KarlHorning.dev - Building a Modern, Accessible Developer Portfolio
A TypeScript-based Next.js portfolio focused on accessibility, performance, and clean documentation.
Building accessible products for real people
I ship practical, human-centred solutions with performance and a11y in mind.
Accessibility-first
WCAG-aware design, keyboard and screen-reader friendly.
API-driven
REST/GraphQL, typed clients, tests and docs.
EdTech expertise
LTI/SCORM integrations, institutional APIs, and HE-scale deployment.
Performance & DX
Vite/Next.js, sensible tooling, CI and quality gates.
Skills
Available for workJavaScript
Node.js
React
GraphQL
SQL
Tailwind
My projects
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Learnlight Platform & Mobile Apps
Full-Stack JavaScript Developer (Backend Focus) at Learnlight (2021-2024). Built and optimised the Apollo-based GraphQL API powering Learnlight's global learning platform, improving scalability, reliability, and developer efficiency for 700k+ registered learners across 180+ countries.
From the blog
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Testing My Portfolio for Accessibility: What axe-core Found (and What It Didn't)
| 6 min read
What happened when I added Playwright and axe-core to my portfolio site — the structural issues that surfaced, how I fixed them, and what automated testing still missed.
Web Accessibility Resources and Tools: Guidelines, Checklists, and Testing Solutions
| 7 min read
A reference list of web accessibility tools, guidelines, and articles — with starred items for quick starting points.
Let's collaborate
Open to freelance projects, consultancy, or a full-time role in EdTech, accessibility, and full-stack development.