I’d say a safe bet is Javascript, there are plenty of online resources, good courses online and whatnots. Although it’s true that self learning is possible, I guess the _fastest_ way would be to join few coding meet-ups (there are many here in London and they are free) and learn together with other people.

They should keep a blog/github with their progress too. They basically need to prove they can “do”, having a CV saying “Javascript: 3 month online course” won’t work.

Are they prepared to move away from Barcelona or Vienna? Cities like London and Berlin are great place to look for a job in IT.

best of luck