SeniorFullstackDeveloper

## Description ABOUT US: At Gradion, we are the strategic partner for ambitious businesses, helping them achieve breakthrough growth through Digital Innovation and Deep Tech. With a global vision and an AI-first approach, we enable clients to reshape strategies, optimize systems, and adopt cutting-edge technologies to create sustainable value.   From AI and data to cybersecurity, robotics, and large-scale enterprise platforms, Gradion designs practical solutions that lay the foundation for the next generation of billion-dollar companies.   OUR FACTS & FIGURES: 23+ years of expertise - Gradion builds digital platforms & deep-tech solutions. 3 continents: Asia, Europe and Africa. 300+ specialists across 6 countries Vietnam, Singapore, Thailand, Saudi Arabia, Germany and Egypt. 100+ enterprise clients, including several unicorns (e.g., Alaiko, HomeToGo, Roadsurfer). Vietnam’s Best IT Company – recognized by ITViec for 8 consecutive years, including 2 consecutive years of ranking #1 (2024 and 2025). ISO 27001. We're looking for a Senior Fullstack Developer to join our team and take ownership of building, optimizing, and scaling high-performing e-commerce experiences. You'll work across the full stack - from Shopify storefront UX to backend integrations and payment systems - with a direct impact on conversion, reliability, and global reach. ## In this role, you will Build and improve UI/UX across Shopify storefronts with a mobile-first approach, serving over 90% mobile traffic Manage and scale multi-currency and multi-language storefront setups Develop new features that improve store performance, subscription UX, and overall conversion rates Run A/B tests and implement tracking to continuously refine user interactions Maintain and extend payment gateway integrations (Apple Pay, Google Pay, PayPal, Stripe, Klarna, and more) Own backend reliability through robust monitoring, error tracking, and webhook event logging Enhance internal Shopify Admin tooling for a smoother ope