See the introduction for contributors and Contributing Guidelines.
If you're just starting, we have labeled some issues as a good first issue. If no one else has indicated they're working on it, please leave a comment saying you're interested, and feel free to get started right away!
Check out our Development Roadmap to see our plans and priorities for upcoming releases.
For translators, see the Translator Guide to learn how to get started with SecureDrop translations in our translation portal.
We also have a public Gitter channel and a public Discourse forum where you can discuss SecureDrop and ask questions.