travis jeffery
who:
I'm an infrastructure engineer. I've been a founding engineer at Segment, Confluent, now Oscilar. Early in my career, I worked at 37signals.
I wrote Distributed Services with Go, which teaches distributed systems by building a persistent event-stream service, from scratch to production.
I learned to program through open-source. My GitHub has years of tools, libraries, and infrastructure work.
You can reach me by email or on Twitter.
posts:
- Hiring is a guess. Firing is a choice. Jan 30, 2026
- I built our JIT access system in a day Jan 23, 2026
- Segment, 2014-2016 Dec 9, 2025
- 25 years of Emacs Nov 16, 2025
- I'll take pkg over internal Nov 1, 2019
- Keep passwords and secrets out of your logs with Go Jun 4, 2018
- The best books I read in 2017 Feb 1, 2018
- “username or password incorrect” is bullshit Dec 21, 2017
- Hiring woes: the costs of bad hires and how to avoid them Oct 4, 2017
- Manage Datadog with Terraform Sep 7, 2017
- How to persuade in online discussions Jun 14, 2017
- Building a Kafka that doesn’t depend on ZooKeeper Jan 19, 2017
- EC2’S magical address to get instance metadata Nov 29, 2016
- How Kafka’s Storage Internals Work Oct 13, 2016
- Monitoring with InfluxData's TICK stack Sep 23, 2016
- Techniques to Achieve High Write Throughput With Elasticsearch Jun 8, 2016
- Using Golang and JSON for Kafka Consumption With High Throughput May 9, 2016
- Graphing Kafka offset lags with StatsD Mar 26, 2016
- SSH into EC2 instance with instance ID Nov 30, 2015
- Outbound connections from Docker with VirtualBox not working? Nov 17, 2015
- Building a custom Zendesk app Nov 10, 2015
- Library and Lambda function to show your Rdio heavy rotation on your website Oct 24, 2015
- Error responses on Node.js with Koa Oct 21, 2015
- Building infrastructure with Docker, AWS ECS, and Hashicorp's Terraform Oct 7, 2015
- Piping into a Docker container Sep 25, 2015
- Writing your own Emacs interactive functions with completion Sep 11, 2015
- Animated nyan cat in the terminal Jun 25, 2015
- Re-architecting Segment's API Mar 25, 2015
- How to hide Chrome's notification icon in the menu bar Jul 24, 2014
- NSURLSession and NSOperationQueue working together = TRVSURLSessionOperation Jun 17, 2014
- Added support for promises in mocha v1.18.0 Mar 14, 2014
- Jasmine-jQuery v2 adding support for Jasmine v2 Jan 13, 2014
- Writing @ prefixed macros Jan 10, 2014
- My Xcode plug-in to have Clang format/style your code using the new clang-format Jan 7, 2014
- Text processing with NSLinguisticTagger: implementing Writer Pro's syntax control Dec 25, 2013
- Preventing 'IB auto generated at build time for view with fixed frame' when using Auto Layout Nov 28, 2013
- URL linking in a non-editable NSTextView Nov 9, 2013
- Using UIImage, UIColor, UIFont Code on Mac OS X Nov 2, 2013
- Using TextKit to put an image in a text view Oct 20, 2013
- How to know when a UIScrollView (includes UITableView, UICollectionView) finished scrolling Oct 19, 2013
- Server-sent event event source API client in ObjC for iOS and Mac using NSURLSession Oct 12, 2013
- Async testing with Xcode and any testing framework such as XCTest, SenTestingKit, Expecta, etc. Oct 11, 2013
- `git author sha`: get author info for a given sha in git Oct 5, 2013
- Xcode attaching to app running in simulator not working Oct 3, 2013
- Basic authentication with AFNetworking 2 Sep 27, 2013
- Disable microphone muting when typing in Google+ Hangouts Sep 24, 2013
- Scroll to the bottom of a UICollectionView Sep 19, 2013
- Testing JavaScript projects with Grunt, Jasmine, and JSHint Sep 3, 2013
- Installing Ruby with rbenv and Homebrew on OS X Mavericks Jun 24, 2013
- When Google Chrome won't open iTunes links Jun 4, 2013
- Getting the status bar's height in iOS May 6, 2013
- Converting AVFoundation's power levels to/from logarithmic and linear scale Feb 8, 2013
- Notify yourself of successful/failed Xcode builds by email Jan 17, 2013
- Overriding UIViewController's view property, done right Dec 28, 2012
- Quick staging and other file operations in git Nov 1, 2012
- Making Custom Transitions Between UIViewControllers Oct 22, 2012
- Alias in ZSH with completion Aug 8, 2012
- iOS how-to: mask and shadow views Aug 6, 2012
- Adding a drop shadow to a table view Jul 23, 2012
- Getting the index path of a table view cell via a subview event Jul 22, 2012
- Rendering errors with JSON and Rails Apr 27, 2012
- How-to test starting Backbone's history Apr 16, 2012
- Web Inspector's new dock to right feature Apr 1, 2012
- errors.js: client side errors object Mar 30, 2012
- What is this? I don't even... bind this to your object in JavaScript! Mar 29, 2012
- JavaScript conditional assignment Mar 20, 2012
- Generate Rails migrations that automagically add your change Mar 16, 2012
- Using git's include for private configuration information (like github tokens) Mar 9, 2012
- Find Rails partial references in Vim Feb 23, 2012
- Using PostgreSQL's Hstore with Rails Feb 20, 2012
- Vim and the power of :g Feb 17, 2012
- Modern grep Feb 9, 2012
- Search a git repo like a ninja Feb 2, 2012
- ZSH's extended glob breaking commands Jan 30, 2012
- Hide comments with Vim folding Jan 17, 2012
- Building regexps in JavaScript Jan 5, 2012
- Expressive domain specific languages (DSL) in Ruby Dec 28, 2011
- Keeping your git repo clean of .orig files! Dec 3, 2011
- Saving files in nonexistent directories with Vim Nov 28, 2011
- Markdown headers in Vim Nov 18, 2011
- Mess up a rebase? Reflog your problems away Oct 31, 2011
- M-x occur for Vim Oct 31, 2011
- Hello. Yes, this is blog. Oct 29, 2011