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Full Stack Engineer

Steven Zimmer

Full stack engineer specializing in modern web platforms, AI tooling and model integration, growth engineering, technical SEO, and CMS architecture, with a track record of delivering scalable, high-performance systems in fast-paced, collaborative environments.

Steven Zimmer headshot

Focus Areas

Performance engineering
Growth systems
CMS architecture
AI product prototyping

Building fast, accessible, and AI-assisted product experiences.

Trusted by teams and founders

Recent Freelance Work

Select engagements focused on performance, growth, and highly maintainable platforms.

Benji Bakes E-Commerce Website Development logo

Benji Bakes E-Commerce Website Development

Built and launched a modern ecommerce experience for Benji Bakes that improved online ordering flow, streamlined operations, and created a reliable storefront that supports ongoing growth and repeat customer purchases.

React

Next.js

Stripe

Nodemailer

Zustand

Loom and Atlassian Integration and Market Strategy Execution

Led technical execution across the Loom and Atlassian integration, aligning implementation with acquisition requirements, improving launch readiness for Loom for AI, and enabling faster content operations through scalable CMS workflows.

Sanity CMS

React

TypeScript

Design Systems

Go-to-Market

Enhanced HubSpot CMS with Self-Service Drag-and-Drop Features

Designed and shipped self-serve HubSpot modules that gave content teams flexible drag-and-drop control, reduced developer bottlenecks, and improved consistency across design and SEO-critical page structures.

HubSpot

HubL

CSS

JavaScript

SEO

Scalable Web Infrastructure & Reusable Components

Partnered with design and marketing to establish a scalable web foundation and reusable component system that accelerated new page delivery, improved consistency, and supported both web and email production at scale.

React

TypeScript

Component Library

Email Templates

Design Systems

HubSpot CMS Rebuild to Enhance Brand Visibility logo

HubSpot CMS Rebuild to Enhance Brand Visibility

Rebuilt the Verta website on HubSpot to support rebranding and go-to-market goals, creating a more cohesive digital presence while improving marketing execution across web and email campaigns.

HubSpot CMS

Technical SEO

Marketing Automation

Email Development

Analytics

Shopify Rebuild Boosts Revenue and Site Performance

Led a full Shopify rebuild focused on performance and merchandising, delivering a faster and more flexible storefront that improved customer experience and supported stronger ecommerce conversion outcomes.

Shopify

Liquid

Shopify API

Shopify CLI

Performance Optimization

Unified WordPress Migration Boosts SEO and UX

Directed a complex multi-platform migration into a unified WordPress environment, improving governance, simplifying site management, and strengthening SEO and user experience through cleaner architecture and URL strategy.

WordPress

Webflow Migration

Drupal Migration

Technical SEO

Content Architecture

WordPress Optimization Spurs Traffic and Revenue

Optimized a high-traffic WordPress affiliate site with focused performance and content-delivery improvements that reduced load times, increased organic visibility, and drove measurable gains in engagement and revenue.

WordPress

Caching

Image Optimization

Database Optimization

Theme & Plugin Customization

Modern  Website with React, Next.js, AWS, and Headless CMS logo

Modern Website with React, Next.js, AWS, and Headless CMS

Delivered a modern marketing site built on a headless architecture, combining performance-focused hosting and polished interactions to improve content agility, brand presentation, and day-to-day publishing speed.

React

Next.js

Headless CMS

AWS S3

AWS Amplify

CloudFront

Framer Motion

WordPress Rebuild Aligns with Strategic Rebrand

Led a WordPress and Gutenberg rebuild aligned to rebrand and acquisition momentum, improving launch coordination across product and marketing while modernizing email systems for faster, more consistent campaign execution.

WordPress

Gutenberg

Email Automation

Template Systems

Go-to-Market

Front-End Web Development Course Leadership

Led a 12-week front-end development program focused on practical production skills, helping students ship stronger work through structured curriculum, hands-on projects, and targeted technical mentorship.

HTML

CSS

JavaScript

React

Curriculum Design

Mentorship

Website Optimization and Security Enhancement logo

Website Optimization and Security Enhancement

Improved site performance and technical SEO while remediating a critical spam-link infection, restoring search integrity, hardening the platform, and delivering a safer, faster user experience.

Technical SEO

Performance Optimization

Security Hardening

WordPress

Webflow to HubSpot CMS Migration and Rebrand logo

Webflow to HubSpot CMS Migration and Rebrand

Owned migration from Webflow to HubSpot CMS during a company rebrand, enabling stronger content operations and delivering a more scalable, cohesive digital presence across key customer touchpoints.

Webflow

HubSpot CMS

Migration Planning

Rebrand Rollout

Revamped Sign-Up and Activity Tracker Boosts Enrollment logo

Revamped Sign-Up and Activity Tracker Boosts Enrollment

Redesigned core enrollment and student-progress experiences to reduce friction and increase motivation, contributing to meaningful gains in sign-ups and stronger completion behavior across learning sprints.

React

UX Optimization

Product Analytics

Experimentation

Data Visualization

Drupal Upgrade and Server Architecture Overhaul logo

Drupal Upgrade and Server Architecture Overhaul

Executed major platform modernization work for Stanford Medicine, including Drupal upgrades, infrastructure improvements, and enterprise authentication integrations to improve reliability, security, and operational resilience.

Drupal 7

Drupal 9

Server Architecture

SAML

Box Integration

Personal Projects

Experiments and side projects showcasing modern UI engineering.

OpenAI logo

ZimGPT

  • A showcase of the OpenAI API and SDK, React, TypeScript, State Management, and Context API

Todos

  • A showcase of react, TypeScript, persisted state management, and TailwindCSS.

Tic Tac Toe

  • A showcase of React, State Management, and Tailwind CSS.

Floating Clock

  • A showcase of JavaScript Date object, CSS positioning, and color contrast management.

Mdrn Dsgn

  • A showcase of modern design trends on a fake company website.

Stats and Graphs

  • A demonstration of data visualization using random stats and charts library.

Box Scores App

  • A web app that displays box scores for NBA and MLB game scores.

Dog Guessing Game

  • Built using React, TypeScript, Tailwind, Vite, Immer and connect with the dog.ceo API.

Engineering Toolbox

A flexible stack spanning AI tooling, engineering foundations, CMS architecture, and growth systems.

Frontend

HTML/CSS

Vanilla JavaScript

TypeScript

React

jQuery

Redux

Zustand

Gutenberg Blocks

HubL

Liquid

Tailwind CSS

PostCSS

Framer Motion

Backend

Node JS

Next JS

Remix

PHP

Laravel

Gatsby

AWS

Prisma ORM

NoSQL

PostgreSQL

MySQL

GraphQL

REST APIs

MongoDB

Technical SEO

AI/ML

OpenAI API

Anthropic API

Google Gemini

Hugging Face

LangChain

Vercel AI SDK

Vector Databases (Pinecone, Supabase)

RAG Pipelines

Prompt Engineering

Evaluation & Guardrails

Tools

Webpack

Git

Command Line

GitHub

Vite

Okta

ElasticSearch

Statsig

Optimizely

Microsoft Clarity

Hotjar

LaunchDarkly

Zapier

Stripe

Firebase

Clerk

Auth0

CMS

WordPress

HubSpot

Sanity

Strapi

Contentful

Webflow

Statamic

Marketing

Hubspot

Marketo

Pardot

Salesforce

Mailchimp

MJML

Email Templates

Landing Pages

Google Analytics

Google Tag Manager

Google Search Console

UI Design

Figma

Adobe

Sketch

Certifications

Ongoing learning with a focus on modern frameworks and best-in-class tooling.

HubSpot CMS for Developers

HubSpot CMS for Developers

HubSpot CMS for Developers II: Best Practices

HubSpot CMS for Developers II: Best Practices

HubSpot SEO Certification

HubSpot SEO Certification

HubSpot SEO II Certification

HubSpot SEO II Certification

Let's build together

Ready to ship a fast, polished product experience?

I partner with teams to design and engineer high-performing systems that improve conversion, SEO, AI-enabled workflows, and long-term maintainability.