System Integration: Connecting the Enterprise with APIs
REST, GraphQL, iPaaS, and event-driven integration patterns kept data flowing between ERP, CRM, and custom apps.
Most organisations in 2022 did not suffer from a lack of software — they suffered from disconnected software. Integration projects turned isolated systems into a coherent operational picture: orders, inventory, finance, and customer records updating without manual re-entry.
Integration styles
REST APIs remained the workhorse for synchronous calls. GraphQL gained traction where mobile and web clients needed flexible queries without over-fetching. For high-volume or decoupled flows, message brokers such as Azure Service Bus, RabbitMQ, or Kafka carried events between services with retry and dead-letter handling.
iPaaS and custom middleware
Platforms like MuleSoft, Boomi, or Azure Logic Apps accelerated standard connectors, while custom middleware handled domain-specific rules that no template could capture. The best programmes mixed both: commodity integrations on iPaaS, critical paths engineered in code with full test coverage.
Quality and governance
Versioned API contracts, OpenAPI documentation, and sandbox environments reduced breakage when vendors upgraded. Monitoring integration latency and error rates was as important as monitoring application uptime.
PrequaliQ builds integration layers that respect your existing investments — Oracle, Salesforce, .NET services, and modern SaaS — without forcing a rip-and-replace strategy.