Christian Johns

I've been working with Javascript since 2012, and in production systems on the web since 2014. I have experience developing both single page applications and web services, as well as deploying, monitoring and debugging those systems. I've been working with Typescript since 2016, primarily on enterprise Angular apps. I am a contributor to an open source stream library called `xstream`, which is written in Typescript. I have lots of experience with async APIs in Node.js and the browser, and userland async primitives (Observables, streams, promises) and now ES2015 primitives (Promise).

I've managed production deployments of single page applications written in AngularJS and Angular at two different companies since 2014. I have experience scaffolding Angular projects from scratch as well as taking over primary development of existing modules. I have experience developing and maintaining Angular modules for custom UI components, API clients, and telemetry systems (application monitoring in the browser). As part of this development, I have written custom Providers, Directives, and Components. I also have experience unit testing Angular and AngularJS applications using Karma and Jasmine. I've also scaffolded integration testing for both frameworks using Protractor.

I have extensive operations and deployment experience with Git and hosted version control platforms like Github and Bitbucket. I have experience with less-friendly commands and workflows including cherry-pick, rebase, multiple origin strategies (mostly for open source projects), and bisect. I also have experience performing large history rewrites (for security purposes), fixing broken merges, recovering "lost" data using the reflog, and performing diagnostics for git repositories in website docroots (largely for debugging). For hosted version control, I have experience setting up hosted repositories and configuring access for teams. I also have experience integrating repositories with continuous integration and delivery systems use web hooks and (Github) deployment keys. I also have experience integrating with Github and Bitbucket APIs for custom applications built on top of repositories, like deployment tracking and error monitoring systems such as Sentry.