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Open to senior frontend opportunitiesRemote · United States

Seth Heinzman · Senior Frontend Engineer

I build fast, accessible frontend products.

Five years of professional experience building with React and TypeScript. I lead frontend engineering at Havertys, where I modernize architecture, improve performance and accessibility, and help a six-person team ship reliable customer experiences.

Explore selected workDownload résumé

Impact at Havertys

monthly site users
1.75M
Lighthouse score improvement
30 → 90+
unit-test coverage introduced
80%+
accessibility issues resolved
90%+
Explore the work

Engineering in practice

Selected work.

Real products. Thoughtful interfaces.
The engineering that connects them.

04 case studies
01 / 04Enterprise commerce

Havertys.com

A faster storefront. A stronger foundation.

Leading the frontend behind a complete retail journey, from product discovery to checkout.

Frontend technical lead · six-person engineering team

monthly site users
1.75M
Lighthouse score
90+
unit-test coverage
80%+
  • Preact
  • TypeScript
  • Edge Delivery Services
  • Adobe Analytics
02 / 04Desktop product

BOOST Broadcast Toolkit

Broadcasts, built your way.

A complete broadcast studio that turns live Rocket League data into a polished, customizable show.

Independent product design, architecture, and development

landscape + portrait
2 formats
reactive overlays
Live data
custom theme development
Public SDK
  • React
  • TypeScript
  • Electron
  • Node.js
03 / 04Developer experience

Edge Delivery Services + Vite

Author content. Ship components.

Bringing a modern, typed frontend workflow to Adobe's content-first delivery platform.

Architecture, implementation, and developer documentation

block scripts + styles
On demand
Preact components
Type safe
build + asset delivery
Automated
  • TypeScript
  • Preact
  • Vite
  • Edge Delivery Services
04 / 04Interaction design

RL Replay Draw

Make the next play clearer.

An unobtrusive drawing layer that helps coaches explain the game directly over replay footage.

Independent product design and development

canvas annotations
5 tools
return control to the game
Click through
quick coaching workflows
Global keys
  • React
  • TypeScript
  • Electron
  • Canvas API
Good interfaces start with good foundations.Let’s build both.

Experience

Five years in professional frontend development, from React consulting to leading an enterprise commerce platform.

2023-present

Lead Frontend Developer

Havertys Furniture
Atlanta, Georgia

Technical lead for Havertys.com, responsible for frontend architecture, performance, accessibility, quality, and experimentation across a production platform.

Selected impact

  • Led the replatform from AEM React to Adobe Edge Delivery Services with Preact and TypeScript, simplifying the delivery architecture for a site serving about 1.75M users monthly.
  • Improved Lighthouse scores from roughly 30 to 90+ by addressing Core Web Vitals and the critical rendering path.
  • Led development of complex customer-facing experiences across discovery, product, cart, and checkout flows.
  • Introduced Jest and grew unit-test coverage above 80%, improving release confidence and regression detection.
  • Resolved more than 90% of identified accessibility issues and established reusable UI patterns in Storybook.
  • Mentored three senior engineers on a six-person team while coordinating delivery with product, design, marketing, and backend partners.
  • Preact
  • TypeScript
  • Edge Delivery Services
  • Adobe Target
  • Adobe Analytics
  • Jest
  • Storybook

2021-2023

React Developer, Consultant

PitaTech
Remote

Primary frontend consultant for React applications, translating client requirements into maintainable UI architecture and production releases.

Selected impact

  • Set the frontend architecture and delivery approach for client-facing React applications.
  • Consolidated duplicated pages and components into reusable patterns that were easier to maintain and extend.
  • Worked directly with stakeholders and backend partners to scope features, resolve recurring defects, and carry work through integration and release.
  • React
  • TypeScript
  • JavaScript
  • HTML
  • CSS

Education

M.S. Software Engineering

Florida Institute of Technology

2023

B.S. Information Technology

University of Central Florida

2021

Focus

Frontend architecture

Designing component systems and application boundaries that stay understandable as teams, features, and traffic grow.

  • React
  • Preact
  • TypeScript
  • AEM
  • Edge Delivery Services

Performance engineering

Finding the bottlenecks behind real user friction, then improving delivery, rendering, and Core Web Vitals without trading away maintainability.

  • Core Web Vitals
  • Lighthouse
  • SEO
  • Bundle strategy

Accessible product UI

Building resilient interaction patterns and complex user flows around semantic HTML, keyboard support, and WCAG 2.1 AA.

  • WCAG
  • Semantic HTML
  • Design systems
  • Responsive UI

Experimentation & analytics

Connecting implementation to evidence through consistent instrumentation, controlled experiments, and measurable product outcomes.

  • Adobe Target
  • Adobe Analytics
  • Web SDK
  • A/B testing

Quality engineering

Moving confidence earlier in the release cycle with focused unit coverage, end-to-end checks, and reusable Storybook patterns.

  • Jest
  • Cypress
  • Storybook
  • Regression prevention

Technical leadership

Turning broad product goals into delivery plans, mentoring senior engineers, and aligning frontend work across product, design, and backend partners.

  • Architecture
  • Mentorship
  • Planning
  • Cross-functional delivery

Contact

Let's build what's next.

I'm looking for a senior frontend role where I can own complex product work, improve the engineering foundations, and help the team grow. Reach out to discuss a role or see more of my work.

Remote · United States

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