David Leen

Software Engineer

Seattle, Washington, United States19 yrs 4 mos experience
Most Likely To SwitchHighly Stable

Key Highlights

  • Led development of AWS SageMaker Studio.
  • Launched multiple machine learning services at AWS.
  • Expert in building developer tooling for large-scale applications.
Stackforce AI infers this person is a SaaS expert with a strong focus on machine learning and developer tooling.

Contact

Skills

Core Skills

Machine LearningAwsSoftware DevelopmentTooling

Other Skills

JupyterPythonDocument ClassificationAlgorithmsLDA AlgorithmTopic ModelingNodeJSJavaScriptDevelopment ToolsC++RBig DataGitMatlabLaTeX

About

Experienced Software Engineer at AWS with strong machine learning background. Love building reliable distributed services with a focus on machine learning applications, developer productivity and tooling.

Experience

19 yrs 4 mos
Total Experience
4 yrs 1 mo
Average Tenure
4 yrs 9 mos
Current Experience

Netflix

Staff Software Engineer

Aug 2021Present · 4 yrs 9 mos · Seattle, Washington, United States

Amazon web services

5 roles

Senior Software Engineer

Jan 2020Aug 2021 · 1 yr 7 mos

  • Team lead for confidential initiative.

Senior Software Engineer

Jan 2018Jan 2020 · 2 yrs

  • Amazon SageMaker Notebooks and Studio
  • Team lead for SageMaker Studio which launched at re:Invent 2019. Wrote the AWS blog post: https://aws.amazon.com/blogs/machine-learning/learn-how-to-select-ml-instances-on-the-fly-in-amazon-sagemaker-studio/?latest
  • Built the remote kernels feature for Jupyter allowing the main Jupyter server to run on one machine with the kernels running on a remote machine.
Machine LearningAWSJupyterPython

Senior Software Engineer

Jan 2017Jan 2019 · 2 yrs

  • Amazon Comprehend Document Classification
  • Launched a document classification service at re:Invent. Powered by multiple algorithms including fastText, and featuring automated model selection and hyperparameter tuning.
  • Submitted multiple patent applications for using model compression and AWS Lambda to load per-customer models on-demand and rapidly serve initial requests using a quantized model while waiting for the larger model to load into main memory on the service.
  • Built a tool which used Bayesian optimization to optimize the number of worker threads for the webserver, the queue size between the webserver, and the number of ML worker threads.
Document ClassificationAWSMachine LearningAlgorithms

Senior Software Engineer

Jan 2016Jan 2019 · 3 yrs

  • Launched AWS SageMaker LDA algorithm and AWS Comprehend topic modeling at reInvent 2017.
  • Team lead for algorithms on AWS SageMaker. High performance LDA implementation which is up to 10 times faster than Mallet.
  • Went from 0 code to reInvent keynote in 9 months.
  • Grew team from 1 to 6 engineers and 2 applied scientists.
  • Launched AWS Comprehend topic modeling. Makes topic modeling available to all AWS customers giving them insight into their documents and data.
LDA AlgorithmAWSTopic ModelingMachine Learning

Software Development Engineer

Jan 2013Jan 2017 · 4 yrs

  • Launched a company wide development tool for working with NodeJS and Javascript projects. Currently used to build over 75,000 projects (version sets) and basically used on every single team in some form at Amazon and AWS. Gave regular talks and tutorials on it at internal conferences and developer workshops.
NodeJSJavaScriptDevelopment ToolsSoftware DevelopmentTooling

University of washington

Research Assistant

Jan 2011Jan 2014 · 3 yrs

  • Research into higher-order correlations in the brain.

Woods hole oceanographic institution

Summer Student Fellow

Jun 2007Sep 2007 · 3 mos · Woods Hole, Massachusetts, USA

  • Used Matlab to analyze turbulent flows numerically simulated using Fortran.
  • Co-authored paper in the Journal Of Fluid Mechanics.

Trinity college dublin

Teaching Assistant

Sep 2006Sep 2010 · 4 yrs

Education

University of Washington

PhD (dropped out) — Applied Mathematics

Jan 2011Jan 2013

University of Washington

Master of Science - MS — Applied Mathematics

Jan 2011Jan 2012

Trinity College Dublin

M.Sc. — Theoretical Physics

Jan 2008Jan 2010

Trinity College Dublin

B.A. Mod — Theoretical Physics

Jan 2004Jan 2008

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