Fullstack Developer (Modern Web, API & AI)

Working location: Remote full-time

Salary range: Up to VND 18,000,000 gross

RESPONSIBILITIES

We are looking for an experienced Fullstack Developer to design, build, and maintain modern web systems from scratch. This role requires strong fundamentals across frontend, backend, APIs, and integrations, with familiarity in current web technologies and AI-assisted development workflows.

You will work on production platforms, internal tools, and client-facing systems, owning features end-to-end from implementation to optimisation.

Fullstack Development

• Design and build web applications and platforms from scratch, including system structure, data flow, and integrations.
• Develop and maintain frontend and backend components using clean, scalable code.
• Translate business and functional requirements into practical technical solutions.

API & Integration

• Design, develop, and maintain RESTful APIs for internal and external use Integrate third-party services such as payment gateways, CRM systems, analytics tools, and automation platforms.
• Ensure secure, efficient, and well-documented API communication.

Frontend, UI & UX Execution

• Implement responsive, accessible, and user-friendly interfaces based on design intent or wireframes.
• Build reusable UI components and layout systems.
• Improve usability, performance, and user flow across platforms.
• Refactor poorly structured or legacy frontend implementations.

Performance, Stability & Scalability

• Optimise frontend and backend performance, including page load time and system responsiveness.
• Diagnose and resolve performance bottlenecks at code, database, and integration levels.
• Ensure systems remain stable, scalable, and maintainable under real-world usage.

AI-Accelerated Development

• Use modern AI tools to accelerate development, refactoring, and debugging.
• Review, validate, and harden AI-assisted code before production use.
• Stay updated on emerging AI and automation practices relevant to web development.

Collaboration & Delivery

• Work closely with designers, project managers, and other developers.
• Communicate technical trade-offs, risks, and recommendations clearly.
• Maintain proper documentation and handover materials.

REQUIREMENTS

Strong experience with WordPress or Shopify (one must be solid)

Solid experience in frontend and PHP development

Strong understanding of REST API design and integrations

Able to build systems from scratch, not just customise themes or plugins

Proficient in PHP, JavaScript, HTML, CSS, and MySQL

Comfortable working independently on live production systems

Experience with version control systems such as Git

***Nice to have

Experience with Laravel or other backend frameworks

Familiarity with modern frontend frameworks such as React or Vue

Experience using AI tools for development, automation, or integrations

Strong UI/UX sensibility without heavy design hand-holding

Experience working on high-traffic or data-heavy systems, including exposure to performance tuning, database optimisation, caching strategies, or search solutions

Familiarity with concepts such as CDNs or object caching is a strong plus