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Hi, I'm James Lee. I'm a senior full-stack engineer with 7+ years of experience delivering high-quality web applications, improving checkout systems, and integrating third-party APIs for small businesses and creative brands. I specialize in e-commerce workflows, CMS customization, payment and shipping integrations, and debugging complex backend issues that affect customer purchases. I've worked directly with artists, solo entrepreneurs, and design-focused brands to improve conversions, simplify customer journeys, and reduce friction in critical flows. I thrive in remote environments, excel at requirements gathering and sprint planning, and deliver fast, stable solutions within tight deadlines.…Hi, I'm James Lee. I'm a senior full-stack engineer with 7+ years of experience delivering high-quality web applications, improving checkout systems, and integrating third-party APIs for small businesses and creative brands. I specialize in e-commerce workflows, CMS customization, payment and shipping integrations, and debugging complex backend issues that affect customer purchases. I've worked directly with artists, solo entrepreneurs, and design-focused brands to improve conversions, simplify customer journeys, and reduce friction in critical flows. I thrive in remote environments, excel at requirements gathering and sprint planning, and deliver fast, stable solutions within tight deadlines.

James Lee

Full Stack Developer, Web Developer, Back-End Developer, +2

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Hi, I'm James Lee. I'm a senior full-stack engineer with 7+ years of experience delivering high-quality web applications, improving checkout systems, and integrating third-party APIs for small businesses and creative brands. I specialize in e-commerce workflows, CMS customization, payment and shipping integrations, and debugging complex backend issues that affect customer purchases. I've worked directly with artists, solo entrepreneurs, and design-focused brands to improve conversions, simplify customer journeys, and reduce friction in critical flows. I thrive in remote environments, excel at requirements gathering and sprint planning, and deliver fast, stable solutions within tight deadlines.…Hi, I'm James Lee. I'm a senior full-stack engineer with 7+ years of experience delivering high-quality web applications, improving checkout systems, and integrating third-party APIs for small businesses and creative brands. I specialize in e-commerce workflows, CMS customization, payment and shipping integrations, and debugging complex backend issues that affect customer purchases. I've worked directly with artists, solo entrepreneurs, and design-focused brands to improve conversions, simplify customer journeys, and reduce friction in critical flows. I thrive in remote environments, excel at requirements gathering and sprint planning, and deliver fast, stable solutions within tight deadlines.

Available to hire

Hi, I’m James Lee. I’m a senior full-stack engineer with 7+ years of experience delivering high-quality web applications, improving checkout systems, and integrating third-party APIs for small businesses and creative brands.

I specialize in e-commerce workflows, CMS customization, payment and shipping integrations, and debugging complex backend issues that affect customer purchases. I’ve worked directly with artists, solo entrepreneurs, and design-focused brands to improve conversions, simplify customer journeys, and reduce friction in critical flows. I thrive in remote environments, excel at requirements gathering and sprint planning, and deliver fast, stable solutions within tight deadlines.

Skills

Experience Level

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Work Experience

Senior Software Engineer at Frigid

March 1, 2023 - August 1, 2025

Rebuilt e-commerce flows, improving checkout stability by 40% through JavaScript enhancements, API debugging, and input validation. Led migration and optimization of client-facing purchase flows, improving server response times by 45%. Built secure endpoints using Node.js and integrated third-party payment processors to improve transaction success rates. Architected real-time order management dashboards with status updates and automated notifications. Collaborated with non-technical stakeholders to translate requirements into actionable tasks, achieving high client satisfaction. Implemented API-driven modules for artwork uploads, printing orders, and custom requests, reducing time-to-publish from hours to minutes.

Full Stack Engineer at Jumy

January 1, 2019 - December 1, 2022

Enhanced SEO, metadata rules, and structured product schemas to increase organic visibility by 18% YoY. Set up automated build & deploy pipelines, shrinking release cycles from 7 days to under 24 hours. Refactored legacy modules into modern components, reducing code complexity by 30% and improving maintainability for CMS extensions. Designed integration-ready components for artist portfolios, enabling toggling between print options, shipping variants, and inquiries. Developed customer-facing purchase flows and custom checkout logic, improving order conversion rates by ~22%. Integrated multiple external APIs, including shipping rate providers and CRM systems, reducing manual fulfillment time by 50%.

Full-stack Developer at AAdigital

June 1, 2016 - September 1, 2018

Improved backend reliability by building structured error-logging and monitoring pipelines, reducing checkout-related support tickets by 35%. Customized CMS-based websites (similar to Squarespace/Shopify) enabling small businesses and artists to manage digital storefronts with minimal technical experience. Implemented responsive UI components for product galleries and artwork displays, increasing average session duration by 17%. Delivered projects under one-week timelines for small clients, developing rapid iteration and dependable execution.