Valdir Stumm
Full Stack Engineer at Postpone
Santa Catarina, Brazil
Summary
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Rockstar🎓
Top SchoolValdir Stumm is a Full Stack Engineer with 14 years of experience building production-grade web platforms and APIs, currently based in Santa Catarina, Brazil. He blends deep Python backend expertise—shaped by years at Zyte/Scrapinghub contributing to flagship projects like Scrapy and Parsel—with front-end and DevOps experience using Vue.js, AWS, Docker and CI tooling. As an engineering manager at BriteCore he led teams delivering a dynamic insurance quoting platform, improving developer experience and production readiness while mentoring engineers. Valdir’s open-source work ranges from core scraping libraries to a Python-to-Java transpiler (voc), showing a pragmatic focus on improving documentation, CLI tooling, and robust data extraction. He also has a background in teaching and training, having created Scrapy learning materials and a web scraping playground used by the community.
14 years of coding experience
10 years of employment as a software developer
Master's degree Computer Science, Master's degree Computer Science at Universidade Federal de Santa CatarinaBachelor's degree Computer Science, Bachelor's degree Computer Science at Universidade Federal de Santa Maria
Stackoverflow
4,607reputation
417kreached
79answers
3questions
scrapy
top-5%
filter
top-1%
python
top-5%
indexing
top-5%
Github Skills (65)
restructuredtext10
python10
javas10
scrapy10
lxml10
transpiler10
command-line-tool10
xpath10
markdown10
webscraper10
app-framework10
rs10
webscraping10
codegen10
bytecode10
Programming languages (4)
Github contributions (5)
scrapinghub/sample-projects
Sep 2016 - Jul 2017
Sample projects showcasing Scrapinghub tech
Role in this project:
Backend Developer
Backend DeveloperContributions:13 commits, 2 PRs, 13 pushes in 10 months
Contributions summary:Valdir primarily contributes to the development of spiders for web scraping using Scrapy. They create spiders to extract data from websites, including handling login and pagination, and implementing techniques like CSRF token handling and JavaScript rendering. The user also contributes to a price monitoring project, developing a monitoring system that uses Scrapinghub and AWS services.
pythonscrapinghubsample-projects
scrapinghub/extruct
Apr 2016 - Jun 2017
Extract embedded metadata from HTML markup
Role in this project:Back-end Developer
Back-end DeveloperContributions:9 commits, 6 PRs, 5 pushes in 1 year 2 months
Contributions summary:Valdir primarily focused on enhancing the functionality of the `extruct` command-line tool and refining its internal structure. They introduced a new command-line tool and adapted the code to use an updated method for extracting items. Additionally, the user incorporated new features by adding a command to the tool to allow for a 'python -m extruct' command. Their work also included refactoring to use updated library calls and improved the tool's documentation.
json-ldmicroformatsheadmeta-tagssemantic-web
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