Europe's tech industry is witnessing a troubling resurgence of 'bro culture' that's reshaping startup ecosystems from London to Berlin. After a brief period of diversity-focused humility following the 2021 tech crash, hackathons and AI swagger are back with a homogeneous crowd dominating the narrative. The shift marks a return to exclusionary practices that many thought had been left behind.

LinkedIn feeds now overflow with 996 work culture rhetoric and ARR boasts, while prominent tech podcasts feature minimal female representation. Industry insiders report that hackathons have returned with renewed vigor, though women still make up only 30% of participants. The revival coincides with broader political shifts, particularly Donald Trump's return to power in the US, which has emboldened figures like Elon Musk to champion contrarian, loud personalities over introspection.

This cultural regression carries serious business implications. Monocultures produce products that alienate diverse users, while the relentless 996 lifestyle threatens founder burnout. Some women in tech report feeling pressured to abandon diversity initiatives as the ecosystem rewards conformity over inclusion. Yet the same homogeneity creates opportunities for those with "taste, originality and emotional intelligence" to identify market gaps that the mainstream crowd misses. The question now is whether Europe's tech sector will recognize that sustainable innovation requires more than just the boys being back.