Hello, World!I am Alejandro Cabello Jiménez
Posts
Explore my latest articles, technical publications, and conference talks on large-scale backend architecture and Python.
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Talks EuroPython 2026
Returning to EuroPython with Alberto Maldonado to share how we cut our flight search engine's execution time from over 4 seconds to under 500 milliseconds by tuning Python's GC, replacing Pydantic with TypedDict, and restructuring how we traverse and parallelize work in AWS Lambda.
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Open Source gh-inspector: inspect GitHub orgs without cloning
A CLI tool that scans GitHub organizations for dependency versions, CODEOWNERS, and Python version targets, all without cloning a single repo.
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Blog How I Use PyCharm at TravelPerk
JetBrains interviewed me about how I use PyCharm to build the company’s flight search engine.
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Blog DX Surveys and the Law of Small Numbers
Why developer experience surveys with small samples can lead to misleading conclusions, and how to interpret them with statistical perspective.
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Talks PyConES 2025
Real-world Python performance optimizations from our flight search engine at Perk, presented with Alberto Maldonado at PyConES 2025 in Seville.
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Talks EuroPython 2025
This talk at EuroPython 2025 shows the path for a large Python migration, over 100 repositories at TravelPerk from Pydantic V1 to V2. It covers strategies for handling breaking changes, refactoring codebases, testing safely, and unlocking performance improvements.
Experience
A selection of companies and organizations I have worked with, contributing to exciting projects and innovations.
