How can I see my job in relation to Krishna?
In the material world there's always some good thing and some bad thing. Nothing is perfect. We should see Krishna's hand in everything and accept it as His mercy. In this way we can be peaceful even in difficulty.
Offer everything to Krishna by offering the fruits of your work - and everything - to Him. Think that each thing you have has been given to you by His mercy and should be used for His pleasure as much as possible. Go to the temple regularly if at all possible, take the association of sincere devotees, give in charity, live simply, study shastra (scripture) and chant. These things will help you.
As far as "work-related prayers," you can try this one: "My dear Lord, by Your kindness You have given me this job. It is by Your mercy I have anything and therefore I will try to use whatever I can in Your service. I am small and insignificant but by Your mercy even a blind man can see, a lame man can climb mountains and a dumb man can speak excellent poetry. I am falling at Your feet and trying to be a humble servant. Please protect me and give me shelter."