Kevacoin uses Proof-of-Work as its consensus method. The hashing algorithmn is Cryptonight R (variant 4). The existing Cryptonight miners (e.g. XMRig) are compatible with Kevacoin, as long as they support Cryptonight R.
Even though Kevacoin is based on Bitcoin/Litecoin, we slightly modified the header structure to make it compatible with Monero mining software. As a result, one can use any Monero mining software to mine Kevacoin (e.g. XMRig or XMR-Stak).
We provide a reference implementation of Kevacoin mining stratum keva-stratum based on monero-stratum. It is easy to build from source code on Linux and macOS. For Windows, we provide a pre-built binary.