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Claudius Lai — Frontend Engineer

5+ years building React, Next.js, and generative-AI products at major tech and e-commerce platforms. Open to UK, remote, and global opportunities.

Full and independent UK working rights — no sponsorship required.

Frontend Engineer · Generative AI · UI/UX

FrontendReactNext.jsTypeScriptReact NativeTailwindJest
Backend & InfraNode.jsGraphQLAWSGCPVercelDockerContentful

Selected Impact

  • Built a 0-to-1 generative-AI agent application as sole frontend engineer — full client-side architecture, complex async state, and interactive chat surfaces at enterprise scale.
  • Designed Claude Code automation workflows that lifted team PR throughput; presented quarterly internal seminars on generative-AI integration patterns to the wider engineering org.
  • Acted as product team's security liaison to the central security division — monitoring and patching vulnerabilities across 100+ code repositories.
  • Led PHP-to-React and WordPress-to-headless CMS migrations (+30% workflow efficiency).
  • Drove Magento 1 → Magento 2 platform migration (30% faster page loads, 10% checkout-conversion uplift).
  • Delivered +20% engagement and +15% page-performance gains across e-commerce and digital-marketing surfaces.
  • Maintained high-traffic React (TypeScript) features for a major e-commerce platform via global recruitment placement.

Core Stack

React ecosystem delivery across web and app surfaces: React, Next.js, React Native, and TypeScript, with Tailwind CSS, headless CMS integration, and technical SEO implementation.

How I Work

Agile / Scrum delivery with rigorous code reviews and comprehensive test coverage (Jest, Mocha). Comfortable owning solo 0-to-1 builds and collaborating in cross-functional teams across product, design, and business stakeholders.

Credentials

  • AWS Certified Machine Learning Engineer (Associate), AI Practitioner, Cloud Practitioner
  • Google Cloud Professional Machine Learning Engineer, Professional Cloud Architect, Cloud Digital Leader, Gemini Certified Educator
  • Fundamental Information Technology Engineer Exam, Japan
  • BSc(Hons) Computing, The Hong Kong Polytechnic University
  • BA(Hons) Photography, Falmouth University — visual / interaction taste informs the UI/UX focus
  • JLPT N1, BJT 517
  • Quadrilingual (English, Cantonese, Japanese, Mandarin)

For selected technical background or collaboration discussions, please use the contact form.

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