Staff Fullstack Software Engineer, Core Performance

Role Description As a Staff Software Engineer at Dropbox, youll be the singular technical owner of application performance across the Core org — the part of Dropbox that owns every consumer-facing surface: web, iOS, Android, and desktop

This is one of the companys most visible, cross-cutting technical challenges Your mandate is to make Dropbox feel fast on every surface our customers use Youll operate at the intersection of measurement, engineering, and product impact, owning ambiguous problems that span the entire stack and translate directly into business outcomes for hundreds of millions of users.

There is no existing performance team at Dropbox — youll define the discipline Youll start with the web, profiling our highest-traffic React surfaces, producing flame graphs and heat maps, identifying the most valuable opportunities, and driving fixes through to shipped, measured wins

The web is your initial focus and the surface where youll be most hands-on From there, youll lead the performance initiative across iOS, Android, and desktop by partnering with the internal platform experts who own those clients — coordinating strategy, transferring measurement practices, and driving the work, rather than building everything yourself

Youll also work across the Python and Go backend services that all of these surfaces depend on, since perceived performance rarely lives in one layer.

Your influence will extend across Core Engineering Youll define the measurement standards, regression-detection systems, and performance practices that other engineers rely on

Youll also be expected to use AI fluently in your own engineering work and to lead the optimization of AI-assisted workflows across Core, raising the productivity of every engineer around you

Youll bring clarity where there is uncertainty, raise the bar for engineering excellence through hands-on leadership, and shape how Dropbox thinks about performance for years to come.

In return, youll gain meaningful exposure to senior leadership, build foundational systems that unlock future product capabilities, and grow into an org-level technical strategist — helping advance Dropboxs mission to create a more enlightened way of working.

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