Stefan Šlehta
Senior Software Engineer at DuckDuckGo
Old Toronto, Ontario, Bosnia and Herzegovina
Summary
🤩
Rockstar🎓
Top SchoolStefan Šlehta is a Senior Software Engineer with eight years of experience building scalable web and retail systems, currently contributing to privacy-focused search at DuckDuckGo. He spent five years at Shopify where he led pickup-in-store development, maintained retail backends in modern Ruby on Rails, and contributed to widely used open-source libraries like js-buy-sdk and buy-button-js—improving checkout flows and product data handling. Stefan blends full-stack expertise with practical ops responsibility, having owned system health and integrations such as Amazon sales channels. Comfortable across Ruby, JavaScript, and backend integrations, he brings a pragmatic engineering approach informed by formal training in software engineering and business management. Based in Old Toronto but originally from Bosnia and Herzegovina, he pairs cross-cultural perspective with hands-on contributions to notable open-source ecommerce tooling.
8 years of coding experience
9 years of employment as a software developer
Bachelor of Technology - BTech, Computer Software Engineering, Bachelor of Technology - BTech, Computer Software Engineering at McMaster UniversityAdvanced Ontario Diploma, Software Development & Network Engineering, Advanced Ontario Diploma, Software Development & Network Engineering at Sheridan CollegeCertificate in Business Management, Business/Managerial Economics, Certificate in Business Management, Business/Managerial Economics at Mohawk College
Github Skills (12)
graphql10
javascript10
shopify-api10
wordpress-graphql10
wpgraphql10
testing10
frontend8
front8
react-r8
react8
front-end-development8
reactn8
Programming languages (5)
Github contributions (5)
Shopify/js-buy-sdk
Feb 2018 - Apr 2020
The JS Buy SDK is a lightweight library that allows you to build ecommerce into any website. It is based on Shopify's API and provides the ability to retrieve products and collections from your shop, add products to a cart, and checkout.
Role in this project:
Full-stack Developer
Full-stack DeveloperContributions:33 commits, 23 PRs, 28 pushes in 2 years 2 months
Contributions summary:Stefan primarily contributed to the Shopify js-buy-sdk, implementing features related to checkout and product handling. Their work included adding support for updating checkout attributes, modifying product data retrieval, and refining error handling within the checkout process. They also fixed typos and adjusted the default resolver for improved error messages. These changes collectively improved the SDK's checkout functionality and data integrity.
cartapicollectionsretrieveecommerce
StefanSlehta/aoc2023
Dec 2023 - Dec 2023
Contributions:11 pushes, 1 branch in 12 days
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