Senior Fullstack Developer (NodeJS, ReactJS/ VueJS)

Job 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 7 countries Vietnam, Singapore, Thailand, Saudi Arabia, Germany, Egypt and Australia. - 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. ### 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 operational experience ### What you will bring - **8+ years of software development experience**, with strong hands-on TypeScript and Node.js - **Deep JavaScript fundamentals** - async execution order, what your framework actually does under the hood. - **Strong general fundamentals of modern web applications** - how apps render in the browser, rendering strategies, how to make the customer experience smooth and fast, and how frontend, backend, and multiple systems communicate — especially in a global e-commerce context - **Production experience in React or Vue** (and Next.js or Nuxt) - depth in one matters more than shallow exposure to both; you should be able to explain what your framework does under the hood - **Familiarity with AWS** - you can reason about how an application is deployed and served (compute, CDN, storage, secrets); experience on another cloud and mapping the concepts across is just as good - **Daily, hands-on** use of Git, CI/CD pipelines, and agile workflows. - **Be the driver, not a passive coder** - you propose solutions, sketch the architecture, and challenge requirements that don't make sense. - **Strong written and spoken English** - the role involves daily collaboration with international stakeholders; clear, structured, to-the-point communication in technical discussions and async writing - **Active engagement** in team ceremonies and confident contribution to technical discussions - **Willingness and ability to learn the Shopify ecosystem** - you don't need Shopify experience on day one, but you must be genuinely curious and motivated to build it #### **Nice to have** - Shopify Functions, Shopify APIs, or Checkout UI Extensions experience - End-to-end testing exposure (Playwright, Cypress) - A/B testing and analytics/tracking tools - Multi-currency / multilingual storefront setups - Payment gateway integration experience - Deep cross-browser and cross-platform troubleshooting