Senior AI Agent Engineer — Scalable Customer Engagement

Wati; Hong Kong; On-site; HKD 680,000 - 900,000; Full time

Job summary

Wati is seeking a hands-on Senior Software Engineer to build customer-facing AI agents and the shared platform capabilities that make them work at scale. You will work closely with product, design, and platform engineers to turn LLM capabilities into reliable, measurable customer experiences.

This is a senior individual-contributor role for a builder: someone who enjoys shipping end-to-end product capabilities, making pragmatic technical decisions, and improving the foundations as the product

Qualifications

• 4-7 years of software-engineering experience.
• Experience shipping production systems with Python, TypeScript, or similar languages.
• Practical experience building LLM-powered applications (RAG, tools, agents).
• Strong ownership and debugging skills.
• Consideration for reliability, latency, privacy and cost in customer-facing systems.
• Clear written and spoken communication in a fast-moving team.

Responsibilities

• Build and operate customer-agent capabilities, including conversation flows, knowledge retrieval, tool calling, human handoff, and messaging-channel integrations.
• Develop reliable LLM application services: prompts, context management, RAG, guardrails, fallback behavior, and structured tool execution.
• Build evaluation and observability workflows measuring answer quality, task success, latency, cost, and failure modes.
• Partner with product, design, and customer-facing teams to turn real customer problems into shipped agent experiences.
• Improve the shared agent platform with reusable primitives, APIs, testing, deployment, monitoring, and developer experience.
• Contribute to technical design and raise engineering quality through thoughtful implementation and code reviews.

Skills

Backend

Full-stack

Python

TypeScript

LLM apps

Ownership

Debugging

Reliability

Job description

Wati is seeking a hands-on Senior Software Engineer to build customer-facing AI agents and the shared platform capabilities that make them work at scale. You will work closely with product, design, and platform engineers to turn LLM capabilities into reliable, measurable customer experiences.

This is a senior individual-contributor role for a builder: someone who enjoys shipping end-to-end product capabilities, making pragmatic technical decisions, and improving the foundations as the product