Saikyou Kenshi, Saiteihen Kishidan de Funsenchuu: Orc wo Chi no Hate made Oitsumete Zettai ni Shimatsu suru dake no Kantan? na Oshigoto desu

The "Anti Foreign Dangerous Species Knights" was formed to protect the people from dangerous monsters, however this is more of a black company and it's only a knight order in name only...! Orcs that keep coming like pests no matter how many times they are taken down... salaries that don't increase at all... quirky co-workers... This is the story of the strongest swordsman of a commoner background, who works hard everyday cutting orc's heads in the lowest knight order which is ridiculed as "Pig Hunters."

(Source: Micro Magazine-sha, translated)