Oddjob's hand as Bond gets champagne (Dramatic irony)
When Bond goes to get another bottle of Dom Perignon, he is excited and happy. As he reaches into the fridge, we see Oddjob's hand behind him, but he has no idea. In seconds, Oddjob has knocked Bond unconscious. The time lag between our seeing the assailant's hand and Bond realizing there's someone behind him accounts for an instance of dramatic irony, which heightens the suspense of the scene.
Bond's associates opting not to help him (Dramatic Irony)
While Bond is on his mission to dismantle Goldfinger's plan, his associates in the CIA discuss whether they should send in reinforcement. Each time they discuss it, they end up deciding that Bond is better off sorting through things on his own. Even though Bond is highly competent, he finds himself out of his depth at certain points and could use some extra help. Thus, while we the viewer know that Bond needs some help, Felix and M. do not, which accounts for some instances of dramatic irony.
Bond slipping a note into Solo's pocket (Dramatic Irony)
In an effort to reach out to his associates in the CIA, Bond slips a note outlining Operation Grand Slam with a tracking device into Solo, one of the mobster's pockets. While Goldfinger and Solo do not see the maneuver, the viewer does, and it gives the viewer hope that Bond will be able to contact his coworkers and foil the plan for Operation Grand Slam. Unfortunately, this plan goes awry when Oddjob kills Solo and puts him in a trash compactor.
Pussy switches teams (Situational Irony)
When Bond first meets Pussy Galore, she tells him she is immune to his charms, and she exhibits a steely reserve around his more charming moments. It is even implied, though not explicitly stated, that she prefers the company of women. Then, when Goldfinger tells her to seduce Bond, she ends up getting seduced herself, and the two have a fling that leads her to change her plans and work for the American government. The next day, she has her Flying Circus only pretend to release deadly nerve gas on the Fort Knox depository, and instead helps the American troops apprehend Goldfinger. Ironically enough, the woman most "immune" to James Bond ends up getting swayed to change her alliances by the end of the film.
