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15+ years building products that drive revenue

Software engineer with 15+ years building products that sell. I've shipped ecommerce platforms, marketing campaigns, and digital experiences for brands like P&G, Netflix, Disney, and Instacart — turning business goals into production code and measurable results. I specialize in sustainable tech stacks for startups, agencies, and ecommerce companies.

Experience

Zoro Tools, Inc.

Apr 2019 - Present

Sr Software Engineer

B2B eCommerce with over 6 million SKUs. Responsible for pages that generate millions of dollars in revenue per day.

  • Refactored Python/Django templates to Vue / SSR / Node
  • Lead core Vue-based component library team
  • Key engineer of Auto-fitment product matching feature utilizing microservices
  • Overhauled product & paid search pages to increase conversions through data-driven optimization
  • Drove A/B testing and feature flagging with LaunchDarkly to continuously optimize user experience and revenue
  • Wrote unit tests with 100% code coverage for all components
  • Collaborated with UX, Analytics, and Data Science teams
  • Mentored software engineering Interns

Blue Chip Marketing Worldwide

Mar 2018 - Mar 2019 & Nov 2015 - Oct 2016

Lead Front-end Developer

A leading digital and shopper marketing agency.

  • Jointly developed front end component framework to launch unique websites for 40+ brands
  • Worked with content strategists to develop content schema for use in our custom CMS to accommodate 20+ locales and languages
  • Developed Single Page Applications for clinical trial recruitment for major pharma brands such as Merck, Bayer, AbbVie, Bristol-Myers Squibb
  • Developed sites for clients such as Ricola, Blue Bunny, Bomb Pop, Fisher, McCormick, Haribo, WeightWatchers, Tide, and Braun

Tidal Commerce, Inc.

Oct 2016 - Mar 2018

Senior Web Developer & Marketing Executive

Payment processing and merchant services with a focus on providing custom solutions for payment card acceptance.

  • Built and maintained marketing website and internal sales tools
  • Directed rebranding efforts
  • Increased web lead rate 20x in first 12 months
  • Increased search impressions 10x in 12 months
  • Implemented data focused sales strategy
  • Built web, email, and print campaigns
  • Managed Google AdWords PPC and retargeting campaigns

Impeccable Digital

Aug 2014 - Oct 2016

Co-Founder

A design and development studio in Chicago specializing in ecommerce development. Acquired by Tidal Commerce in 2016.

  • Developed and administered WordPress, Magento, and Drupal sites
  • Built HTML/CSS/JS components for client websites
  • Hired and fostered highly skilled developer team
  • Formed strategic partnerships with sub contractor services

1Card, Inc.

Apr 2013 - Mar 2015

Lead UI/UX Developer

A startup with a mission to link all of your various tender to 1 card. Worked closely with designers, backend developers, and executives to guide UX and develop front end code.

Spark Hire, Inc.

May 2011 - Apr 2013

UI/UX Designer & Front-end Developer

A video interviewing platform. Responsible for user experience, visual design, and development including iOS/Android mobile app, email campaigns, and landing pages.

Skills

Frontend

  • Vue / Nuxt
  • TypeScript
  • Tailwind CSS
  • HTML / CSS / Sass
  • GraphQL
  • Accessibility (WCAG)

Backend & Infrastructure

  • Node.js
  • Python / Django
  • Docker
  • AWS
  • CI/CD

Ecommerce & CMS

  • Shopify
  • Stripe
  • WordPress
  • Magento
  • Headless CMS
  • PCI Compliance

Marketing & Analytics

  • Google Analytics / GA4
  • LaunchDarkly
  • A/B Testing & Feature Flags
  • Tag Manager / GTM
  • SEO / SEM
  • Schema.org
  • Email Campaigns

AI & Automation

  • Claude Code
  • Codex
  • Cursor
  • GitHub Copilot
  • OpenAI API
  • AI-assisted development workflows
  • Prompt engineering

Design & UX

  • Figma
  • Adobe Creative Suite
  • Responsive design
  • Design systems

Projects

Pilot Car Loads

2020 - Present

I co-created PilotCarLoads.com — a modern job board for the oversize industry. Users sign up and create Load Alerts based on criteria like location, position, and pay.

Vue, Nuxt, Python, Tailwind CSS, Stripe, Twilio, Mailgun

  • 1,200+ Registered Users
  • 100,000+ Load Alerts sent monthly

PlayTunes for Android

2014 - 2018

I co-designed and developed PlayTunes — a music player for Android used worldwide with a focus on compatibility for a wide range of devices.

Android Development, Interaction Design

  • 4/5 Rating (300+ Reviews)
  • 50,000+ downloads

Recommendations

“I'm pleased that I can say that I hired Mark Spirek -- he's a reliable, smart and well-rounded front end developer. He delivered quality work on every project, has a great work ethic with no complaints, and he's a good guy to be around.”

— Dan Boland, Technology Lead at Critical Mass

“Working with Mark is pleasure. He is passionate about design and user experience, and cares deeply about the quality of his work. Mark is able to execute from high level concept through development with little oversight. He's an asset to any team.”

— Richard DeNardis, Chief Revenue Officer at Home Chef

“Mark told me that being a user experience designer meant that he, like the titular character of Tron, fights for the user. Indeed, Mark will go to any length to ensure that visitors to the company's websites have the smoothest and friendliest experience possible.”

— Max Galloway, Developer at Spark Hire