Senior Fullstack Software Engineer, Global E-commerce User Growth

Global E-commerce is a content E-commerce business with international short video products as the carrier. It is committed to becoming the first choice for users to discover and purchase good products at affordable prices. Global E-commerce business team hopes to provide users with more tailored and efficient consumption experience, enabling merchants to receive stable and reliable platform services in different scenarios such as live E-commerce, short video content E-commerce, so as to make more affordable and high-quality products sell easily and a better life within reach.The User Growth team drives TikTok Shop's growth by acquiring, activating, retaining, and referring customers to expand Gross Merchandise Value (GMV). The team optimizes conversion, reduces acquisition costs, and enhances customer lifetime value using data-driven strategies and machine learning, while collaborating across teams to refine growth tactics through experimentation and market analysis.Responsibilities:- Own the technical direction of a user growth area, designing and building scalable, high-performance backend systems and features that support user acquisition, activation, engagement, and retention.- Drive complex initiatives from architecture and technical design through implementation, testing, launch, and continuous optimization, while ensuring scalability, reliability, performance, and engineering quality.- Collaborate closely with product managers and cross-functional partners to translate growth strategies and experimentation needs into reliable technical solutions, and contribute to technical direction and architecture decisions.- Develop data and insights capabilities that enable actionable analysis of user behavior, growth performance, campaign effectiveness, and product opportunities.- Mentor and support other engineers through technical guidance, contributing to a strong engineering culture and team growth.Minimum Qualifications:- Bachelor's degree in Computer Science or a related technical field, or equivalent practical experience.- 5+ years of software development experience, with strong experience building scalable and reliable backend systems and frontend systems.- Proficiency in one or more backend programming languages, such as Java, Python, Go, or Node.js, and familiarity with modern frontend technologies.- Experience with API design and development, including REST or GraphQL, microservices architecture, and frontend-backend integration.- Experience building or maintaining testing infrastructure, frameworks, or automated testing systems.- Experience using AI-assisted development tools to improve engineering productivity, with the ability to evaluate, validate, and debug AI-generated code or solutions.- Strong analytical, problem-solving, communication, and collaboration skills, with the ability to clearly communicate technical concepts and work effectively across functions.Preferred Qualifications:- Experience in user growth, E-commerce, monetization, advertising, or other data-driven consumer products.- Track record of developing and scaling technical initiatives from 0 to 1 and from 1 to 10.- Experience building AI agents or agentic workflows and applying them to real-world engineering or product use cases.- Experience delivering end-to-end projects leveraging AI or agentic technologies to improve product capabilities, engineering efficiency, or user experience.- Experience mentoring engineers and providing technical guidance on complex projects.- Experience collaborating effectively with globally distributed engineering and cross-functional teams across multiple time zones.Req ID: A123768A