Web interfaces & user interaction
Responsive views, form state, user feedback and task-oriented navigation.
TECHNOLOGY & ARCHITECTURE
The application stack.
The engineering behind it.
A layered approach to user interfaces, business workflows, integration and data. Technology selection follows the requirements of each application.
Development stack
Used in our travel platform| Layer | Technology | Responsibility |
|---|---|---|
| Language | TypeScript | Typed application code and interface contracts. |
| Interface | React | Component-based interfaces and interactive application views. |
| Application framework | Next.js | Routing, server rendering and application request workflows. |
| Server runtime | Node.js | Server-side execution and external service integration. |
| Database | PostgreSQL | Relational records, constraints and transactional data. |
| Data access | Prisma | Schema-driven database access and migration tooling. |
Other products and custom projects use the stack specified in their implementation proposal.
CONCEPTUAL SYSTEM DESIGN
Application layers
Business workflows & integration
Server-side validation, authorization rules, application state and API communication.
Structured data & external services
Relational records, transactional operations and controlled integration boundaries.
Engineering controls
API Engineering
- Documented request and response contracts
- Input validation and error handling
- Webhook verification requirements
- Timeout, retry and duplicate-request handling
Data Integrity
- Relational constraints and schema validation
- Transactional workflow requirements
- Controlled schema migrations
- Backup and restoration arrangements
Application Security
- Authentication and role-based access requirements
- Server-side authorization and validation
- Protected integration credentials
- Customer-record access boundaries
Operations & Release
- Environment-specific configuration
- HTTPS and deployment access
- Logging and monitoring requirements
- Acceptance checks and release handover
Controls are configured and validated for each deployment. Advanced monitoring, 2FA, audit logging and compliance requirements are separately scoped.