Please take a look at https://polkadot.io/
Polkadot technology consists of a number of components which are being currently implemented here in the Parity repository. Look for "easy" and "mentor" issue tags to get started.
- Wasm backend
- Secret Store and Signer
- Bridge
- Consensus: Validity / Availability demo
- Light client proofs
Please find further information at https://polkadot.io/#how-is-going