Business Platform
Travel Management Platform
Tours, reservations, invoicing, and task coordination for a travel business
- Role
- Full-stack developer
- Visibility
- Confidential case study
Overview
A business application for travel operations covering tours and groups, reservations, invoices, tasks, and integrations with external services and payment providers.
Business problem
Travel operations combine scheduling, capacity, money, and people. A tour has groups, groups have reservations, reservations produce invoices, and every step generates tasks for staff. When those live in separate tools, double bookings and missed follow-ups are common.
The platform models those relationships directly so that a reservation, its invoice, and its follow-up tasks are always connected.
Users and workflow
Operations staff create tours and groups, manage reservations against available capacity, issue invoices, and track tasks.
External APIs and payment providers feed data in and out: reference data from third-party services, and payment status from the provider back into invoices.
- Tours and groups
- Reservations
- Invoices
- Tasks
- External API integrations
- Payment integrations
My role and contributions
Worked as a full-stack developer within a team. The list below describes the areas I contributed to; it is scoped to what I worked on and does not represent the entire platform.
- Developed backend services and endpoints for reservation and invoice workflows.
- Integrated external APIs and payment providers, including handling asynchronous status updates.
- Built and maintained frontend screens for operational staff.
- Handled client requirement changes and resolved production issues in existing modules.
Technical stack
- C#
- ASP.NET Core
- REST APIs
- SQL Server
- JavaScript
- Bootstrap
- Payment integration
Architecture
Clients
- Operations staff web app
Application
- ASP.NET Core
- Business rules
- Background processing for integrations
Integrations
- External travel APIs
- Payment provider webhooks
Data
- SQL Server
Technical challenges
Payment state that arrives late
Payment providers confirm asynchronously. Invoices had to tolerate a pending state, reconcile provider callbacks idempotently, and surface failures to staff instead of silently staying unpaid.
Third-party data that does not match your model
External APIs return shapes and identifiers that differ from the internal model. Mapping happens at the integration boundary so the rest of the application only sees its own types.
Design and engineering decisions
Isolate integrations behind adapters
Each external service is wrapped in a small adapter with a typed interface. Swapping a provider or handling an API change touches one place, and the core workflow code stays free of vendor details.
Results and lessons learned
- Connected reservations, invoicing, and tasks into a single operational flow.
- Produced reusable integration patterns for payment callbacks and external API mapping.
Quantified business metrics are not published for this engagement; the results above describe delivered functionality and engineering outcomes.
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