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David Krentzlin

I learn what is needed, when it's needed, to fill the roles I'm in - and I do it fast.

With roughly 18 years in the field I eat, sleep, and breathe code. I know how to approach complex systems and build components that meet today’s demands. I am comfortable being both a leader and a follower.

In the end it's mostly about people, communication, and relations - occasionally about technology.


All of the projects I have on github are for my personal educational purposes. That's the usual disclaimer to say, that they're in development and even though I try to keep the main branch functional at all times, it may contain code that's incomplete or wrong.

I'm currently actively working on the following projects:

  • braces a scheme compiler and virtual machine written in Rust
  • r2d2 a key-value store written in rust to explore LSMs and distributed storage systems
  • GraphQShell a textual GraphQL client and explorer written in Haskell


I'm currently leading a team of architects and software engineers at New Work SE, where we build and operate the GraphQL API platform, which powers our products. We're crafting tools and services for our product engineers and try to make their lives easier, which is a great area to work in.

Head over to my resume if you want to find out more.

Get in contact with me

David Krentzlin's LinkedIN David Krentzlin's Xing David Krentzlin's Twitter

Popular repositories Loading

  1. Forked from redbubble/rb-graphql-template

    A template for Scala HTTP GraphQL services.

    Scala 3

  2. Scheme

  3. Emacs Lisp

  4. Scheme

210 contributions in the last year

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Contribution activity

December 2021

certainty has no activity yet for this period.

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