Senior Frontend Engineer

Join Zalo Platform to build and scale web-based products serving tens of millions of daily users, with a primary focus on Zalo PC and products built on the Zalo Mini App platform. You will play a key role in designing, developing, and optimizing high-performance frontend applications, solving large-scale engineering challenges, and delivering seamless user experiences across the Zalo ecosystem.🤖 What you will do• Design, develop, and maintain high-performance frontend applications for Zalo PC and products within the Zalo Platform ecosystem.• Build scalable, maintainable, and reusable frontend architectures serving tens of millions of daily users.• Develop user interfaces using ReactJS, JavaScript, HTML5, CSS3, and modern web technologies.• Drive technical decisions, conduct code reviews, and promote engineering best practices.• Optimize application performance, including rendering, bundle size, load time, and responsiveness.• Collaborate closely with Product, Backend, QA, and Design teams to deliver high-quality user experiences.• Mentor team members and contribute to the team's technical growth.• Research and adopt new technologies, tools, and development practices to improve product quality and engineering efficiency.👾 What you will need• 4+ years of experience in Frontend Development, with experience building large-scale web applications.• Strong expertise in ReactJS ecosystem, including Redux, State Management, Functional Programming, and Immutability.• Advanced knowledge of JavaScript (ES6+), HTML5, CSS3, Sass/SCSS, and modern frontend development practices.• Solid understanding of frontend architecture, software design principles, design patterns, and code maintainability.• Experience with responsive design, cross-browser compatibility, and web performance optimization.• Familiarity with frontend tooling and workflows such as Webpack, Vite, npm/yarn, and CI/CD.• Good understanding of APIs, networking fundamentals, browser internals, and high-traffic systems.• Strong problem-solving skills, ownership mindset, and passion for continuous learning.• Ability to mentor engineers, collaborate effectively across teams, and drive technical excellence.