Theo Schlossnagle
Principal at Rally Ventures
Columbia, Maryland, United States
Summary
🤩
Rockstar🎓
Top SchoolTheo Schlossnagle is a seasoned technology executive, entrepreneur, and investor with 25 years building high-scale infrastructure and data products. He founded multiple companies including Circonus, Fontdeck, OmniTI and SparkPost, consistently serving as a hands-on technical leader from CEO to Distinguished Engineer. His open-source contributions span system-level work on illumos and Apache Traffic Server and networking tooling like gopacket, reflecting deep expertise in OS internals, security, and high-throughput networking. An ACM Distinguished Member and ASF contributor, he blends rigorous academic background (MSE, Johns Hopkins) with practical product and crypto/CDN engineering. Based in Columbia, Maryland, he also serves as a strategic advisor and board member while running community ventures like a local butcher shop—demonstrating an uncommon mix of technical rigor, entrepreneurship, and civic engagement.
24 years of coding experience
26 years of employment as a software developer
Johns Hopkins University
Stackoverflow
1reputation
0reached
0answers
0questions
Github Skills (46)
javascript10
il10
c-language10
unix10
amqp10
c1110
networking10
message-queue10
c1710
system-calls10
go10
solaris10
sys10
packet-analysis10
nodejs10
Programming languages (17)
Github contributions (5)
postwait/node-amqp
Jan 2013 - Sep 2018
node-amqp is an AMQP client for nodejs
Role in this project:
Back-end Developer
Back-end DeveloperContributions:114 commits, 40 PRs, 41 pushes in 5 years 9 months
Contributions summary:Theo contributed to the `node-amqp` repository by merging improvements and fixing bugs related to message handling and connection management. Key changes include slicing outgoing messages based on frame size advertised by the server and addressing heartbeats in broken connections. The user's work focused on improving the library's stability and reliability, with modifications to the core messaging and connection components of the AMQP client.
nodejsamqpamqp-clientrabbitmq-client
apache/trafficserver
Apr 2012 - Feb 2017
Apache Traffic Server™ is a fast, scalable and extensible HTTP/1.1 and HTTP/2 compliant caching proxy server.
Role in this project:Backend & System Engineer
Backend & System EngineerContributions:1 review, 13 commits, 8 PRs in 4 years 11 months
Contributions summary:Theo contributed to system-level code, focusing on platform compatibility and enhancements. Their work included adapting the codebase for Solaris and Illumos environments, including modifications for networking, threading, and build system configurations. The user addressed bugs related to SSL connections and also made minor improvements in areas such as error reporting and internal event handling.
proxy-serverproxyload-balancingreverse-proxyhttpd
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