This method of prototyping is called Dead Bug construction. As the name implies, the finished results aren't very pretty and often resemble a dead bug.
You’ll need a fine tipped soldering iron, steady hands and basic soldering skills.
Keep in mind that you don’t have to dead bug the circuit. Prototyping or perf board can be used for the final circuit, or just keep it on the half-size breadboard that you tested it on.