Full-Stack Engineer - Frontend Focus (SaaS)
Wati · Hong Kong
Wati is the world's leading WhatsApp-first conversational growth platform, empowering businesses to build deeper customer relationships and accelerate revenue growth.
Trusted and loved by over 14,000 customers across 100+ countries, Wati has established itself as the premier choice for businesses leveraging WhatsApp and other messaging channels to connect with customers on their platform of choice.
In a world where real-time interactions drive growth, Wati's story is all about business growth through conversations. At Wati, we believe that every conversation matters, whether it's engaging a first-time prospect, nurturing a qualified lead, or deepening relationships with loyal clients. We transform these conversations into opportunities for building relationships, and strong relationships lead to increased revenue.
Our Platform
The AI-native platform simplifies complex business operations by bringing all customer interactions under one intelligent roof. Designed for scalability and ease of use, our solution delivers a measurable ROI while adapting to businesses of all sizes, from emerging startups to established enterprises.
Our Backing & Partnerships
Wati is proudly backed by world-class investors including Tiger Global, Sequoia Capital, DST Global, and Shopify. As a Premium-tier Partner of Meta, Google, and WhatsApp, we maintain the highest standards of integration and platform excellence.
About The Role
We’re looking for a Full-Stack Software Engineer with a strong frontend focus (about 80% frontend, 20% backend) to help build our next-generation AI Customer Service Agent. You’ll develop key user-facing features, integrate external APIs, and improve overall performance while working closely with the product and design teams.
Job Responsibilities
- Participate in building the next-generation SaaS Customer Service Agent, responsible for the core architecture design and development of the AI Agent, ensuring seamless integration with existing products.
- Engage in full-stack development and AI Agent construction, optimizing key modules such as decision-making, task scheduling, and multimodal data processing for performance and stability.
- Integrate and call various external APIs to connect internal and external data sources.
- Continuously optimize the Agent’s usability, stability, and effectiveness based on feedback and performance metrics, ensuring high performance and scalability.
- Collaborate closely with product, design, and business teams to gather requirements, design scalable solutions, and drive rapid iteration and deployment.
Requirements
- Bachelor’s degree or above in Computer Science or a related field, with 3–5 years of relevant work experience.
- Strong full-stack development capability, proficient in backend languages such as Python or Go, and good front-end experience including JavaScript / TypeScript and frameworks such as React, with clean and structured coding practices.
- Familiarity with AI concepts and frameworks related to Agent development.
- Strong problem-solving and independent working skills, with excellent communication and teamwork abilities.
Preferred Qualifications
- Proficiency in using AI-driven development tools (e.g. Cursor) to improve front-end development efficiency.
- Experience in developing Agent systems or automation frameworks; experience in secondary development on Dify or Coze is a plus.
- Familiarity with cloud platforms such as GCP or AWS.
- Fluency in English for daily work; management experience is an advantage.
What You’ll Gain
- Opportunity to use cutting-edge AI technology to build and scale real-time communication systems supporting global users.
- Close collaboration with senior engineers to rapidly grow your technical expertise.
- Valuable experience in a fast-growing, international SaaS company.