Lead Growth Experimentation Engineer

Eric Barber

14+ years building for the web. The last 8 spent testing it.

See what I work with

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Skills

What I do.

The stuff that shows up in almost everything I ship.

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Experimentation

A/B testing, personalization experiences, feature flagging, and hypothesis-driven development.

$ skills --list experimentation

optimizely / adobe target / vwo
feature flags
hypothesize → build → measure

Analytics

Communicating with Segment for the data layer. Amplitude and Mixpanel for the product questions.

$ skills --list analytics

segment · event taxonomy
amplitude / mixpanel / google analytics

AI-assisted development

Claude and Cursor, pretty much daily — for writing code and for thinking out loud about it.

$ skills --list ai

claude · cursor · grok · chatgpt · stable diffusion
scaffold → refactor → review
debugging the weird stuff faster

Engineering

JavaScript, HTML, and CSS every day. PHP, Ruby, and Java in past lives. Next.js or Svelte for anything new. Docker, Drone, GitHub, Jira, and Sentry keep it all moving.

$ skills --list engineering

javascript / html / css
next.js · svelte · php · java
docker · drone · github · sentry

Platforms & CMS

Experienced with a variety of platforms and content management systems old and new.

$ skills --list platforms

contentstack · aem
wordpress · drupal · shopify · sharepoint

Design

No stranger to the Adobe suite of products; acquainted with new kids on the block like Figma.

$ skills --list design

photoshop · illustrator · after effects
figma · rive

Selected work

A few things I can talk about.

No screenshots — proprietary stuff stays proprietary. The outlines are fair game.

Adobe Target migration

Lead Growth Experimentation Engineer · MongoDB

Led the migration of experimentation on mongodb.com (millions of monthly visits) from Optimizely to Adobe Target — cutting the base snippet ~61% (≈94KB → 36.5KB) while keeping audiences and activities intact.

Homepage loads that used to hit 300KB+ with Optimizely landed around ~96KB with Target (~68% lighter)
Shared utilities to cut repeat implementation work

Stack Adobe Target · JavaScript · AEM · Segment · Mixpanel · Contentstack

CLI experimentation platform

Lead Growth Experimentation Engineer · MongoDB

Reusable tooling so product teams can stand up experiments faster, with less one-off engineering per launch.

Reusable implementation patterns
Standardized analytics instrumentation
Less duplicated code across experiments
Product API integrations that cut engineer time per experiment

Stack JavaScript · Node · Segment · Mixpanel · Adobe Target · Optimizely

Employee-facing web apps

Developer III · Mediacom Communications

Built and maintained internal web apps supporting ~4,500 employees — provisioning, travel requests, and similar day-to-day workflows — with a small team.

Full-stack delivery across multiple employee use cases
Ongoing maintenance and feature work

Stack PHP · Java · JavaScript · HTML · CSS

Experience

Where I've been.

Growth and experimentation since 2018. Web since before that.

Lead Growth Experimentation Engineer
MongoDB
Jun 2021 – Present · 5 yrs
Leading experimentation architecture for one of the world’s largest developer platforms on the public-facing website — Optimizely, Intellimize, and Adobe Target implementations, analytics instrumentation, and personalization experiences.
Senior Experimentation Engineer
CRO Metrics
Aug 2018 – Jun 2021 · 2 yrs 11 mo
Worked on a specialized remote team building, testing, and optimizing digital experiences for high-growth companies across a variety of A/B testing platforms.
Co-Owner
Tincture Design
Nov 2017 – Present
Co-owned a small web design and development primarily focused on building websites for the wellness/health industry.
Developer III
Mediacom Communications
Oct 2013 – Aug 2018 · 4 yrs 10 mo
Built and maintained internal web apps for various teams and use cases — generally full-stack and end-to-end, from the server and APIs to the front-end experience.
Web Designer/Developer
FusionMS
May 2012 – Oct 2013 · 1 yr 6 mo
Primarily a Microsoft SharePoint shop — heavily designed templates for customers, plus occasional design work from product kiosks to posters.

BS, Information Technology, minor in Fine Arts — Fairleigh Dickinson University, 2009-2012

About

New Jersey-based, full-stack by nature.

I live where experimentation, analytics, and front-end development overlap — designing the test, wiring up the events that measure it, and shipping the UI that makes both happen. The engineering background keeps it fast. The design background keeps the UI accurate. The AI-assisted workflow keeps it fun and constantly evolving.

I grew up making websites before I knew they could be a career — FrontPage, Myspace layouts, then my own sites in high school. Fourteen years later I still like the design/engineering overlap more than either on its own. Outside of work I'm usually restoring old consoles I never have time to play, running a couple game servers (Minecraft and Palworld lately), recording music, or out with the goats and chickens. And chasing my daughter around the yard and keeping an eye out for what new animals my wife has brought home.

View résumé

Engineer Amateur game developer
Front-end focused
Full-stack capable
Musician perfect grey
Skinwalker
Ashen Maw
Gamer Retro console connoisseur
Game Server Administrator
Steam
Athlete Powerlifting
Mountain Biking
Hiking

Contact

Get in touch.

If you’d like to talk experimentation, front-end architecture, analytics, or just swap ideas, I’m always happy to chat.

Email or LinkedIn works best.

Email LinkedIn GitHub

New Jersey, USA