Greyson Miller

I’m a Senior Software Engineer with 8+ years of experience designing and scaling cloud-native applications across SaaS, eCommerce, and enterprise platforms. I focus on backend architecture, API design, and third-party integrations, while leveraging modern JavaScript ecosystems like Node.js, React, and Next.js.

In my current role, I lead end-to-end web and mobile development with React, Next.js, and React Native—serving millions of users and improving engagement. I architect and build backend services with FastAPI, Django, PostgreSQL, and GCP to handle high-throughput requests, and I design RESTful and GraphQL APIs to connect frontend, mobile, and external systems. I integrate payments and commerce providers such as Stripe, Apple Pay, Google Pay, and Shopify, including custom Shopify Hydrogen storefronts, and I set up CI/CD with GitHub Actions to improve deployment speed and reliability.

I also bring strong team leadership through mentoring 10+ engineers on API-first design, system architecture, and best practices, which improves code quality and delivery speed. Previously at Omnicom, I developed a customer engagement platform using NestJS, GraphQL, and Django for 100K+ users, integrated third-party marketing/analytics APIs, and built a Shopify app with OAuth, webhooks, and GraphQL Admin API for real-time synchronization. Earlier, I engineered backend systems with Laravel and Django and containerized them with Docker to strengthen reliability and performance across logistics, finance, and B2B platforms.