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We're rebuilding and open-sourcing the world’s software from scratch.

Code for Machine Learning for Trading, 3rd edition — from data sourcing to live execution.

The easiest way to get started with event sourcing in Laravel

A lightweight, opinionated CQRS and event sourcing framework.

Unintrusive Event Sourcing Library for the JVM

Experimental full-stack application showcasing Domain-Driven Design, Microservices, Event Sourcing, CQRS and Angular.

Sekiban - an Opinionated Event Sourcing and CQRS Framework using C#. It can store data into Azure Cosmos DB, AWS Dynamo DB or Postgres

Open-source core banking platform — 61 DDD domains with event sourcing, CQRS, and a schema-first GraphQL API. Multi-asset accounts, exchange, lending, compliance, x402/MPP machine payments, and a non-custodial wallet backend. Laravel 12 / PHP 8.4. Reference implementation: the GCU basket currency.

📲 An agent for sourcing, curating, and scheduling social media posts with human-in-the-loop.

Pragmatic, type safe event sourcing framework for Go.

Self-hosted, enterprise-ready AI workflow orchestration with event sourcing, CQRS, fault tolerance, and observability. Single-binary control plane, Python + Go SDKs, embedded Postgres + NATS for zero-config dev.

Flight booking system built as .NET 10 microservices with Vertical Slice Architecture, DDD, CQRS, Event Sourcing, gRPC, RabbitMQ, Wolverine, PostgreSQL, MongoDB and .NET Aspire.