Node.js Backend Application Development

Node.js runs JavaScript on the server. We use it for APIs, integrations, background operations and applications that need event processing and communication between services. TypeScript adds typed contracts and data models, while the application structure follows its business workflows.

Node.js in DELIN

The DELIN platform uses Node.js and NestJS on the backend, together with PostgreSQL, separate worker processes and Temporal for long-running workflows. Its web application and marketing site use Nuxt and Vue. Explicit responsibility boundaries support coordinated development of APIs, interfaces and event processing.

What we build

• APIs and business logic for SaaS, customer workspaces and internal systems.

• External integrations, webhooks and event processing.

• Background jobs and long-running workflows with explicit states.

• Data validation, access control, logging and error visibility.

How we approach delivery

We start with user scenarios, API contracts and the data model. We separate immediate operations from background work and define integration behaviour for repeated requests, unavailable services and delivery failures. Verification covers permissions and recovery paths as well as successful operations.

What determines the cost

Estimates depend on business rules, integrations, load requirements, existing code and testing scope. An initial review establishes deliverables, acceptance criteria and release order. A product description and its main scenarios are enough to begin discussing business system development or improvements to an existing application.