# Testing & QA > Selected Engineer ApS work demonstrating Testing & QA — the achievements that prove it. - [Replaced 27 rendered font sizes whose nearest neighbours were 0.6% apart with a six‑step Major Third scale, and wrote the linter that fails the twenty‑eighth.](https://brand.engineer.company/portfolio/replaced-27-font-sizes-with-a-six-step-scale-129/) - [Closed the colour system at 28 documented colours with a linter that fails a value painted but undocumented, documented but unpainted, mis‑measured, respelled as a literal, or within a perceptual distance of 0.02 of one already there.](https://brand.engineer.company/portfolio/closed-the-colour-system-at-28-colours-133/) - [Fixed a sitemap where 172 of 176 URLs shared one modification timestamp, by taking the date from git history after establishing that the export rewrites every file on every run.](https://brand.engineer.company/portfolio/fixed-a-sitemap-with-one-shared-timestamp-140/) - [Built a 48‑token design system on the platform's own glass material and wrote the linter that rejects a magic number, a hardcoded font size, or an animation that ignores the reduce‑motion preference.](https://brand.engineer.company/portfolio/built-a-48-token-design-system-160/) - [Built the company's icon and favicon sets from two hand‑made drawings, with every derived asset regenerated by script and a check that fails when a derived file was committed before its source.](https://brand.engineer.company/portfolio/built-the-visual-identity-from-two-drawings-164/)