Brandeis University

Singapore American School

Senior Data Engineer at Facebook

Seattle, Washington, United States

Optimized multiple ML heavy pipelines including feature & candidate generation for boosted decision trees and neural networks.Wrote graph traversal algorithms in Apache Giraph.Domain expert in multiple facets of data engineering, including machine learning, Spark, Presto.Created frameworks that monitor candidate & feature generation processes that are leveraged by multiple teams.Built monitoring and alerting dashboards and processes that make sure any issues are flagged in a timely manner.

Facebook

Data Engineer Tech Lead

Collaborated with Product teams across the company to instrument clickstream logging for analytics.  Built tooling around the data that enabled Support Engineers to troubleshoot customer's accounts. Identified and instrumented automated processes that regularly aggregated important datasets that various teams used to do analysis.Designed and implemented SOX compliant reporting that produced auditable and accurate customer records for financial reporting. Partnered with Services, Sales, and Marketing Operations to ensure that their analysts and data scientists had access in BI systems to both aggregated and raw data sets from a multitude of data sources across the company.Grew the business intelligence team from 2 to 12 people. Interviewed and trained data engineers and analysts. Responsible for the performance of business intelligence analysts and engineers. Managed remote team of 3 in Ireland as well as team of 9 locally.Tested and prototyped enterprise data lakes and ODS proof of concepts on Presto and Snowflake.

HubSpot

Data Architect

Architected and implemented a data lake/warehouse solution from scratch that runs on top of Amazon Redshift that supports 1,000+ users and 10,000+ queries per dayWorked with key stakeholders, analysts, and engineering teams to identify, prioritize, and ingest valuable sources of data into the warehouse in order to promote buy-in and drive adoption of the business intelligence teamBrought together and integrated data from various systems across the company through custom coded ELT jobs using Hive, R, SQL, and Bash that allowed analysts to perform previously impossible or otherwise prohibitively time consuming analysisImplemented, maintained, and supported a BI solution using Looker, which enabled 60+ analysts, engineers, and managers across the company to actively develop on a platform that leverages diverse data in order to answer tough analytical questions, automate management reports, and measure and track the effect of initiatives on key performance indicators. Trained analysts on how to do exploratory and reproducible data analysis using SQL and Looker

Data Warehouse Engineer

Built tools that manage, interpret, and integrate many unique data streams into Comlinkdata’s core data that increase the volume and accuracy of current and historic customer switching information by 10%Leveraged cloud computing on Amazon’s EC2, Redshift, and S3 services to achieve speed, scalability, and redundancy on mission critical data processesAutomated and implemented data validation processes through outlier detection in R and SQL that saves 10 hours or more of manual processing a weekArchitected and implemented a standardized ETL process for Comlinkdata’s “Voice of the Customer” product that aggregates and simplifies telecommunications related data from Twitter, Facebook, advertising databases, and news outlets for client consumption

Comlinkdata

Data Engineer

Provided insights based on real-time mobile phone customer switching activity to aid in clients'​ understanding of the competitive dynamics between telecommunications carriers in North AmericaManaged, maintained, sourced, scraped, and integrated supplemental databases that strengthen the value and utility of customer switching dataWorked with and between the "Research, Validation, and Analysis"​ as well as "Client Insights" groups on a daily basis to determine the drivers of intra-carrier customer switchingLeveraged big data tools including Tableau, SQL, R, and ArcGIS to create elegant, simple, and functional graphs, maps, and charts from multiple large and complex data sources for client useLed weekly company-wide discussion on significant telecommunication trends and events

Data Anaylst

Conducted market research to support international marketing campaign to gain share of the Singapore marketLocalized, designed, and edited content for local website (selecting and tailoring products)Created and managed the online marketing campaigns for the Singapore market including the use of search engine marketing, search engine optimization, and paid-search marketing through Google's, Yahoo's, and Facebook's advertising platforms.Used various business intelligence tools to monitor and tweak the performance of all aspects of the Singapore website including ad and product performances

Vistaprint

Asia Pacific Marketing Intern

Wrote software to aggregate data received from accounting and brokerage firms.Created and maintained a database to house all relevant client information and exchanges.Introduced to various facets of a macro hedge fund such as trading in foreign exchange, equity indices, and options.Created an informational package to high net worth individuals about the fund that was not too technically detailed, but had enough information to entice investors.

Abax Global Capital

Intern

Created specialized presentations for consultants to use on projects.Used Factiva extensively to research and report on current events to aid in consultant projects and presentations.

Ken Yeoh