Moishe Lettvin
Principal Software Engineer at Medium
Boulder, Colorado, United States
Summary
🤩
Rockstar🎓
Top SchoolMoishe Lettvin is a Principal Software Engineer with four decades of hands-on coding experience and a 15-year track record in senior engineering roles across startups and large tech firms. He’s led major scaling and performance efforts at Slack, Mailchimp, and Medium, and has a knack for turning messy, legacy systems into reliable, observable services while improving security and hiring practices. At smaller companies like Daily he combined backend leadership with customer-driven API improvements and built a Python SDK for AI-enabled WebRTC bots. He contributes to open-source conversational AI tooling (pipecat) with a focus on backend reliability and tests, reflecting a commitment to code quality. Known for pragmatic technology choices and strong views on fair interviewing, Moishe blends deep systems expertise with an unusual early start—shipping assembly and Turbo Pascal code since high school.
15 years of coding experience
33 years of employment as a software developer
Dropout, Complex systems, Dropout, Complex systems at The Evergreen State CollegePhilosophy, Philosophy at University of Massachusetts Amherst
Stackoverflow
8,471reputation
611kreached
203answers
6questions
google-app-engine
top-1%
javascript
top-5%
python
top-5%
Github Skills (17)
unit-testing10
pytest10
python10
testing10
google-app-engine10
javascript9
text-processing9
ai9
voice9
html6
server-push6
socket6
api6
channel-api6
comet6
Programming languages (8)
Github contributions (5)
pipecat-ai/pipecat
Feb 2024 - Mar 2024
Open Source framework for voice agents, multimodal apps, and realtime AI. Maintained by Daily and the community.
Role in this project:
Backend & Testing Engineer
Backend & Testing EngineerContributions:41 reviews, 58 PRs, 111 pushes in 1 month
Contributions summary:Moishe's commits primarily focus on enhancing the functionality and reliability of the `pipecat` repository. The changes include modifications to the message handler, adding tests for critical components like message handling, and refactoring the codebase. The user implemented a series of tests to validate the functionality, showing a commitment to maintaining high code quality. Additionally, the user made improvements to the core functionality to finalize the User Message.
aimultimodalreal-timevoicevoice-assistant
Moishe/Moishe.github.io
Jun 2015 - Jul 2026
Contributions:3 PRs, 139 pushes, 1 branch in 11 years 3 months
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