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Senior Fullstack Engineer

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Senior Fullstack Engineer in Others

  • GRADION
  • Full time
  • Email
  • Hanoi, Vietnam

Responsibilities

  • Lead the design and development of a multi-market storefront using Next.js and TypeScript.
  • Choose rendering strategies and design end-to-end caching across CDN, edge, and browser layers.
  • Own performance optimization across bundle size, hydration cost, and time to first byte in multiple regions.
  • Build and maintain Node.js orchestration services using REST or GraphQL between the storefront and commerce services.
  • Implement multilingual, multi-currency catalog and pricing experiences.
  • Develop payment and checkout flows using gateways such as Stripe, PayPal, Klarna, Apple Pay, and Google Pay.
  • Support A/B testing and analytics tracking, automated testing, CI/CD, observability, monitoring, and rollback procedures.
  • Mentor mid-level engineers and collaborate with Gradion and client engineering teams on architecture and implementation.
  • Experiment with AI developer tools including Cursor, Claude, and Copilot.

Requirements

  • 5+ years of engineering experience building production web applications at scale, with recent experience weighted toward frontend work.
  • Strong command of TypeScript, React, Next.js, JavaScript, and browser fundamentals.
  • Backend experience with Node.js and REST or GraphQL APIs, including storefront and commerce-service orchestration.
  • Strong understanding of rendering and caching strategies and their trade-offs.
  • Hands-on experience deploying to a CDN or edge platform such as Cloudflare, Vercel, or CloudFront.
  • Working exposure to AWS services such as Lambda and S3.
  • Experience with automated testing and CI/CD pipelines.
  • Good spoken and written English for daily technical discussions, architecture sessions, and pairing with European engineers.
  • Willingness to learn the Shopify ecosystem.
  • Preferred qualifications include Shopify headless development with Storefront API, Functions, or Checkout UI Extensions; e-commerce or conversion-focused product experience; subscription or recurring purchase experience; Playwright or Cypress; analytics tools; and headless CMS platforms.

Benefits

  • Performance bonus of up to 2 months’ salary.
  • Performance reviews twice a year.
  • Premium healthcare and an annual health check.
  • 15 days of annual leave and full salary during probation.
  • Hybrid working arrangement.
  • Monthly Happy Hour and community technology activities.
  • Global projects, innovation-team participation, and diverse training programs.
  • Monday–Friday working schedule from 9 AM to 6 PM at the Ho Chi Minh City office.

GRADION

Gradion is a privately held IT services firm that designs and builds digital platforms and deep-tech solutions—AI, data engineering, cybersecurity, and robotics—for e-commerce, retail, travel/mobility, and logistics. It provides consulting and software engineering through project-based and manage...

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