Hi Marko,
the photo is by far not the most important thing on a CV. A shirt + long hair + a neat look should really be ok.
job interview
it depends - I personally would recommend wearing a suit, but cloth pants/suit pants + shirt are definitely fine too.
As long as you look cultivated, long hair is not a problem for a male IT expert (for female definitly not).
And I would wear clothes for the job interview that make me feel professional and comfortable. A tie is not needed - and for the rest I would say it depends a little bit on the job.
When applying as a programmer, you could dress a little bit less formal than as a project manager. And for an interview for a software company I would dress other than for an interview for a financial institute...
IT business in Vienna is more or less the same as everywhere else 
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