Software Engineer Project Intern (Global E-Commerce Search Infrastructure) - 2026 Start

About the Team: Search is no longer just a feature—it is the defining battleground that will determine whether TikTok Shop becomes the first truly global e-commerce super-app.

Our Search platform is the core engine behind the "shelf-field" (product card) strategy, and the key to competing head-to-head with Amazon, Taobao, and Pinduoduo in a global market worth over $10 trillion.

Search will propel TikTok Shop from tens of billions to hundreds of billions in annual GMV by activating real shopping intent, unlocking zero-sales products, and ensuring every item becomes instantly discoverable the moment a user types or taps.

We innovate where extreme performance, massive global scale, and uncompromising consistency meet.

As a Project Intern, you will contribute to impactful short-term projects and gain hands-on experience in a fast-paced, professional environment.

This internship offers the opportunity to develop practical skills, apply your knowledge to real-world challenges, and explore your career interests.

Applications are reviewed on a rolling basis, so we encourage you to apply early.

During this internship, you will join the E-Commerce Engineering team to tackle challenges in distributed systems and information retrieval. You will: - Core Architecture: Design and develop high-performance, low-latency, and high-availability online search services. Optimize core components including the inverted index, vector retrieval (ANN/HNSW), and query understanding. - Data Pipelines: Build highly scalable and fault-tolerant data pipelines using Flink, Kafka, and Spark to ensure product changes (price, stock, and new listings) are reflected in search results in near real-time. - System Optimization: Drive latency and throughput optimizations for services handling hundreds of thousands of QPS. Troubleshoot complex distributed system issues to ensure 99.99% availability. - Innovation: Participate in the research and implementation of next-generation search infrastructure, focusing on storage decoupling, cloud-native architecture, AI Search, and multi-modal fusion. - Collaboration: Work with your mentor and ML engineers to productionize state-of-the-art models and build globalized large-scale recommendation systems. Minimum Qualifications: - Currently pursuing a Bachelor's or Master's degree in Computer Science, Computer Engineering, Software Development, or a related technical discipline. - Must be able to commit to a 12-week full-time work period during Fall 2026. - Solid programming proficiency in at least one general-purpose language: C++, Go, Java, or Python (C++/Go is heavily preferred for Infra roles). - Strong foundation in computer science, specifically data structures, algorithms, and system design. Preferred Qualifications: - Distributed Systems: Experience with search engines (e.g., Lucene, Elasticsearch, Vespa), distributed storage (RocksDB, Redis), or big data frameworks (Flink, Spark, Kafka). - Problem Solving: Demonstrated software engineering experience from previous internships, open-source contributions, or competitive programming (e.g., ACM-ICPC). - Domain Knowledge: Familiarity with information retrieval concepts (BM25, learning-to-rank) or vector similarity search (FAISS, HNSW). TikTok is the leading destination for short-form mobile video. At TikTok, our mission is to inspire creativity and bring joy. TikTok's global headquarters are in Los Angeles and Singapore, and we also have offices in New York City, London, Dublin, Paris, Berlin, Dubai, Jakarta, Seoul, and Tokyo. Inspiring creativity is at the core of TikTok's mission. Our innovative product is built to help people authentically express themselves, discover and connect – and our global, diverse teams make that possible. Together, we create value for our communities, inspire creativity and bring joy - a mission we work towards every day. We strive to do great things with great people. We lead with curiosity, humility, and a desire to make impact in a rapidly growing tech company. Every challenge is an opportunity to learn and innovate as one team. We're resilient and embrace challenges as they come. By constantly iterating and fostering an "Always Day 1" mindset, we achieve meaningful breakthroughs for ourselves, our company, and our users. When we create and grow together, the possibilities are limitless. Join us. Diversity & Inclusion TikTok is committed to creating an inclusive space where employees are valued for their skills, experiences, and unique perspectives. Our platform connects people from across the globe and so does our workplace. At TikTok, our mission is to inspire creativity and bring joy. To achieve that goal, we are committed to celebrating our diverse voices and to creating an environment that reflects the many communities we reach. We are passionate about this and hope you are too. f: TikTok is committed to providing reasonable accommodations in our recruitment processes for candidates with disabilities, pregnancy, sincerely held religious beliefs or other reasons protected by applicable laws. If you need assistance or a reasonable accommodation, please reach out to us at https://tinyurl.com/RA-request