David Schlegel Email & Phone Number

Needham, Ma, Us

Watertown, Ma

Software developer on the Patient Identification Management API within the athenaHealth Platform as a Service. Working in Javascript, Node.js, Docker, and Jenkins.

Cambridge, Ma

Currently developing Cloudant Bench, an automated benchmarking system written in Erlang / Python / Bash for Cloudant/CouchDB, a highly concurrent NoSQL cloud database system. Our team has been working towards the ideal of building the tools and expertise to not only identify performance bottlenecks, but to isolate them in the product code and develop improvements.Using open source Erlang and Python building blocks we've built up a series of product benchmarks and infrastructure that runs in a continuous integration Chef/Jenkins pipeline, with the goal of providing Benchmarking-As-A-Service. I've redesigned the front end to make it easy to specify the range of variables the developer wants to benchmark, define the jobs, and monitor the results. Using Jupyter Python notebooks we visualize the results using Pandas and Numpy doing statistical analysis to decide if the differences in runs are statisically significant.I've also spent time on DevOps rotations in support of Cloudant production learning how to diagnose customer issues using Splunk, Graphite, and Collectd and developing tools to help the regular staff.

Littleton, Ma

Collaborated in developing Cloud based, continuous integration performance verification test (PerfBVT) framework for Jazz Collaborative Application Lifecycle Management (CALM)• Leveraged continuous delivery build pipeline using UrbanCode and Linux VM clusters, automating builds to install and customize software and populate DB2 database contents

Littleton, Ma

Led team providing Rational Team Concert (RTC) server load testing, system sizing, and repository growth analysis• Defined and managed tasks within Agile environment for task definition, ranking, implementation, and test lab system management, mentored team members in code design, code reviews, tool usage• System architect and lead developer for Rational Performance Platform (RPP), a multi-threaded user simulation framework using Java test blocks and execution schedules to create server load simulation, performance benchmarks, data population• Developed, documented, and released popular Jazz web service traffic monitoring and graphing tool https://jazz.net/wiki/bin/view/Deployment/JTSMonTool

Lexington, Ma

Developed remote client for Rational ClearCase, an enterprise Source Control System• Innovated approach to handling mid web service user interaction requests (IReqs)• Developed remote web clients using Eclipse and Websphere Application Server, implementing RPC calls using Java/J2EE, WebServices/WSDL, and SOAP

Lexington, Ma

• Architected Perl-based object oriented multi-platform customer-extensible Base ClearCase/ClearQuest integration, providing multi-modal user interface and APIs in a multisite environment• Wrote C++ Perl extensions for security and internationalization using XLiff, productized ClearCase Adapter Eclipse Plugin, improving performance by 99%

Masters Of Science, Computer Science

Bachelor Of Science (Bs), Architecture

High School