Services
Backend & integrations
APIs, data and external systems in one working process.
I build server-side logic for web products, applications and internal systems. First we define the data model, permissions and business rules: who can perform an action, what success means and how the system handles retries or an unavailable external service.
What the work covers
- REST APIs and WebSocket for web and mobile interfaces
- CRM, payment and back-office integrations
- Data modelling, authentication and access control
- Queues, background jobs and event processing
Who this fits
- A product with accounts, roles and business logic of its own
- Several services with gaps in the flow of data between them
- An existing backend that needs a reasoned development plan
Stack
- TypeScript
- NestJS
- Go
- Python
- PostgreSQL
- Redis
What moves the price
- Number of workflows and external APIs
- Complexity of data, permissions and migrations
- Load, availability and observability requirements
What you keep
- Source code and the agreed data model
- API documentation and environment configuration
- Checks for failures, retries and critical operations