Stefan G.

👋 Hello. I am a 𝗦𝗲𝗻𝗶𝗼𝗿 𝗙𝘂𝗹𝗹-𝗦𝘁𝗮𝗰𝗸 𝗘𝗻𝗴𝗶𝗻𝗲𝗲𝗿 and 𝗦𝗵𝗼𝗽𝗶𝗳𝘆 𝗗𝗲𝘃𝗲𝗹𝗼𝗽𝗲𝗿 with 10+ years building production SaaS and e-commerce products with React, Node.js and TypeScript. I’ve shipped 15+ production Shopify apps, including public and custom applications, and I’m comfortable owning everything from UI to APIs, integrations, and architecture. I’m a good fit for long-term product work, SaaS MVPs, complex features, Shopify app development, Shopify Plus projects, integrations, performance problems, and existing applications that need experienced technical ownership. 𝗛𝗼𝘄 𝗜 𝘄𝗼𝗿𝗸: I care about the product, not just the ticket. If something in the architecture looks risky, I’ll point it out. If there’s a simpler approach, I’ll suggest it. And if I inherit an existing codebase, I’m comfortable figuring things out instead of waiting for a perfect specification. I’m comfortable taking ownership of a feature or product from requirements through implementation and production. 𝗪𝗵𝗮𝘁 𝗜 𝗯𝘂𝗶𝗹𝗱: • SaaS products and internal tools • React / Next.js / Remix applications • Node.js and TypeScript backends • REST and GraphQL APIs • Shopify apps and custom Shopify integrations • Authentication, OAuth, billing, credits, and account systems • Third-party integrations and automation • Webhooks, background jobs, retries, and idempotency • AI-powered product features • Performance improvements and legacy modernization 𝗧𝗲𝗰𝗵 𝗜 𝘄𝗼𝗿𝗸 𝘄𝗶𝘁𝗵: 𝗙𝗿𝗼𝗻𝘁𝗲𝗻𝗱: React, Next.js, Remix, TypeScript 𝗕𝗮𝗰𝗸𝗲𝗻𝗱: Node.js, GraphQL, REST APIs, Prisma, SQL, Redis, PHP, Laravel 𝗧𝗼𝗼𝗹𝘀: Docker, Git, cloud deployments, Figma, Jira A large part of my production experience comes from the Shopify and e-commerce ecosystem. As a Shopify app developer, I’ve delivered 15 public and custom applications and handled the full Shopify app development lifecycle, from product requirements and architecture through implementation and production. That work goes far beyond storefront development: React applications, Node.js services, Shopify APIs, OAuth, billing, webhooks, backend architecture, performance work, and third-party integrations. I’m comfortable building a new Shopify app from scratch, extending an existing app, or stepping into a mature codebase that needs experienced technical ownership. If you’re building something with React, Node.js, TypeScript, SaaS, AI, or Shopify, send me a message and tell me what you’re working on. For UMA: Shopify app developer — experienced developer building public and custom Shopify applications, integrations, APIs, OAuth flows, billing systems, webhooks, and backend services. Shopify app development — end-to-end development of scalable Shopify apps from architecture and implementation through testing, integrations, deployment, and ongoing improvements. Custom Shopify app development — tailored Shopify applications and integrations built around specific merchant workflows, business requirements, and third-party systems. Shopify Plus developer — experienced with Shopify Plus projects, custom app development, complex integrations, automation, performance optimization, and scalable solutions for high-volume and enterprise e-commerce stores. Shopify Plus development — development and technical implementation for Shopify Plus stores, including custom apps, APIs, integrations, checkout-related functionality, automation, and backend systems.