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kgrzybek/modular-monolith-with-ddd

This system is a modular monolith application for managing meetings, groups, and payments, built on a Domain-Driven Design architecture. It provides comprehensive APIs for creating and managing meetings, handling user registrations and authentication, and processing subscription payments and fee collections. The system enforces strict access controls, event-driven consistency via outbox/inbox patterns, and automated background processing for subscriptions and internal commands.

64.0

Adequate · 5 August 2026

24k

lines of production code

C#

primary language

1

bus factor · 35 authors in all

4

measurements over time

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How it got here

2019 · Modular monolith implementation

The project established a modular monolith architecture with distinct modules for Administration, Meetings, Payments, and UserAccess, each containing domain, application, and infrastructure layers. This period focused on implementing core domain models, application commands/queries, and API endpoints while introducing architectural tests to enforce module isolation and clean code standards.

74 changes

2020 · Domain-driven architecture and payment features

This period focused on establishing a modular, event-sourced architecture across the Payments, Meetings, and Administration modules, introducing command/query handlers, outbox/inbox processing, and background job scheduling. It also implemented core business capabilities for subscription management, pricing, and meeting interactions, supported by comprehensive integration and unit tests.

99 changes

2021–2024 · User and registration infrastructure

This period focused on establishing the core application and data layers for user management and registration workflows. The team implemented the Nuke build system to streamline development and CI processes, while simultaneously introducing database schemas and application modules to support user accounts, admin creation, and email-based registration confirmation.

4 changes

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About this page

  • The description of this project is derived from its own commit history, not from its README.
  • The score is its highest published measurement, taken on 5 August 2026 at a pinned commit. It is not a live figure and does not change until the project is measured again.
  • Measured at commit 91c8ef24b4 — the exact code this score is about.
  • Scored under rubric rubric-2026.08.19. Score the same commit under that rubric and you get the same number.
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