Senior
Development
Da Nang, Ho Chi Minh, On-site
15 hours ago

Senior Full-stack Developer (AI Agent)

We’re building AI agents that autonomously resolve customer support tickets for e-commerce businesses end-to-end. Our agents cancel orders, issue refunds, check inventory, communicate with suppliers, and continuously improve over time. To make this scalable, we’re building an AI Manager — a higher-level agent that trains, monitors, and optimizes Support Agents with minimal human input. Our goal is an AI-run support team, where managing AI feels like managing a human teammate, not writing prompts.

Responsibilities

  • Own and deliver features end-to-end, from product design to production
  • Lead the technical design of complex, cross-cutting features and systems
  • Make architectural decisions with long-term impact, balancing speed, scalability, and maintainability
  • Proactively identify systemic risks, bottlenecks, and failure modes, especially in AI-driven workflows
  • Build and evolve AI-driven systems that manage, evaluate, and improve autonomous agents
  • Develop AI-native, self-serve workflows for customers to configure and improve their agents without human-heavy setup
  • Design and implement scalable backend services using Python and FastAPI
  • Build clean, high-quality frontend experiences using TypeScript, React, and Nextjs
  • Create flexible integrations with diverse customer systems. Design APIs, schemas, and abstractions that are clear and legible to both humans and AI agents
  • Collaborate closely with AI tools (Claude, Cursor, LLMs) to reason about architecture, generate evals, explore codebases, and ship meaningful chunks of work
  • Improve system reliability, scalability, and long-term maintainability
  • Contribute to product and architectural decisions alongside a small, fast-moving team

Requirements

Technical Skills

  • Strong experience with TypeScript, React, and Next.js
  • Solid backend experience with Python (FastAPI)
  • Experience deploying and operating systems on AWS
  • Strong understanding of clean architecture, APIs, and distributed systems
  • Comfortable working with complex, poorly documented, or legacy systems

AI & Product Mindset

  • Use AI tools daily (e.g. Claude, Cursor, ChatGPT) as part of your development workflow
  • Familiarity with AI agents, LLM limitations, and evaluation strategies
  • Care deeply about developer experience, product quality, and system design
  • Think in systems, not just tasks

Benefits & Perks

  • An open mind and flat structure where every voice is welcome.
  • A work environment built on transparency, seamless communication, trust, and a sensible approach, combined with mixed cultures and a speaking environment
  • Individual assessments every 6 weeks with your line manager
  • Performance review every  6 months
  • 15 days of annual leave and + 6 days of fully paid sick leave per year – can be used for the care of sick child
  • Christmas Holiday
  • Competitive salary
  • Bonus: 13th-month Salary
  • Social insurance for employees who pass their probation

Learn more about Xenia Tech

If you have any questions, please feel free to get in touch with our HR department at [email protected].

Learn more about our culture and special benefits package here.

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