The management professor Peter Drucker credits Kafka with developing the first civilian hard hat while employed at the Worker's Accident Insurance Institute, but this is not supported by any document from his employer.   His father often referred to his son's job as an insurance officer as a Brotberuf , literally "bread job", a job done only to pay the bills; Kafka often claimed to despise it. Kafka was rapidly promoted and his duties included processing and investigating compensation claims, writing reports, and handling appeals from businessmen who thought their firms had been placed in too high a risk category, which cost them more in insurance premiums.  He would compile and compose the annual report on the insurance institute for the several years he worked there. The reports were received well by his superiors.  Kafka usually got off work at 2 ., so that he had time to spend on his literary work, to which he was committed.  Kafka's father also expected him to help out at and take over the family fancy goods store.  In his later years, Kafka's illness often prevented him from working at the insurance bureau and at his writing. Years later, Brod coined the term Der enge Prager Kreis ("The Close Prague Circle") to describe the group of writers, which included Kafka, Felix Weltsch and him.  
Or is philosophical/political analysis more your style? You're covered. Other critics point to Kafka's readings of Sigmund Freud, Karl Marx, and Friedrich Nietzsche as a way into the complex philosophical themes of this warped little fairy tale. Gregor's conflict with his father and the dream-like quality of the story is seen as a nod to both Freud's analysis of dreams and the Oedipal complex. A Marxist would read Gregor's inability to work as a protest against the dehumanizing and self-alienating effects of working in a capitalistic society. And others view Gregor's monstrous insect form as representing Gregor's radical refusal to submit to society's values and conventions, much in the same way as the Nietzschean Übermensch .
One night, the boarders invite Grete to play violin for them in the main room. Gregor is enthralled with Grete's playing, and creeps out into the middle of the room, in full view of all the spectators. At first amused, then horrified, the boarders declare that they intend to move out the next day without paying any rent. After the boarders retreat, the family confers. Grete insists that Gregor must be gotten rid of at all costs. Gregor, who is at this point still lying in the middle of the room, makes his way back into his room. Famished, exhausted, and depressed, Gregor dies early the next morning.