English naturally uses the present perfect here: "I have come to work" or even more naturally "I've come to work."
Only a non-native speaker would spontaneously say, "I come to work."
It is important to provide for English as it is actually used, not strictly in word-for-word translation.
For instance, the only time one uses the simple present for everyday actions is when using the present historic to tell a story: "So, I eat an apple. Then, I go to school, and who do I run into? My friend Paul."