Sure there might be some bias against/for some groups, but everyone knows there's genuses in India and white caucasian flops so they give everyone equal opportunity.
Only exception is for like legal reasons it might be easier to hire some French random low-tier programming over a Russian/Irani genius but that's due to sanctions, but if those same Russian/Irani guys held a western european passport they would gladly just hire them outright.
Source: Venezuelan (sanctions) who is also a holder of a European passport (all sorts of doors just open just because I hold this 2nd nationality out of sheer luck, and you know Venezuelans aren't extremist either).
Additionally, when a woman works with a man on something often the woman's contribution is assumed to be less than the man's contribution if they're listed as co-authors - I would be very surprised if this weren't the case beyond academia but also in artifacts like design docs.
Cold applications are well and good at scale, particularly when combined with custom cover letters. But using your network often yields a faster response. Also, being open to relocation helps.