Did Saint Paul see Jesus after the Resurrection?

Yes, Paul did see Jesus after the Resurrection. Acts 9 and Acts 22 document the first encounter of Paul with Jesus after the Resurrection.

Saul was on his way to Damascus when suddenly “a light from heaven flashed about him” (Acts 9), Jesus then revealed his name to Saul. Acts 22 also recounts this event when Paul said, “About noon as I came near Damascus, suddenly a bright light from heaven flashed around me. I fell to the ground and hears a voice say to me, ‘Saul! Saul! Why do you persecute me?’” (Acts 22:6).