Damian Kaczmarczyk
Ruby On Rails Engineer II at Housecall Pro
Krakow, Lesser Poland Voivodeship
Summary
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Rockstar🎓
Top SchoolDamian Kaczmarczyk is a Ruby on Rails engineer with eight years of full-stack experience, currently advancing backend systems at Housecall Pro after roles at Vendo, Spark Solutions, and Railwaymen. He specializes in Rails backend development for eCommerce platforms and has contributed meaningful fixes and webhook/features work to the well-known Spree project, demonstrating practical expertise in webhooks, shipment cost logic, and image validation. A Typescript enthusiast who also ships front-end work, Damian balances API-first architecture with pragmatic engineering to deliver customizable, multi-tenant solutions. Based in Krakow, he brings a steady track record of shipping production-grade features and a knack for improving core platform behavior that reduces friction for integrators and merchants.
9 years of coding experience
6 years of employment as a software developer
Technik Informatyka, Technik Informatyka at ZDZ Bielsko-Biała InformatykHigh School, High School at Edukacja 4U
English, Polish
Github Skills (7)
rails10
ruby-on-rails10
ecommerce10
webhooks10
ruby10
apidoc9
api9
Programming languages (6)
Github contributions (5)
spree/spree
Sep 2020 - Jun 2025
Open Source eCommerce Platform for B2B, Marketplace, and Enterprise. REST API, TypeScript SDK, and production-ready Next.js storefront. Self-host it. Own your stack. No vendor lock-in. Zero platform fees.
Role in this project:
Backend Developer
Backend DeveloperContributions:54 reviews, 121 PRs, 299 pushes in 4 years 9 months
Contributions summary:Damian's commits primarily focus on modifying the Spree eCommerce platform's backend functionality. The changes involve implementing features related to webhook management, specifically around disabling and enabling webhooks using RequestStore and incorporating specific relationships in webhooks. They also address issues related to shipment cost calculation and product image validations within the core codebase. The user demonstrates proficiency in Ruby on Rails, the platform's underlying technology.
ecommercenextjsrestrest-apitypescript
Vegann/wykop-v2-typescript
Apr 2020 - Jan 2021
Wykop API v2 wrapper written in Typescript
Contributions:66 PRs, 159 pushes, 58 branches in 9 months
apistarcraftwykopnodejsragemp
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