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Eric Koyanagi

Technical Lead

Full-stack technical lead who builds products from zero to scale — ERPs, SaaS platforms, e-commerce engines, and everything in between.

Versatile technical lead with deep full-stack expertise spanning e-commerce, adtech, SaaS, and game development. Known for architecting bespoke systems from the ground up, scaling operations to thousands of daily transactions, and leading international engineering teams. Seeking a senior technical leadership role where I can drive product strategy, mentor engineers, and ship high-impact software.

Gulfport, MS

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Experience

MCD Partners

Technical Lead

  • Led engineering for enterprise-grade web projects at a New York design agency, working directly with clients and stakeholders to deliver performant, design-driven solutions
  • Innovated a hybrid React layer for WordPress that delivered rich interactivity without the complexity of a full headless architecture
  • Implemented pixel-perfect designs from Figma using Tailwind CSS, tightly integrating component-based design systems
WordPressReactTailwind CSSAWSCI/CD
TheTot logo

TheTot

Technical Lead

3PL integration architecture — TheTot
  • Served as technical lead for an e-commerce platform generating up to $20M in annual revenue, owning day-to-day engineering management and feature development
  • Architected a complex backorders system integrating WooCommerce and Symfony, solving critical inventory management gaps
  • Optimized legacy MySQL queries and resolved ElasticSearch flaws, improving site performance and search reliability
PHPWooCommerceSymfonyElasticSearchAWS
Texty logo

Texty

Technical Lead

Texty — creator monetization platform
  • Managed an international team of up to 9 developers, overseeing hiring, performance management, code reviews, deployments, and daily scrums
  • Architected a flexible, robust backend powered by AWS for a SaaS platform enabling influencer-to-fan monetization via text messaging
  • Shipped a cross-platform MVP (React Native mobile app, Vue web storefront, Node.js API) that achieved customer adoption on both Apple App Store and Google Play
React NativeNode.jsVue.jsLaravelAWS

Strength.com

Developer

Strength.com — e-commerce lead
  • Built and maintained a bespoke Laravel e-commerce system supporting a complex white-label partner program for gym storefronts
  • Led migration of the direct-to-consumer site to Shopify Plus, streamlining operations and improving the customer experience
  • Developed a fingerprinting pixel for analytics integrated with Treasure Data (CDP), feeding insights into Tableau dashboards
LaravelShopify PlusPythonTreasure DataAWS

AerServ

Software Engineer

AerServ acquired for $100M
  • Developed the Ruby on Rails client-facing UI that surfaced rich analytics from hundreds of millions of rows of adtech data into clear, actionable visualizations
  • Helped tune MySQL queries and ETL processes for high-volume data pipelines powering real-time reporting
  • Implemented features for a Java-based AdServer and Android/iOS SDKs
Ruby on RailsJavaMySQLAWSPHP

Jondo

Software Engineer (First Engineering Hire)

Jondo production floor — print-on-demand at scale
  • Built a bespoke ERP from the ground up as the company's first engineering hire, unifying order management, production, shipping, accounting, and analytics for a globally-scaled print-on-demand operation
  • Scaled the platform to handle thousands of orders per day, supporting rapid business growth
  • Innovated a method to transmit images to industrial raster software that lacked an API, unblocking a critical production workflow
PHPC#MySQLEDIJavaScript

Skills

Languages

  • PHP
  • JavaScript
  • TypeScript
  • C#
  • Python
  • Java
  • Ruby
  • SQL

Frameworks & Libraries

  • Laravel
  • React
  • React Native
  • Vue.js
  • Node.js
  • Ruby on Rails
  • Symfony
  • Unity3D
  • Tailwind CSS

E-Commerce & CMS

  • Shopify Plus
  • WooCommerce
  • WordPress
  • Drupal
  • Roots/Trellis/Sage

Cloud & Infrastructure

  • AWS
  • Lambda
  • ElastiCache
  • CI/CD
  • ElasticSearch

Data & Analytics

  • MySQL
  • ETL Pipelines
  • Tableau
  • Treasure Data (CDP)
  • ElasticSearch

Practices & Other

  • ERP Development
  • EDI Integration
  • API Design
  • Agile/Scrum
  • Technical Writing
  • Team Leadership

Projects

Mean Games — Space RPG

Space RPG title screen — earned Steam Greenlight approval

Founded an indie game studio and led a small team of artists, writers, and musicians to create a space-themed RPG in Unity. Earned community approval for sale via the Steam Greenlight voting program.

C#Unity3DBehavior TreesVector MathematicsObject Pooling