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I’m a Senior Full Stack Engineer with 10+ years of experience building and scaling user-facing products. I focus on data-driven growth and reliable engineering to ship experiments that move acquisition, activation, and monetization metrics. I enjoy leading cross-functional teams, defining hypotheses with product and analytics partners, and delivering robust platforms that thrive under heavy traffic and frequent experimentation. My approach blends software craftsmanship with product thinking: I turn complex problems into scalable systems, measure outcomes with rigor, and iterate quickly to improve user activation and revenue while keeping production stability across distributed environments.…I’m a Senior Full Stack Engineer with 10+ years of experience building and scaling user-facing products. I focus on data-driven growth and reliable engineering to ship experiments that move acquisition, activation, and monetization metrics. I enjoy leading cross-functional teams, defining hypotheses with product and analytics partners, and delivering robust platforms that thrive under heavy traffic and frequent experimentation. My approach blends software craftsmanship with product thinking: I turn complex problems into scalable systems, measure outcomes with rigor, and iterate quickly to improve user activation and revenue while keeping production stability across distributed environments.

Joshua Walker Lee

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

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I’m a Senior Full Stack Engineer with 10+ years of experience building and scaling user-facing products. I focus on data-driven growth and reliable engineering to ship experiments that move acquisition, activation, and monetization metrics. I enjoy leading cross-functional teams, defining hypotheses with product and analytics partners, and delivering robust platforms that thrive under heavy traffic and frequent experimentation. My approach blends software craftsmanship with product thinking: I turn complex problems into scalable systems, measure outcomes with rigor, and iterate quickly to improve user activation and revenue while keeping production stability across distributed environments.…I’m a Senior Full Stack Engineer with 10+ years of experience building and scaling user-facing products. I focus on data-driven growth and reliable engineering to ship experiments that move acquisition, activation, and monetization metrics. I enjoy leading cross-functional teams, defining hypotheses with product and analytics partners, and delivering robust platforms that thrive under heavy traffic and frequent experimentation. My approach blends software craftsmanship with product thinking: I turn complex problems into scalable systems, measure outcomes with rigor, and iterate quickly to improve user activation and revenue while keeping production stability across distributed environments.

Available to hire

I’m a Senior Full Stack Engineer with 10+ years of experience building and scaling user-facing products. I focus on data-driven growth and reliable engineering to ship experiments that move acquisition, activation, and monetization metrics. I enjoy leading cross-functional teams, defining hypotheses with product and analytics partners, and delivering robust platforms that thrive under heavy traffic and frequent experimentation.

My approach blends software craftsmanship with product thinking: I turn complex problems into scalable systems, measure outcomes with rigor, and iterate quickly to improve user activation and revenue while keeping production stability across distributed environments.

Skills

Experience Level

Expert

Expert

Expert

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Expert

Expert

Expert

Expert

Expert

Expert

Expert

Language

English

Fluent

Work Experience

Senior Full Stack Engineer at WM

January 1, 2024 - Present

Drive high-impact growth experimentation and scalable platform development to improve acquisition and monetization funnels at scale. Designed and shipped 18 full-stack experiments across signup and onboarding flows, increasing activated users from 320K to 910K monthly. Built an internal experimentation platform supporting 150 concurrent tests and processing 95K events per minute with PostgreSQL and Redis for real-time analytics. Managed 5 engineers and collaborated with 6 product managers and analysts to define hypotheses and iterate growth strategies. Reduced experiment rollout time from 10 days to 2 days by implementing feature flags and CI/CD pipelines on Google Cloud Platform and Kubernetes.

Senior Software Engineer at American Airlines

June 1, 2021 - December 1, 2023

Optimize large-scale user engagement and booking flows through data-driven experimentation and full-stack ownership. Delivered 22 production experiments on booking and payment flows impacting 2.5M users, increasing completed bookings from 480K to 1.3M monthly. Built scalable backend services handling 110K daily API requests with Node.js and PostgreSQL, enabling real-time funnel tracking. Improved API latency from 420ms to 140ms across 4 core services by redesigning data access patterns and introducing Redis caching. Collaborated with 7 cross-functional partners to evaluate outcomes and prioritize the iteration roadmap.

Full Stack Developer at Vironix Health

January 1, 2018 - May 1, 2021

Develop scalable healthcare engagement platforms and implement growth experiments to drive activation and retention. Implemented 12 growth experiments for patient onboarding flows, increasing active users from 45K to 130K across web and mobile. Built full-stack features using React and Python APIs supporting 60K monthly users with secure data handling and analytics tracking. Partnered with 4 product managers and 3 designers to define hypotheses and iterate on user journeys based on behavioral data insights. Reduced onboarding completion time from 12 minutes to 4 minutes by redesigning UI flows and optimizing backend request handling.

Full Stack Engineer at NVIDIA

January 1, 2015 - December 1, 2017

Contributed to high-performance user-facing systems and experimentation foundations in a large-scale consumer platform. Developed 10 frontend and backend features supporting 1.8M users using React and Node.js, improving user interaction flows and engagement tracking. Collaborated with 5 senior engineers to implement A/B testing frameworks enabling 25 concurrent experiments across product surfaces. Built APIs handling 70K daily requests with optimized database queries and caching. Reduced page load time from 3.2 seconds to 1.1 seconds by optimizing frontend rendering and backend response handling.

Full Stack Intern at NVIDIA

June 1, 2014 - October 1, 2014

Delivered foundational engineering contributions and support feature development in an early-stage full-stack environment. Implemented 8 core product features and resolved 120+ bugs across frontend and backend systems supporting 250K users. Built REST APIs handling 25K daily requests using Node.js and integrated frontend components using JavaScript and HTML/CSS. Collaborated with 3 senior engineers to deliver production-ready features and maintain system reliability across deployments. Improved API response time from 600ms to 220ms by optimizing query performance and reducing unnecessary data processing.