Susie Lu is a painter who engineers charts so good you forget charts are usually bad

Think about the last chart that actually helped you. Not the last chart you saw, the last one that made something click. There is a decent chance the legend on it, or the neat little annotation pointing at the spike, exists because of Susie Lu. She is the rare engineer whose open-source side projects became infrastructure for an entire discipline.

Her official job is senior data visualization engineering at Netflix, where the data is measured in absurdities and the audience ranges from analysts to executives with ninety seconds. Her actual job, as far as we can tell, is making complexity feel polite. That skill does not come from a bootcamp. She is also a painter and a designer, and it shows in everything she ships.

The libraries everyone uses and nobody thanks

In d3, the visualization library that powers most serious charting on the web, two chores made grown developers cry: legends and annotations. Susie fixed both. d3-legend turns a scale into a proper legend in a few lines. d3-annotation, and its React sibling, gave the field a clean grammar for labels, callouts, and 'look here' arrows: a subject, a connector, a note. Simple to say, brutal to design, and she designed it.

That annotation work is quietly radical. Most tools treat labels as an afterthought you sprinkle on at the end, and most charts are worse for it. Susie's whole argument, delivered in talks with titles like 'How to Annotate Like a Boss,' is that the annotation is often the entire reason the chart exists. The data shows what happened. The annotation says why you should care.

At Netflix she runs the full process: stakeholder interviews, sketches, prototypes, iteration, the works. Design rigor applied to internal tools, which is roughly as rare as it sounds.

Craft over dashboards

The data world is drowning in dashboards nobody reads, autogenerated by tools nobody loves. Susie Lu's work is the counterargument: visualization as a designed artifact, where every legend, label, and color earns its place. It is the difference between a spreadsheet with opinions and an actual explanation.

Start at susielu.com, poke through the d3-annotation demos, and watch one of her talks. Fair warning: you will never look at a default chart legend the same way again, and your coworkers' dashboards are about to disappoint you profoundly.