Lead / Senior Full Stack Developer at Coalition Technologies

Built custom Shopify apps using Remix, Node.js, and GraphQL to automate order routing and inventory management for enterprise merchants, delivering end-to-end full-stack ownership from backend logic to store front UI. Migrated 3 enterprises to Shopify Plus (Online Store 2.0) using Liquid and Tailwind CSS, improving mobile conversion rates by an average of 18%. Developed a headless commerce solution with Hydrogen and Next.js for a global fashion brand, reducing page load times by 1.4 seconds and lowering bounce rates by 22%. Mentored and led a team of 4 front-end developers with code quality guidance, code reviews, and full-stack best practices.

Full Stack Web & E-commerce Developer at Swanky

Built custom store front features and checkout solutions for 15+ merchants across Poland and Germany. Integrated stores with external ERP and CRM platforms using webhooks and REST/GraphQL APIs to automate data synchronization using the same integration patterns leveraged for AI and third-party services in production systems. Improved website performance and SEO across multiple stores, increasing average Google PageSpeed scores from 45 to 88. Developed reusable front-end components and content blocks to enable marketing teams to create and manage landing pages without developer support.