NELOdev

Django and Python web development for business applications.

Focused backend work, APIs, integrations, and data-focused web applications.

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Services

  • Django backend development.

    Build and extend backend functionality for business web applications.

  • REST APIs and integrations.

    Design and implement Python and Django APIs that connect services and support structured workflows.

  • Data-focused web applications.

    Create Django-based interfaces for structured data, workflows, and internal tools.

Selected engineering work

SlotBook: API engineering demonstrator

A self-initiated API-only reference implementation for appointment and service-slot booking, built with Django REST Framework.

The demonstrated workflow covers Provider-owned services and time slots, Customer availability discovery, and capacity-one booking.

OpenAPI and Swagger documentation make the API surface available for inspection.

Diagram from a Provider-owned service and slot through Customer availability discovery to booking success and a competing-booking conflict.
Demonstrated workflow: HTTP 201 success followed by HTTP 409 slot_already_booked conflict.

A successful booking returns HTTP 201.

A competing request for the same slot returns HTTP 409 with the error code slot_already_booked.

Swagger UI overview showing the SlotBook API title, OpenAPI link, authentication, booking, health, and Provider operation groups.
SlotBook exposes a bounded API-only workflow through generated Swagger documentation.
Swagger response table showing one synthetic Provider service named Demo consultation and HTTP 200.
Provider service inspection returns the owned synthetic service.
Swagger response table showing one future synthetic slot with available status and HTTP 200.
Customer availability discovery returns an available future slot.
Swagger response table showing a confirmed synthetic booking and HTTP 201.
The first booking for an available slot is confirmed with HTTP 201.
Swagger response table showing HTTP 409 and the error code slot_already_booked.
A competing request for the same slot is rejected deterministically.
Swagger response table showing HTTP 200 and the readiness body status ready.
The local readiness endpoint reports the demonstrator is ready.

All data shown in this demonstration is synthetic.

This is a demonstrator, not client work or a production booking product.

View the public SlotBook source repository

About

NELOdev focuses on Django and Python web development for business applications.

The offer is centered on backend functionality, APIs, integrations, and data-focused web applications.

Have a Django or Python web project to discuss?

Send a short note with what you are building, what is blocked, and what help you need.

Discuss a project info@nelodev.ee