# nautilus-system
[](https://github.com/nautechsystems/nautilus_trader/actions/workflows/build.yml)
[](https://docs.rs/nautilus-system/latest/nautilus-system/)
[](https://crates.io/crates/nautilus-system)

[](https://discord.gg/NautilusTrader)
System-level components and orchestration for [NautilusTrader](https://nautilustrader.io).
The `nautilus-system` crate provides the core system architecture for orchestrating trading systems,
including the kernel that manages all engines, configuration management,
and system-level factories for creating components:
- `NautilusKernel` - Core system orchestrator managing engines and components.
- `NautilusKernelConfig` - Configuration for kernel initialization.
- System builders and factories for component creation, including caller-supplied clock construction for live/sandbox systems.
## NautilusTrader
[NautilusTrader](https://nautilustrader.io) is an open-source, production-grade, Rust-native
engine for multi-asset, multi-venue trading systems.
The system spans research, deterministic simulation, and live execution within a single
event-driven architecture, providing research-to-live semantic parity.
## Feature flags
This crate provides feature flags to control source code inclusion during compilation:
- `streaming`: Enables `persistence` dependency for streaming configuration.
- `python`: Enables Python bindings from [PyO3](https://pyo3.rs) (auto-enables `streaming`).
- `defi`: Enables DeFi (Decentralized Finance) support.
- `live`: Enables live trading mode dependencies.
- `tracing-bridge`: Enables the `tracing` subscriber bridge for log integration.
- `extension-module`: Builds as a Python extension module.
## Documentation
See [the docs](https://docs.rs/nautilus-system) for more detailed usage.
## License
The source code for NautilusTrader is available on GitHub under the [GNU Lesser General Public License v3.0](https://www.gnu.org/licenses/lgpl-3.0.en.html).
---
NautilusTraderâ„¢ is developed and maintained by Nautech Systems, a technology
company specializing in the development of high-performance trading systems.
For more information, visit <https://nautilustrader.io>.
Use of this software is subject to the [Disclaimer](https://nautilustrader.io/legal/disclaimer/).
<img src="https://github.com/nautechsystems/nautilus_trader/raw/develop/assets/nautilus-logo-white.png" alt="logo" width="300" height="auto"/>
© 2015-2026 Nautech Systems Pty Ltd. All rights reserved.