Senior/Principal Frontend Engineer ReactJS/AI

We are looking for a frontend engineer to lead the development of our AI Agent platform/application from the ground up. The ideal candidate has experience building complex web applications, crafting intuitive user experiences, and collaborating effectively with cross-functional teams.

Responsibilities
Lead frontend development of the AI Agent platform or application from scratch, ensuring high performance, responsiveness, and usability

Design and implement complex UIs that interact seamlessly with backend APIs, real-time agent outputs, and developer toolchains

Collaborate with design and product teams to translate user needs and business goals into elegant, scalable interfaces

Introduce tools, frameworks, and development practices to improve frontend engineering efficiency and maintainability

Mentor and support the growth of team members by helping them deepen their frontend expertise and best practices

Take technical leadership across a cross-functional team-including frontend, backend, AI, and SRE engineers-and drive the overall development process

Technical

Must have

• 5+ years of experience in web development
• 3+ years of experience with [protected info] and TypeScript
• Solid understanding of:
  • Modern frontend architecture and state management (e.g., Redux, Context API)
  • Component-based UI development and performance optimization
  • Frontend testing frameworks (e.g., Mocha or Jest)
  • Browser rendering behavior and accessibility best practices
• Experience with:
  • [protected info] and Webpack
  • Git-based development workflows
  • Docker and containerized development environments
  • Monitoring and debugging with tools like Datadog, Rollbar
  • Operating and maintaining frontend applications in production environments
  • Agile development processes

Nice to have

• Experience with:
• Integration with AI APIs (e.g., LLM-based outputs)
• Reading or navigating Python (FastAPI) backend code
• MySQL or basic relational database understanding
• Practical knowledge in:
• B2B SaaS product development, especially for back office domains
• Collaborating with backend engineers on API design and integration
• Performance profiling and web vitals monitoring
• Infrastructure as Code (IaC) and CI/CD pipeline automation

Communication

• Experience leading a project as a team lead (required for Leader position)
• Experience mentoring or educating team members
• Strong sense of ownership and accountability
• Business-level English (reading & writing)

Caring Mental & Physical Recreation:

• Hybrid working
• Full salary in probation & 13th month salary
• Social insurance on full salary from probation
• Premium Health insurance from probation
• Flexible start 8AM-9AM from Mon-Fri
• 16 days off annually + 1 Birthday Leave
• Paternity leave extra 5 days
• Annual company trip; Quarterly team building activities
• Club activities
• Annual health check

Caring Career & Development:

• Clear Career path
• Foreign language & International technology-related certifications sponsoring
• Well-equipped facility: Macbook pro, additional monitor,..
• Soft skill workshops
• Tech seminars
• Monthly and biannually Recognition Awards
• Performance review twice/year