Engineering professionals in Ecommerce software
Shopify supplies three of the ten ecommerce software engineers here, with the Shop App, merchandising and monetization among their areas; the others hold engineering titles at BigCommerce, Shopware, SCAYLE Commerce Engine, Athos Commerce, Rithum, Rebuy Engine and Commerce. Useful for decisions on commerce platform architecture, product discovery and search, order management or merchant monetization features.
Professionals to explore
Catherine Witts
LinkedInExperience: Engineering Manager · Rebuy Engine
SaaS, ecommerce and healthcare tech are the areas of technical delivery leadership Catherine Witts names as the focus. Witts has been Engineering Manager at Rebuy Engine since 2024 and was Director of Software Engineering (2023–2024) and Manager, Software Development (2021–2023) at WorkCare, Inc., plus Manager, Software Development at AllOne Health (2019–2024), which fits delivery questions.
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Eduardo Rodrigues Semensati
LinkedInExperience: Head of Engineering · Shopware
Scaling engineering organizations from startup to enterprise is how Eduardo Rodrigues Semensati describes the work, now as Head of Engineering at Shopware since 2025. At Billie, Semensati was Director of Engineering (2023–2025) and Associate Director of Product - Platform Engineering (2022–2023), and also held Senior IT Manager roles at Procter & Gamble (2019–2022), a fit for commerce platform engineering questions.
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Eric Walker
LinkedInExperience: Director of Engineering · Shopify
Merchandising is the Shopify engineering group Eric Walker has led as Director of Engineering since 2024, after Senior Development Manager there (2018–2024). Walker was also Sonder CTO at Sonder Inc. (2015–2017) and Chief Technical Officer at Navendis (2011–2014), and can speak to merchandising features from the Shopify seat and from two CTO roles.
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Jason Kim
LinkedInExperience: Director of Engineering, Shop App · Shopify
Director of Engineering, Shop App at Shopify since 2025, Jason Kim held Head of Merchant Monetization and Acquisition Engineering (2024–2025), Head of Monetization Engineering (2022–2024) and Head of Experimentation Platform and Growth Intelligence (2022) roles there. Kim was also VP E-Commerce at Randa Apparel & Accessories (2020–2022), a fit for monetization and experimentation questions.
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Miguel Oller
LinkedInExperience: Director of Engineering · Commerce
Miguel Oller has been Director of Engineering at Commerce since 2023 and Co-founder & CTO of Makeswift since 2019. Oller was also an Engineer at Landing Lion (2018–2019), Co-founder & CTO at Bloveit (2016–2018) and Co-founder & CEO at Shortweb, Inc. (2015–2016), so can speak to engineering at Commerce from a founder and CTO background.
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Robert Merten
LinkedInExperience: Vice President Engineering · SCAYLE Commerce Engine
Robert Merten has been Vice President Engineering at SCAYLE Commerce Engine since 2024. At ABOUT YOU, Merten was Director Development Shop Applications (2018–2025), Director Development Mobile (2016–2018), Lead Developer Mobile (2015–2016) and Senior Mobile Developer (2015), which makes Merten a fit for questions on shop and mobile applications on a commerce engine.
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Shaun-Paul Manore
LinkedInExperience: Senior Director of Software Engineering · Rithum
Shaun-Paul Manore has been Senior Director of Software Engineering at Rithum since 2025, responsible for all software engineering for OrderStream, and was Director, Software Engineering there (2020–2025). Manore was also Engineering Manager at CommerceHub (2018–2020) and describes 15+ years in B2B SaaS and e-commerce platforms, a fit for order management questions.
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Shirmung Bielefeld
LinkedInExperience: Former Director of Engineering · Shopify
Glossier, Inc. and Shopify each account for two of Shirmung Bielefeld's titles: Engineering Manager (2018–2019) and Director of Engineering (2019–2020) at Glossier, Inc., then Senior Engineering Manager (2020–2023) and Director of Engineering (2023–2024) at Shopify. Bielefeld has been VP of Engineering at Adaptive since 2025, and those roles give a view of ecommerce engineering from both Glossier and Shopify.
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Varun Modi
LinkedInExperience: Director of Engineering · Athos Commerce
E-commerce and product discovery account for the 15+ years Varun Modi describes; Modi has been Director of Engineering at Athos Commerce since 2026 and was Engineering Manager at Klevu (now Athos Commerce) (2020–2026). At Digital Wave Technology, Modi held Director Of Technology (2016–2020), Software Engineering Manager (2015–2016) and Senior Developer (2014–2015) roles, a fit for search and discovery questions.
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Vitalii Korotun
LinkedInExperience: Director Of Engineering · BigCommerce
Building and leading an internationally distributed professional services team for merchants is part of how Vitalii Korotun describes the work. At Adobe Commerce, Korotun was Technical Director for Magento professional services (2008–2014), Architect (2014–2017) and Sr. Manager, Strategic Engagements Team (2017–2018), and at BigCommerce was Sr. Engineering Manager (2018–2021) before becoming Director Of Engineering in 2021.
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Choose the right perspective
For Shopify questions, from the Shop App and monetization to merchandising, go to Jason Kim, Eric Walker or Shirmung Bielefeld; Vitalii Korotun and Eduardo Rodrigues Semensati cover BigCommerce and Shopware engineering. Product discovery fits Varun Modi, order management fits Shaun-Paul Manore, Robert Merten suits mobile shop applications, and Catherine Witts and Miguel Oller cover engineering at Rebuy Engine and Commerce.
Questions to take into the conversation
- 01Which parts of a commerce platform, such as checkout, inventory or search, fail first under peak sale traffic, and how do you prepare?
- 02How do you decide which merchant features belong in the core platform and which should be left to apps and partners?
- 03What tradeoffs come up when keeping product search and recommendations fast as catalogs and traffic grow?
About this directory
This is a professional research starting point based on business profile data retrieved on . Titles and companies reflect that source snapshot; roles marked former had ended by then. Check the linked profiles for current details. Inclusion does not imply Instant Expert membership or availability.