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Ben Carlsson

Job history

Staff Software Engineer, Tech Lead

Remote (Seattle, WA)
April 2020–Present

Proposed and led company-wide pivot from unsuccessful CI-based test selection product to successful lightweight Python and Ruby libraries, which landed enterprise customers like Yelp and Venmo
Used packaged Go binary as a performant backend to trace and understand code paths to skip tests that don't need to run, bringing customer test times from 1+ hours to ~10 minutes, reducing carbon footprint and speeding up engineers
Built and scaled team by 3x in a year, leading senior level engineers
Optimized the company's most expensive API endpoint from 12s+ to <50ms within four weeks of joining
Python, Go, Ruby, Docker

Founder & CEO

Remote (Seattle, WA)
December 2018–April 2020

Senior Software Engineer

San Francisco → Remote (Seattle, WA)
2014–2019

Built and scaled foundational products like Chat to 46B message deliveries / day
Migrated monolothic web app to microservices
Founded and bootstrapped internal authn/authz team
Designed and taught new-hire Go class
Mentored several engineers and interns
Ran panels; helped creators and fans interact in socially healthy ways
Ruby on Rails, Go, JavaScript, Terraform
Led to $1B acquisition by Amazon

Software Engineering Intern

Livermore, CA
2010–2013 (summers)

Licenseland (2019–present)
- Dead simple dual-licensing for open source projects
- Vue, Firebase, Stripe Connect
What's in Standard? (2013–present)
- A reference tool for Magic: The Gathering players
- Twitter bot, mobile app, and web app all powered by one API
- Firebase, Flutter, and Vue respectively
Housebot (2014–2015)
- A Twitch bot that lets chat participants vote to control my lights
- Node.js, Z-Wave API, Phillips Hue API
- In retrospect I wouldn't recommend letting the internet control pieces of your house :)