| shamosval@gmail.com | |
| Download resume | |
Buenos Aires, Argentina |
About
Shopify developer and front-end engineer with 6 years in ecommerce. I’m the sole developer maintaining a six-storefront multi-brand DTC portfolio, and I work the full extensibility stack — Online Store 2.0 theme architecture, Shopify Functions written in Rust, checkout and post-purchase app extensions, metafields and metaobjects, Markets and multi-currency, and the Admin GraphQL API.
I keep storefronts fast and lean, run the landing-page A/B testing program that feeds pricing decisions, and own the Git/CI-CD pipeline the whole team ships through.
Track record
Sole developer on a six-storefront multi-brand DTC portfolio. I own the theme architecture, the experimentation program, the Shopify Functions and app extensions, and the pipeline the rest of the team ships through.
Ran a Shopify storefront day to day — catalog, merchandising and campaigns through the theme customizer, third-party apps, and the HTML/CSS work in between.
The detail lives in the one-page résumé.
Case studies
Side project · headless
A headless Shopify store I built on Hydrogen 2026.10 and React Router 7 to show the commerce features I ship day to day in a React stack: multipack and build-your-kit pricing, a cart reward ladder with an automatic gift line, server-side A/B testing with no flicker, Markets, structured data and an llms.txt for shopping agents. The discounts are enforced by a Rust Shopify Function deployed to a dev store, and every push runs typecheck, unit, Rust, Playwright, accessibility and Lighthouse checks in CI.
Platform extensibility
Two of our commerce rules run as Shopify Functions: a line-item/cart transform, and a discount function that applies the mini-cart upsell discount.
Experimentation
I run price, offer and layout A/B tests in Intelligems on the highest-traffic product offers. Results go straight into pricing decisions, and the program has surfaced a profit-per-visitor uplift on the flagship offer.
Internationalization
Non-US traffic was converting well below the US rate. I shipped a suite of improvements across the international buying experience — pricing, checkout and shipping. Non-US conversion rose ~33% against its prior baseline and held.
Custom commerce logic
We needed quantity-tier pricing on storefronts whose plan doesn’t support it natively. Rather than add another third-party app to the stack, I built it with a variant-based front-end technique.
Harvard CS50x · Harvard CS50W · freeCodeCamp Front-End Libraries · JavaScript Algorithms & Data Structures · Responsive Web Design · MA International Relations, MGIMO Moscow