Make him do side projects, something he can explain and be proud of. Online communities, some github projects he might be interested, ...anything. Let him cont

Make him do side projects, something he can explain and be proud of. Online communities, some github projects he might be interested, ...anything. Let him contribute to something, yes for free, so that potential future coworkers can see 1) who he is, 2) what he can do, 3) how he approaches people.