I have a job that helps people, Jew and non Jew alike. When I help a non jew , should I have kavana to do a chesed? Will this be considered a good deed as well in heaven?
Certainly, you should have intention of helping a fellow human being, which is certainly a positive deed.
With regard to supporting non-Jewish poor, the Rambam (Melachim 10:12) explains that there there is a mitzvah in supporting poor non-Jews, in visiting their sick, and so on, concluding that Hashem is “good to all, and His compassion is upon all creatures” (meaning that we should emulate Him in this matter), and that the ways of Torah are pleasant, and all its paths are peace.
This will apply to your job. You are fortunate that your job allows you to benefit others.