A Migration of Unprecedented Scale
Automattic has confirmed that Tumblr will be rebuilt on WordPress infrastructure. The company openly acknowledges the magnitude of the task: Tumblr currently hosts more than half a billion blogs, placing this among the largest technical migrations in internet history. Given that WordPress already powers roughly 40% of all websites according to W3Techs, folding Tumblr into that ecosystem will only extend the platform's reach further.
The announcement has drawn predictable skepticism, with some observers questioning whether the move is more marketing than engineering. But there's a reasonable case that this is a genuine effort to modernize a platform that many still associate with the early Flickr era. Tumblr's original appeal was its embrace of varied post formats—a concept that never quite became a first-class WordPress feature, remaining instead an opt-in theme option. Tumblr demonstrated that blogging need not be a reverse-chronological feed; the format of a post and how it's written can matter as much as when it was published.
Building the Team
With tech hiring still tight, Automattic is actively recruiting engineers specifically for the Tumblr migration. The work sits at an unusual intersection: it touches two of the most influential blogging platforms in existence simultaneously. The project carries echoes of other massive open-source redesigns, where shipping a major update to a widely used system creates rare learning opportunities for the engineers involved.
That said, the company is not sugarcoating the difficulty. Automattic's own communications describe the effort as tough, and anyone joining should expect a hard engineering problem rather than a routine platform swap. The scale alone—hundreds of millions of blogs, each with its own data, themes, and user expectations—demands careful planning and execution.
