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.