# For Developers

- [Basics](https://docs.pinot.apache.org/release-0.9.0/developers/developers-and-contributors.md)
- [Extending Pinot](https://docs.pinot.apache.org/release-0.9.0/developers/developers-and-contributors/extending-pinot.md)
- [Writing Custom Aggregation Function](https://docs.pinot.apache.org/release-0.9.0/developers/developers-and-contributors/extending-pinot/custom-aggregation-function.md)
- [Segment Fetchers](https://docs.pinot.apache.org/release-0.9.0/developers/developers-and-contributors/extending-pinot/segment-fetchers.md)
- [Contribution Guidelines](https://docs.pinot.apache.org/release-0.9.0/developers/developers-and-contributors/contribution-guidelines.md)
- [Code Setup](https://docs.pinot.apache.org/release-0.9.0/developers/developers-and-contributors/code-setup.md)
- [Code Modules and Organization](https://docs.pinot.apache.org/release-0.9.0/developers/developers-and-contributors/code-modules-and-organization.md): TODO: Deprecated
- [Update Documentation](https://docs.pinot.apache.org/release-0.9.0/developers/developers-and-contributors/update-document.md)
- [Advanced](https://docs.pinot.apache.org/release-0.9.0/developers/advanced.md)
- [Data Ingestion Overview](https://docs.pinot.apache.org/release-0.9.0/developers/advanced/data-ingestion.md)
- [Ingestion Transformations](https://docs.pinot.apache.org/release-0.9.0/developers/advanced/ingestion-level-transformations.md)
- [Null Value Support](https://docs.pinot.apache.org/release-0.9.0/developers/advanced/null-value-support.md)
- [Advanced Pinot Setup](https://docs.pinot.apache.org/release-0.9.0/developers/advanced/advanced-pinot-setup.md)
- [Plugins](https://docs.pinot.apache.org/release-0.9.0/developers/plugin-architecture.md)
- [Write Custom Plugins](https://docs.pinot.apache.org/release-0.9.0/developers/plugin-architecture/write-custom-plugins.md)
- [Input Format Plugin](https://docs.pinot.apache.org/release-0.9.0/developers/plugin-architecture/write-custom-plugins/record-reader.md)
- [Filesystem Plugin](https://docs.pinot.apache.org/release-0.9.0/developers/plugin-architecture/write-custom-plugins/pluggable-storage.md)
- [Batch Segment Fetcher Plugin](https://docs.pinot.apache.org/release-0.9.0/developers/plugin-architecture/write-custom-plugins/write-your-batch.md)
- [Stream Ingestion Plugin](https://docs.pinot.apache.org/release-0.9.0/developers/plugin-architecture/write-custom-plugins/write-your-stream.md): This page describes how to write your own stream ingestion plugin for Pinot.
- [Design Documents](https://docs.pinot.apache.org/release-0.9.0/developers/design-documents.md): Links to all the design docs
- [Segment Writer API](https://docs.pinot.apache.org/release-0.9.0/developers/design-documents/segment-writer-api.md)


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