# UI/UX Design & Design Systems > Selected work demonstrating this service. - [Presented 200 UI/UX improvements for the GIS map application, boosting revenue by 10x through enhanced software features.](https://engineer.company/portfolio/presented-200-ui-ux-improvements-for-the-gis-28/) - [Contributed to user interface design processes, ensuring intuitive, visually appealing, and user‑friendly project interfaces.](https://engineer.company/portfolio/contributed-to-user-interface-design-processes-ensuring-intuitive-36/) - [Designed 30 websites, delivering unique and flexible solutions by converting Photoshop designs to HTML.](https://engineer.company/portfolio/designed-30-websites-delivering-unique-and-flexible-solutions-52/) - [Designed an iOS 26 'Liquid Glass' design system and a canonical component inventory enforced by lint rules to prevent UI divergence.](https://engineer.company/portfolio/designed-an-ios-26-liquid-glass-design-system-75/) - [Designed the product's UI and UX end to end — directory grids, dual card/table views, live requirement validators and breadcrumb navigation.](https://engineer.company/portfolio/designed-the-product-s-ui-and-ux-end-76/) - [Maintained and enhanced the legacy Hugo static‑site website while contributing UI/UX improvements to the primary asset‑management product.](https://engineer.company/portfolio/maintained-and-enhanced-the-legacy-hugo-static-site-87/) - [Drove client web success by combining custom website development and design with SEO, content strategy and copywriting.](https://engineer.company/portfolio/drove-client-web-success-by-combining-custom-website-91/) - [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://engineer.company/portfolio/replaced-27-font-sizes-with-a-six-step-scale-129/) - [Took WCAG 2.2 Level AA across 32 representative pages — one per template per language — in both colour themes, plus two AAA criteria, with a documented conformance record and a check defending each claim.](https://engineer.company/portfolio/took-wcag-2-2-level-aa-across-the-whole-site-130/) - [Found and fixed 11 accessibility defects the browser reported as healthy — eight footer links still in tab order behind pointer‑events, a scroll timeline clipping the colophon off three pages, and a rule engine running 70 of its 105 rules.](https://engineer.company/portfolio/fixed-11-accessibility-defects-the-browser-called-healthy-131/) - [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://engineer.company/portfolio/closed-the-colour-system-at-28-colours-133/) - [Found that the light theme had been missing a full‑page overlay layer since the day it was written, by asserting that both themes paint every layered surface with the same number of layers.](https://engineer.company/portfolio/found-the-light-theme-missing-an-overlay-layer-134/) - [Made reduced‑motion honest after finding eleven selectors still animating under the preference, because a universal transition‑none rule loses on specificity to any rule carrying a class.](https://engineer.company/portfolio/made-reduced-motion-honest-135/) - [Built a 637‑line print stylesheet against four documented rendering‑engine behaviours, including run‑in headings that printed white on white for any reader whose browser preferred dark.](https://engineer.company/portfolio/built-a-637-line-print-stylesheet-136/) - [Established PDF/UA‑1 conformance across nine documents at 106 of 106 rules, and found the archival variant failing one rule of 146 — a near‑miss that reads as a pass to anyone not running the validator.](https://engineer.company/portfolio/established-pdf-ua-1-conformance-across-nine-documents-146/) - [Built a native macOS messaging client in Swift 6 and SwiftUI — 11,141 lines across 53 files — over the C interface of a Rust core linked as a static archive from a pinned revision.](https://engineer.company/portfolio/built-a-native-macos-messaging-client-in-swift-6-154/) - [Named every icon‑only control in the interface for screen readers after finding the send button announced as "arrow up circle, button", and wrote the linter that requires the label within eight lines of the icon.](https://engineer.company/portfolio/named-all-seventeen-interface-icons-for-screen-readers-159/) - [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://engineer.company/portfolio/built-a-48-token-design-system-160/) - [Rewrote the application's error messages against a written tone standard after a refused sign‑in blamed the user for mistyping when the provider actually required an app‑specific password, and covered it with a test that names the provider.](https://engineer.company/portfolio/rewrote-the-error-messages-against-a-tone-standard-162/) - [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://engineer.company/portfolio/built-the-visual-identity-from-two-drawings-164/)