Senior Full-stack Developer (AI Agent)

Job Description

Domain: AI Agent

We’re building AI agents that resolve customer support tickets for e-commerce businesses autonomously end-to-end. They cancel orders, issue refunds, check inventory, talk to suppliers, and get better over time. To make this scalable, we’re building an AI Manager: a higher-level agent that trains, monitors, and optimizes the Support Agents with minimal human input – effectively an AI-run support team

Roles:

• 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

INTERVIEW PROCESS: English check with HR – 2 online tech interviews

OTHERS

• Working Location: Onsite at Dist.3, HCMC or Son Tra Dist., Da Nang City / Remote for candidates living on other cities in Vietnam
• Working Hours: 8h/day, Mon-Fri
• Duration: 6 months, can extend
• Domain: AI
• Salary: 3500-4000 USD gross/month
• SHUI: 50% (Must)