirmation email sent via SendGrid or AWS SES within seconds of payment success, containing iCal attachment (RFC 5545) compatible with Google Calendar, Apple Calendar, and Outlook; full booking summary with itemised pricing; digital door code or access instructions for keyless properties; cancellation policy and amendment instructions. Abandoned checkout recovery: if a guest enters email in step 1 but does not complete payment, an automated follow-up email triggers after 2 hours with a booking link pre-populated to their previous selection. Direct booking conversion for our serviced apartment client increased 3x after launching the custom booking flow versus relying on OTA-only channels.

Dynamic pricing rule engines that apply layered rate logic at quote time, with every rule configurable by your operations team through an admin interface, no engineering involvement required to change seasonal rates, launch promotions, or adjust length-of-stay pricing.

Base rate structure: seasonal rate tables (summer, winter, Christmas/New Year, school holiday periods) with date ranges defined per year; day-of-week variations applied on top of the seasonal base (Friday/Saturday at 1.15x multiplier, Sunday through Thursday at base rate for short-term rental operators); unit or resource-specific overrides where premium units carry their own pricing independent of the base table.

Length-of-stay pricing: per-night rate decreases as stay length increases, a 7-night stay priced at a lower per-night rate than a 2-night stay. This is configured as a discount table (2 nights: 0%, 3-4 nights: 5%, 5-6 nights: 10%, 7+ nights: 15%) applied to the base rate for the date range, with minimum stay rules enforced per season (2 nights minimum in low season, 3 nights in peak, 5 nights over Christmas week). Gap night logic: orphan 1-2 night gaps between existing bookings offered at a configurable discount (typically 20-30% off) to recover revenue from otherwise unbookable nights.

Occupancy-based pricing: as availability for a date range falls below configured thresholds (50% remaining units: +10%; 25% remaining: +20%; last unit: +35%), base rates increase automatically. Last-minute discounts applied as availability-tightening logic in reverse: when a date is more than 60 days out and occupancy is below 30%, a configurable early-bird discount is applied.

Promotional codes with usage controls: single-use or multi-use codes, percentage or fixed-amount discount, minimum booking value requirement, expiry date, bookable date range restriction, and per-code usage cap. For service businesses: peak/off-peak by hour of day, package rates bundling multiple service slots, corporate account codes with negotiated rates, and member pricing tiers applied automatically to authenticated loyalty accounts.

Payment collection via Stripe (primary, Stripe Payment Intents API v2 for 3DS2-compliant card processing, Stripe Checkout for hosted payment pages, Stripe Billing for subscription-based bookings), PayPal REST API v2 for PayPal Wallet and Pay Later, and regional providers where required (Square for US service businesses, Worldpay for UK hospitality operators, Adyen for multi-currency international operators). Payment method coverage: Visa, Mastercard, Amex; Apple Pay and Google Pay via Stripe's Payment Request Button (browser-native, no additional integration per device); SEPA Direct Debit for European operators collecting from repeat guests; bank transfer with automated reconciliation for corporate account bookings.

Deposit and balance flows for high-value bookings: a configurable percentage (typically 20-30%) collected as a deposit on booking confirmation via Stripe Payment Intents with capture_method: manual; the balance amount stored as a scheduled payment for a defined number of days before arrival (typically 30-60 days). Automated balance payment reminders sent at 7 days, 3 days, and 1 day before the balance due date; if the stored card declines, a payment failure notification triggers with a re-entry link. The balance is captured automatically on the due date if the card is valid; failed captures are held for 48 hours with escalation to manual review.

Damage deposit handling: a pre-authorisation hold placed on the guest's card at check-in (not a charge, the amount is blocked but not captured); released automatically after inspection sign-off in the admin panel, or captured partially or in full if damages are recorded. Stripe SetupIntents API manages the pre-authorisation hold with a 7-day capture window.

Cancellation and refund calculation: the system applies your cancellation policy rules to calculate the correct refund at the time of cancellation request, full refund if cancelled more than 14 days before arrival; 50% refund 7-14 days; no refund under 7 days. The calculated refund amount is displayed to the admin before confirming, and Stripe Refunds API initiates the refund without manual card number handling. For marketplace models: Stripe Connect for split payment, platform takes commission (held in escrow), operator receives the balance via automated payout to their connected bank account on the day after checkout.

Guest and client profiles that build automatically from each booking: contact details, identity documents, payment methods, complete booking history across all units, communication log, stay preferences (bed configuration, floor preference, allergies/accessibility notes), and notes added by the operations team. Profile deduplication using email as the primary key with phone number as a secondary match, a returning guest who books under a different name still connects to their existing profile.

Pre-arrival communication sequences automated from booking confirmation through checkout: booking confirmation email with full booking summary (within 2 minutes of payment); pre-arrival email 5 days before arrival with local area guide, parking instructions, and check-in time reminder; check-in instructions email 24 hours before arrival with digital door code or lockbox combination; day-of-arrival SMS with door code re-confirmation and emergency contact number. All communication timings and content are configurable per property or service type without code changes.

Keyless access integration for property operators: Salto KS API and Salto Space API for Salto smart lock systems (the integration used for City Break Apartments, guests receive a unique PIN valid for their stay duration, generated automatically at booking and revoked at checkout); Nuki Web API for Nuki smart locks; Yale Access API for Yale Assure Lock systems; generic webhook-based integration for other access control systems. The access code is included in the pre-arrival email and day-of-arrival SMS, no staff involvement required for check-in.

Post-stay review collection: review request email sent automatically 24 hours after checkout with a direct link to your review form; responses stored against the guest profile and aggregated for display on your booking site and operations dashboard. Review response tracking: if no review after 3 days, a gentle reminder is sent (once only, not a drip sequence). Repeat guest recognition: guests with 2+ completed stays receive a configurable loyalty discount applied automatically at checkout (e.g., 10% for guests who have stayed 3+ times), visible in the price breakdown without requiring a promo code entry.

Admin dashboard giving the operations team complete visibility and control: unified calendar view across all units, resources, or staff showing every booking, block, and hold in a single view; booking management interface for creating manual bookings, processing amendments, handling early departures, and managing check-in/check-out; availability controls for releasing blocks, adjusting hold periods, and managing staged inventory releases. Booking detail views show the full guest record, payment history, communication log, access code status, and any notes from the previous stay.

Automated housekeeping schedule generation: every checkout triggers a cleaning task assigned to the housekeeping team via a mobile-friendly task app; housekeepers see their daily schedule, mark properties as cleaned, flag maintenance issues found during cleaning, and confirm the unit is guest-ready, updating the real-time status on the operations dashboard. Maintenance issue logging from housekeeping feeds a maintenance queue with priority, photos, and estimated resolution time. Maintenance windows booked through the operations admin automatically block the unit on the availability calendar and across all connected OTA channels.

Revenue management metrics presented on the operations dashboard: occupancy rate (booked nights / available nights), average daily rate (ADR), revenue per available unit (RevPAU), and length-of-stay distribution, updated daily from confirmed bookings. Period-over-period comparison (current month vs prior month vs same period last year) and channel breakdown showing what percentage of bookings and revenue came from direct, Airbnb, Booking.com, Vrbo, and other channels. The channel mix view is the key output for understanding whether OTA commission costs justify the volume versus the direct booking conversion rate.

Channel manager connection management: OTA channel status visible in the admin (last sync time, any failed updates, pending booking requests); manual channel disable for a property during maintenance or renovation; and booking source tagging on every reservation so revenue attribution is accurate. Staff access control: admin roles (full access), operations roles (booking management, no pricing or financial data), housekeeping roles (task view only, no guest financial data), enforced at the API layer, not just the UI, using JWT role claims validated on every request.