Willian Van Der Velde
Distinguished Software Engineer at HackerOne
Groningen, Groningen, Netherlands
Summary
🤩
Rockstar🎓
Top SchoolWillian Van Der Velde is a Distinguished Software Engineer with 15 years of experience building robust backend systems and leading engineering efforts at HackerOne. He brings deep expertise in Ruby and GraphQL, contributing notable fixes and refactors to prominent open-source projects like spree (modular eCommerce) and graphql-ruby. As a longtime freelancer and founder of willian.io, he has practical e-commerce experience, including optimizing one of the Netherlands’ largest electrical product webshops. Based in Groningen, he blends hands-on coding with technical leadership—moving from senior engineer to distinguished engineer at the same company—and has a history of building developer-friendly APIs and performance-minded backend improvements.
15 years of coding experience
17 years of employment as a software developer
Hanzehogeschool Groningen
Dutch, English
Stackoverflow
1reputation
0reached
0answers
0questions
Github Skills (23)
ruby-rails10
develop10
back-end-development10
apidoc10
ecommerce10
rspec10
rails10
wpgraphql10
ruby10
api10
wordpress-graphql10
commerce10
graphql10
graphql-ruby10
spree10
Programming languages (12)
Github contributions (5)
rmosolgo/graphql-ruby
Sep 2016 - May 2018
Ruby implementation of GraphQL
Role in this project:
Back-end Developer
Back-end DeveloperContributions:206 commits, 23 PRs, 1 push in 1 year 8 months
Contributions summary:Willian primarily focused on refactoring and improving the `graphql-ruby` library. Their contributions included removing unused methods, simplifying test setups, and fixing generator-related issues. They also worked on fixing camelization issues and made updates to support Postgres configurations and improved schema execution. The user demonstrates expertise in working with Ruby and the GraphQL framework.
relayrailsrubygraphqlgraphql-ruby
spree/spree
Mar 2013 - Nov 2014
An open source eCommerce platform giving you full control and customizability. Modular and API-first. Multi-vendor, multi-tenant, multi-store, multi-currency, multi-language. Built using Ruby on Rails. Developed by @vendo-dev
Role in this project:Backend Developer
Backend DeveloperContributions:33 commits in 1 year 8 months
Contributions summary:Willian primarily contributed to the backend functionality of the Spree eCommerce platform. Their commits include fixing bugs in prototype selectors, refactoring the backend taxon controller, adding the ability to get properties by ID for the API, and splitting taxon IDs in API controllers. They also added an index to the database and implemented pagination and search for properties.
multi-sourceecommercemulti-languagespreecommerceshopware
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