Alex Langenfeld
Member Of Technical Staff at Vercel
Minneapolis, Minnesota, United States
Summary
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Rockstar🎓
Top SchoolAlex Langenfeld is a seasoned software engineer with 14 years of experience building scalable infrastructure and orchestration systems, currently a Member of Technical Staff at Perplexity after a long tenure at Dagster Labs. He’s a backend-focused contributor to the widely used dagster.io project, driving database schema migrations and robust event/run snapshot handling for production data orchestration. Earlier roles at Facebook (including engineering manager work on GraphQL and Relay) and Oculus demonstrate his fluency with large-scale product infrastructure and cross-disciplinary teams. Based in Minneapolis, he combines systems-level rigor from embedded and GPU diagnostics work with a pragmatic open-source mindset. Colleagues rely on him to modernize legacy codepaths and make data platforms more reliable and maintainable.
14 years of coding experience
16 years of employment as a software developer
B.S Computer Engineering; Computer Sciences, B.S Computer Engineering; Computer Sciences at University of Wisconsin-Madison
Stackoverflow
251reputation
11kreached
9answers
0questions
Github Skills (12)
sqlalchemy10
python10
database-design10
sql9
cron6
etl6
dagster6
python-sphinx6
ordereddict6
job-scheduling6
pipeline6
data-science6
Programming languages (6)
Github contributions (5)
dagster-io/dagster
Apr 2019 - Jan 2023
An orchestration platform for the development, production, and observation of data assets.
Role in this project:
Back-end Engineer
Back-end EngineerContributions:16 releases, 4284 reviews, 1164 commits in 3 years 10 months
Contributions summary:Alex contributed to the codebase by migrating deprecated SQLAlchemy methods and adopting recommended replacements. They also modified code related to various Alembic versions, specifically adding and modifying columns, and adding indices, indicating a focus on database schema migrations. The changes involved interacting with event logs, runs, and snapshot functionalities, suggesting work on data storage and processing within the orchestration platform.
operationpythonobservationschedulermetadata
alexwyler/Resistance-Online
Mar 2012 - Apr 2012
Contributions:35 commits in 15 days
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