Work

Case studies,
written around decisions

Each of these is a project where the hard part was framing, evidence or a tradeoff nobody wanted to name. The screenshots matter less than the reasoning, so that's what I've focused on.

01JUL 2025 — NOV 2025 · Shipped

Qatium · Senior Product Designer

A minimum night flow monitor for detecting leakage

Turning an existing data point into an actionable leakage-monitoring workflow.

B2B SaaSMonitoringComplex workflows

Read the case study

02MAY 2026 — AUG 2026 · Shipped

QATIUM · Senior Product Designer / Product Owner

Improving perceived performance

Designing the wait so that heavy hydraulic work felt responsive.

Perceived performanceLoading statesInteraction design

Read the case study

Contact

If any of this is useful, I'd like to hear about it.

Also happy to talk about a specific problem, mentoring, or writing.

Get in touch sofiaroldanjohnson@gmail.com