Stefan Rijnhart
Freelance Odoo Development Specialist at Opener B.V.
Amsterdam, North Holland, Netherlands
Summary
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Rockstar🎓
Top SchoolStefan Rijnhart is a freelance Odoo development specialist with 11+ years’ hands-on experience and a career-long focus on large-scale Odoo instances, complex major-version migrations, and the financial modules that power ERP deployments. Based in Amsterdam, he combines deep backend expertise—evident from sustained contributions to core Odoo and OCA projects like server-tools, openupgradelib and server-ux—with a track record of improving upgrade tooling and Python compatibility for production systems. Stefan often tackles installations with very large datasets (>1.5 billion records) and has driven community initiatives such as OpenUpgrade and Community Backports, showing a pragmatic commitment to open-source collaboration. Colleagues benefit from his emphasis on code quality, stability and mentoring, and his background in computational linguistics gives him a distinctive systems-thinking approach to complex data and migration challenges.
11 years of coding experience
5 years of employment as a software developer
Master, Computational Linguistics, Master, Computational Linguistics at University of Amsterdam
English, Dutch
Github Skills (25)
database-migrations10
erp10
api-rest10
postgresql10
back-end-development10
python10
api-design10
restful-api10
odoo10
rest-api10
database-migration10
odo10
business-process9
business-logic9
addon9
Programming languages (12)
Github contributions (5)
OCA/openupgradelib
Sep 2015 - Oct 2022
A library with support functions to be called from Odoo migration scripts.
Role in this project:
Backend Developer
Backend DeveloperContributions:1 release, 84 reviews, 64 commits in 7 years 2 months
Contributions summary:Stefan primarily contributes to the Odoo upgrade library, focusing on backend functionalities to support Odoo migration scripts. Their work involves adding features, fixing bugs, and refactoring existing code within the library. Key contributions include adding methods for common migration tasks, adapting the codebase to different Odoo versions, and improving Python 3 compatibility.
odoo
OCA/server-ux
Jan 2016 - Jun 2021
Role in this project:Back-end Developer
Back-end DeveloperContributions:101 reviews, 51 commits, 23 PRs in 5 years 5 months
Contributions summary:Stefan contributed to the `date_range` module within the Odoo server-ux repository, focusing on enhancing its search functionality and automatic generation capabilities. They added a search mixin class to enable searching date ranges and refactored the wizard for date range generation by converting onchange methods to stored compute methods. Furthermore, the user implemented fully automatic date range generation based on date range types, improving the module's usability.
pythonodooerp
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