Haiyan Chen Email & Phone Number

Bellevue, Wa, Us

We're building a digital platform for local marketplaces and communities to thrive through nurturing bonds, utmost convenience, and optimum efficiency in the new hybrid world. Our focus is empowering farmers markets with tools to improve community engagement and operational efficiency, driving circularity within our food system.Iinseason - It has two i's at the beginning, in different sizes and colors, to symbolize diverse people in the communities we dedicate to serving.

Bellevue, Washington, Us

Successfully led transformative efforts across diverse domains including order fulfillment, advertising, and data organization. In the fulfillment team leading the simplify project - analyzing the latency and failure cases of the current system for refactoring and redesigning the order-related microservices: order placement, fulfillment/shipping, returns, and buyer protection claims. Being the tech lead in the ads team is eye-opening and companied by tremendous learning. Below are some high-level statistics of my tenure as the Tech Lead of the ads team.- The team size quadrupled, with maturing engineering practices and increasing velocity.- The efficiency of the core ad server services has increased by more than 50%. Ads backend services are consistently achieving four 9 availability.- Evolved 40% of ads ecosystem architecture without interruption on existing prod traffic and ads revenue. The process is now standard, and the team has applied it repeatedly. - Implemented a few new ads product lines that contribute to substantial revenue growth.After experiencing the pains of data processing in my last two teams, especially in advertising. I was set to build a better data platform that is more efficient, easier to use, and an enabler for faster product development iterations. - Orchestrated successful migration to a new experiment platform across engineering teams. Enabling modern experimentation functionalities. - Pioneered adoption and integration of a new data streaming platform, accelerating engineering velocity by 4x and enabling new applications.- Coordinated collaboration with multiple vendors and guided internal teams to ensure timely completion of the POC and MVP for embedding-based search.Beyond the engineer role, I led 2023 hackathon team in implementing the POC for a new vertical, securing first place in the following innovation program with a winning business case as the company's 2024 AOP candidate.

Seattle, Wa, Us

Designed and Implemented features for SPICE (Super-fast Parallel In-memory Computation Engine), a modern columnar database engine enabling elastic scaling for real-time traffic of AWS QuickSight Analytic Service.• Fully automated data migration for all regions. Designed the availability-zone-based control plane workflow with failures handled by the run-books of normal operations.• Built a framework for late materialization. Implemented a dynamic optimization fitting SPICE’s own storage format to cut the execution time of relevant queries by up to 97%.• Added operator metrics to enable query profiling. This is crucial for analyzing long running queries and for identifying performance bottlenecks.• Built a framework for window functions. Mentored a junior engineer to implement window functions based on this framework.

San Diego, California, Us

My journey with Teradata started with the R&D lab at Madison, Wisconsin for 3 years. Then for more than a decade, Teradata gave the freedom to work virtually while my family moved around the country next to research labs and universities. I had great time collaborating with the bright, warm-hearted and open-minded people, coming up with practical solutions for Teradata's share-nothing MPP architecture. Through the years, I implemented, designed, or led many features, such as sparse Join Index, cardinality estimation, Multiple Hash Maps, IN-list optimization which span from parser to query optimizer to query execution engine. With extensive customer problem study, I proposed several forward-looking features prior to my departure.

Santa Clara, Us

In graduate school, I implemented a web-based email system for the company. Then they invited me to work in the Silicon Valley before the internet bubble burst, I was a backend engineer for the e-commerce platform.

Armonk, New York, Ny, Us

While waiting for my visa to U.S, I joined IBM Shanghai and built the yellow-page part of a web portal, using JavaScript and EJB.

Guest, Database Management System

Master, Computer Science

Bachelor, Computer Science, Mathematics