Android Security SDK Developer

Building authentication SDK with Android Keystore/StrongBox, Play Integrity API, and passwordless login for security infrastructure product.

Fixed-price project ($12-20K range) + ongoing monthly retainer.

Requirements:
- Native Kotlin/Java development
- Android Keystore/StrongBox + Play Integrity API
- SDK/library development (must have published work)
- CI/CD automation (GitHub Actions)
- Security mindset

Please review attached PDF carefully before applying:

- Complete technical requirements
- Full scope (Core SDK + Passwordless + CI/CD)
- Portfolio requirements
- How to structure your proposal

Looking for partnership approach, not transactional contractor.