David Jahn
Software Engineer at MongoDB
New York, New York, United States
Summary
👤
Senior🎓
Top SchoolDavid Jahn is a software engineer in New York with 11 years of experience building observability, distributed tracing, and cloud platform tooling. He has worked on telemetry for MongoDB Cloud and performance analysis for Meta’s core infrastructure, and earlier contributed to Cloud Foundry at Pivotal/VMware. David blends back-end engineering with DevOps fluency—evidenced by open-source contributions to widely used Cloud Foundry buildpacks for Node.js and Ruby, where he improved version resolution and air-gapped native module handling. His background in computational physics and distributed Linux cluster simulations informs a pragmatic, data-driven approach to systems and tooling. Colleagues describe him as a reliable engineer who moves between low-level runtime concerns and high-level observability with equal ease.
11 years of coding experience
10 years of employment as a software developer
BS Physics and Computational Math, BS Physics and Computational Math at Brooklyn College
Github Skills (14)
ruby10
ruby-rails10
nodejs10
rails10
sem10
ruby-on-rails10
buildpack10
cicd9
bash9
rspec9
jruby8
docker6
dockers6
yaml4
Programming languages (10)
Github contributions (5)
cloudfoundry/nodejs-buildpack
Oct 2015 - Apr 2016
Cloud Foundry buildpack for Node.js
Role in this project:
Backend & DevOps Engineer
Backend & DevOps EngineerContributions:13 commits, 1 PR, 29 pushes in 6 months
Contributions summary:David contributed to the Node.js buildpack by updating dependencies like Machete and buildpack-packager. They also addressed issues related to native module headers in air-gapped environments. Furthermore, the user modified the version resolver to handle stable versions effectively, improving the buildpack's ability to select and use the best version.
foundrynode-jscloud-foundryv2bbuildpack
cloudfoundry/ruby-buildpack
Oct 2015 - Apr 2016
Cloud Foundry buildpack for Ruby, Sinatra and Rails
Role in this project:Back-end Developer & DevOps Engineer
Back-end Developer & DevOps EngineerContributions:12 commits, 13 pushes, 1 comment in 6 months
Contributions summary:David contributed to the Ruby buildpack, making changes related to testing, dependencies, and integration. Their work involved fixing a bug in the `detect` script and modifying configuration files within various Rails applications. The user also updated dependencies like Machete and JRuby, showing involvement in build process and environment setup. Further contributions included merging upstream changes and updating the JRuby version used by the buildpack.
foundrysinatrarailscloud-foundryv2b
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