Jonathan Schoonhoven
Staff Software Engineer at Weights & Biases
San Francisco, California, United States
Summary
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SeniorJonathan Schoonhoven is a Staff Software Engineer in San Francisco with 11 years building high-throughput web systems that handle millions of requests per minute. He leads cross-functional projects end-to-end, favoring simplicity, performance, and rigorous test coverage while shipping production-ready pipelines and services. Jonathan has driven technical strategy and implementation at startups and mission-driven organizations—from payments and HIPAA-compliant systems to AI-powered media and bioinformatics infrastructure at Chan Zuckerberg Initiative. He’s a pragmatic full-stack engineer who has designed scalable ingestion, payment, and localization systems and contributed bug fixes to widely used open-source projects like Sequelize. Known for translating complex requirements into auditable, secure architectures, he also brings an unusual blend of product design and real-world operational experience from roles spanning interactive entertainment to urban-scale built environments.
11 years of coding experience
13 years of employment as a software developer
Stackoverflow
2,080reputation
450kreached
21answers
6questions
typescript
top-5%
Github Skills (20)
sequel10
javascript10
postgresql10
orm10
sequelizejs10
typescript9
nodejs9
transaction7
strip6
react6
python6
webpack6
typescripts5
typescript-types5
mariadb4
Programming languages (7)
Github contributions (5)
sequelize/sequelize
Sep 2014 - Sep 2014
Feature-rich ORM for modern Node.js and TypeScript, it supports PostgreSQL (with JSON and JSONB support), MySQL, MariaDB, SQLite, MS SQL Server, Snowflake, Oracle DB (v6), DB2 and DB2 for IBM i.
Role in this project:
Back-end Developer
Back-end DeveloperContributions:5 commits in 1 day
Contributions summary:Jonathan primarily contributed to bug fixes and improvements within the `sequelize/sequelize` repository, focusing on the migration functionality. Their work involved addressing issues related to migration execution, particularly for "down" migrations and interactions with the database. They also made changes to adhere to "use strict" and fixed a test related to PostgreSQL. These contributions demonstrate a focus on the core database interaction and ORM functionality.
feature-richormsql-servermicrosoft-sql-serversequelize
jtschoonhoven/ledmatrix
Apr 2019 - May 2023
Python library for driving LED displays from a Raspberry Pi.
Contributions:68 pushes, 1 branch in 4 years 1 month
python-libraryraspberry-pipythondisplaysled
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