About Publicit

Be everywhere. Publicit is the European self-service platform for omnichannel advertising: one dashboard that puts a campaign on connected TV, billboards, digital screens in the street, metro stations, mobile apps and press. Things that used to take three agencies and six weeks now take a few minutes and a work email.

Underneath that simple dashboard sits the hard part, our own hybrid ad exchange. Every time an ad slot opens anywhere in our network, a TV in a living room or a screen in a metro corridor, an auction has to run and finish before anyone notices it happened. Milliseconds. Not "fast for a web app" milliseconds; the kind where garbage collection pauses are a bug, and where a query to a database you didn't need to make is the difference between winning and losing.

Most of the industry solved this by stacking more cloud servers on the problem and accepting the latency. We took the opposite bet: rebuild the decision path from the ground up, in Rust, with hardware acceleration and GPU-based decisioning, so we can afford to actually think about each auction.



Is this ad relevant to this viewer? Is this placement safe for this brand? What is it genuinely worth? All of it in the time most exchanges spend on network overhead alone.

We’re a small engineering team in Barcelona building real infrastructure in a market where most players stopped building years ago. Nobody here is maintaining someone else’s platform.

The role

This role sits across both halves of the company: the exchange that runs the auctions, and the platform our customers actually touch. Very few engineers work across that line. The ones who do end up making the decisions that matter, because nearly every hard question here turns out to be a question about the seam between them.

An advertiser sets a budget in a form. Somewhere downstream that becomes pacing logic in a system with a millisecond budget, and when the two disagree, somebody has to hold the whole picture in their hea

📌 Product Engineer (Bellprat)
🏢 Publicit Global
📍 Bellprat