John Allen
Staff Systems Engineer at Antimetal
New York, New York, United States
Summary
🤩
Rockstar🎓
Top SchoolJohn Allen is a Staff Systems Engineer in New York with 13 years building observability, performance profiling, and scalable back-end systems across companies like Facebook, Uber, and Braid. He combines a designer’s eye for elegant solutions with a willingness to implement the “terribly clever hacks” that make large systems reliable and operable in production. At Facebook he ran fleet-wide profiling and realtime analytics work, and his open-source contributions include refactoring the widely used Go metrics library tally to improve reporting, reliability, and memory behavior. Comfortable across C++, Go, and large distributed stacks, he’s equally at home diagnosing low-level allocation issues or designing team-level scalability practices. Outside work he’s a tinkerer and creator of clever noun lists—proof of a practical, detail-oriented curiosity that drives both tooling and product improvements.
13 years of coding experience
17 years of employment as a software developer
St. Andrew's SchoolBachelor's MEng Computer Science, Bachelor's MEng Computer Science at Cornell University
Github Skills (8)
unit-testing10
go10
embedded-reporting10
reporting-tools10
meter10
metric10
interface-design9
concurrency8
Programming languages (10)
Github contributions (5)
uber-go/tally
Aug 2016 - Oct 2016
A Go metrics interface with fast buffered metrics and third party reporters
Role in this project:
Back-end Developer
Back-end DeveloperContributions:8 commits, 14 PRs, 30 pushes in 2 months
Contributions summary:John primarily focused on refactoring and improving the `tally` library, a Go metrics interface. Their contributions included making the root scope responsible for periodic reporting and implementing a `Flush()` method to the `StatsReporter` interface. The user also added new unit tests and enhanced existing ones to increase code coverage and overall reliability. They also addressed a memory allocation issue within the timer function.
golangthird-partycounterpartygo-metrics
jra3/home-assistant
Mar 2018 - Jan 2024
:house_with_garden: Open-source home automation platform running on Python 3
Contributions:5 pushes, 1 branch in 5 years 11 months
raspberry-pipythonhousegardenmqtt
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