Experience

Vexcel Imaging

• Austria
• International Trade and Development
• 100 - 200 Employee

• Engineering Manager

  • Nov 2019 - Present



Uber

• United States
• Internet Marketplace Platforms
• 700 & Above Employee

• Sr. Software Engineer II

  • Aug 2015 - Oct 2019

  Team Lead: • Collaborated with teammates and cross-functionally to lead projects to completion • Mentored team of nine engineers • Conducted technical interviews for Senior Engineer and Engineering Manager candidates, with a peak of nine interviews per week • Lead numerous cross-team and cross-organization technical reviews Microcollect: • Lead team that spanned multiple organizations and countries to build a multi-tenant platform to collect ground truth data used to improve driver pickup experiences for riders, food delivery, and freight • Designed and developed a tasking service to cluster and distribute tasks to collectors • Designed and developed low latency services to collect and process ground truth data • Designed and developed CI/CD jobs for end-to-end testing of the microcollect system Tech Stack: Java, Kafka, Casandra, DropWizard, Jackson, Docker, Linux Vide09: • Developed an Android-based platform to collect video and sensor data to improve driver safety • Designed and developed the “over the air” ingest and processing pipelines that supported tens of thousands of simultaneous collection devices with linear scale • Successful delivery of the project required rapid innovation within a very short deadline and strong collaboration with the cellphone manufacturer Tech Stack: Java, Android API, Scala, Spark, Avro, Parquet, Sequence Files, Piper WF, Docker, Linux Blue Note: • Designed and developed batch-oriented pipelines to ingest and process hundreds of terabytes of data per day and over nine petabytes in three years • Designed and developed the Coverage Calculation feature to geospatially track collection progress and perform quality analysis • Designed and developed a Spark-based API to efficiently query over eight billion images (Please see my Uber Engineering blog post for additional context) Tech Stack: Scala, Spark, Avro, Parquet, Sequence Files, Python, Luigi, Docker, Linux, React Show less



Microsoft

• United States
• Software Development
• 700 & Above Employee

• Sr. Software Design Engineer

  • Jun 1999 - Aug 2015

  Bing Streetside Collection: • Designed and developed the infrastructure for ingesting, processing, and publishing all Bing Streetside imagery • Developed algorithms for automatic detection of objects in imagery • Designed and developed the QuadTree file format and API for efficient storage of sparse point clouds at Earth scale to 1mm resolution Tech Stack: C#, IPF, SQL Server, Windows Image Processing Framework (IPF): • Designed and developed the File System Manager (FSM) responsible for replication, corruption detection, and repair of ~330 PB of storage • Developed the scheduling service for distributed task allocation across 6,000 cores • Wrote the statistical model to ensure 99.999% availability for data sets Tech Stack: C#, SQL Server, Windows Bing Local Search: • Designed and developed the conflation pipeline for international points-of-interest that performed match/merge via Machine Learning algorithms • Developed custom algorithms for the Germany local search index that improved accuracy by 9% Tech Stack: C#, Cosmos, Windows Show less