I have lots of experience developing bukkit/spigot plugins in the past, for example I made a custom game mode and lots of smaller plugins for a server around 2 years ago, before I got a bit tired of the game. Now I have become interested again in Minecraft development. I also have lots of experience playing the game, on multiple servers, so I have a good knowledge of what I (and other players) will find fun to play. I will work with you to implement the custom feature and make the plugin unique so your server will stand out while also providing a familiar sky wars experience for the players.