Senior Fullstack Developer (Nextjs, Nodejs, AWS)

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 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