Chris Lorenzo
Web Performance Specialist
Distinguished Engineer with deep expertise in JavaScript, React, and TypeScript. I help teams ship fast, resilient, and accessible experiences at scale.
About Me
Senior web performance engineer and engineering leader focused on shipping fast, resilient, and accessible experiences at scale. I’ve led teams and projects across TV apps, media, and the modern web — mentoring developers, setting performance guardrails, and delivering measurable wins on Core Web Vitals. Invited public speaker at many conferences, including talks for Google and The Lead Developer.
Quick Facts
Expertise
- Web Performance, Core Web Vitals, Lighthouse
- JavaScript, TypeScript, React, Tailwind, Solid, Web Components
- Node.js, SSR/SSG, CDN & caching strategies
- DX, tooling, CI/CD, observability
Leadership
Built and led teams delivering high‑impact, high‑availability experiences. Passionate about mentoring and raising the bar for performance culture.
Community
Co‑Chair, W3C Media & Entertainment Group
Awards
Comcast Circle of Success (2021) — Xfi Group
Patents
- Display Screen Or Portion Thereof With Animated GUI (US D992573, 2023)
- Systems and methods for on‑network device identification (US 20200036716 A1, 2022)
Location
Philadelphia, PA (open to remote/US time zones)
Skills
I focus on measurable performance outcomes and a pragmatic developer experience. Here are my core strengths.
Web Performance
Core Web Vitals, Lighthouse, bundle optimization, code‑splitting, lazy‑loading, image strategy, caching, and observability.
Frontend Engineering
JavaScript/TypeScript, React, Solid, Web Components, accessibility, SSR/SSG, routing and data‑fetching strategies.
Platforms & DX
Node.js, build systems, CI/CD, linting and formatting, performance budgets, automated checks, and robust review workflows.
Experience
Selected experience leading performance-focused engineering across TV apps, media, and the modern web.
Key Achievements
- Led integration of SolidJS with Lightning for next‑generation set‑top box at MultiChoice (South Africa)
- Built Vue.js + Lightning integration for Sky Media
- Guided teams on performant patterns for low‑powered devices and TV environments
Comcast
Distinguished Engineer — Lightning Team
Key Achievements
- Pioneered SolidJS and Vue.js integrations for Lightning 3 in under a month
- Drove creation of a high‑performance Lightning component library powering 100+ applications
- Championed Lightning 3 adoption via internal strategy, talks, and community content (incl. Ryan Carniato’s channel)
- Contributed to Xumo Play and Sky TV app teams to align delivery with user and business needs
- Delivered talks on PWAs, Solid as a universal renderer, and Web Performance Optimization at major conferences
- Designed onboarding/training for Lightning, accelerating developer ramp‑up
- Built Voice Guidance and accessibility components to improve inclusivity
Key Achievements
- Led Smart Internet project and recruited/mentored a team of 10+ engineers; improved hiring processes
- Implemented Implicit OAuth; collaborated to add CORS in API gateway enabling unified front‑end access
- Eliminated Rails middleware and simplified deployments (cut from 1 hour to ~30 seconds)
- Removed Ruby proxy middleware — saved millions in server costs and established a new app pattern
- Redesigned universal Polaris navigation to static, reducing hosting costs by ~90%
- Founded ‘Comcast Day’ career program for 100 high‑school students at Comcast Center (NFCS)
Key Achievements
- Led front‑end engineering across multiple initiatives; mentored engineers and standardized patterns
Key Achievements
- Drove modern JavaScript adoption and helped establish a performance‑minded engineering culture
Technical
Technologies and strengths I apply to deliver fast, resilient experiences — especially on constrained and low‑powered devices.
Languages
Frameworks & Libraries
Architecture & State
Tooling & Build
Performance & DX
Let's Connect
Reach out for performance reviews, Core Web Vitals improvements, TV app and media platform consulting, or Workshops and talks.
GitHub
github.com/chiefcllLocation
Philadelphia, PA