No interview will tell you the future, so to my mind, the only thing the interview can tell you immediately is how much someone knows and whether their personal

No interview will tell you the future, so to my mind, the only thing the interview can tell you immediately is how much someone knows and whether their personality will mesh with the company's culture. In order to ascertain this, I propose job-hiring hackathons. Have the company hold a mini-hackathon, once every 2 weeks or once a month, where all job applicants must show up and work on projects (corporate employees' presence can be optional). Just watch them complete the projects and hire the best candidates.