What does a senior Shopify developer do?
A senior Shopify developer, often called a Shopify expert or a Shopify Plus developer, builds and owns the technical side of a store: the Online Store 2.0 theme in Liquid, custom apps on the Admin GraphQL API, Shopify Functions for discount, delivery and payment logic, checkout UI extensions, and the integrations that move orders and inventory to an ERP or 3PL. Some also build headless storefronts with Hydrogen. Merchants usually need one when the theme has become a patchwork of apps, after a move from Magento or WooCommerce, or when Plus-only work starts piling up.
What a senior Shopify developer owns in the first 90 days
Weeks 1-2: audit the theme, apps and checkout
Pull the live theme into Git with Shopify CLI, work on a duplicate or development store and run Theme Check. Record a baseline: field Core Web Vitals for the home, collection and product templates, the Liquid profile of the slowest template, every app that injects scripts, and any discount or shipping rule still handled by a third-party app.
Weeks 3-6: move logic to Functions and extensions
Rebuild custom discount, delivery and payment rules as Shopify Functions with typed input queries and fixture tests, then replace remaining checkout tweaks with checkout UI extensions and app or custom pixels. Shopify Scripts stopped running on June 30, 2026, so confirm nothing in the cart or checkout still assumes they exist.
Weeks 7-12: theme speed and content model
Move hard-coded content into metafields and metaobjects so merchandisers edit it in the theme editor. Remove unused app embeds, size images with image_url and srcset, lazy-load sections below the fold and fix the slowest Interaction to Next Paint offenders found in week one. Deploy theme changes through the GitHub integration with a preview review.
Ongoing: own the API calendar and Plus roadmap
Shopify ships a new API version every quarter, so they update GraphQL queries and app scopes before old versions are retired, watch webhook delivery and bulk operation jobs behind the ERP sync, review pull requests, and scope Plus features such as Markets, B2B catalogs or a Hydrogen storefront before anyone commits budget.
Shopify developer rates by seniority
| Level | What they own | Typical US salary or rate | Remote rate range seen in public sources |
|---|---|---|---|
| Mid-level (2-5 years) | Theme sections and blocks, app setup and smaller Admin API integrations, with architecture reviewed by a senior | Varies by level; average for Shopify developers $123,925 a year, about $62.72/hr, all levels (Talent.com) | $23-33/hr, median $25/hr (Lemon.io) |
| Senior (5-8 years) | Online Store 2.0 theme architecture, Shopify Functions, checkout extensions, ERP and 3PL integrations, store performance | Experienced Shopify developers earn up to $148,748 a year (Talent.com); US senior Shopify contract median $58/hr (Lemon.io) | $27-45/hr, median $35/hr; senior medians $35/hr in Europe and the UK and $30/hr in Latin America (Lemon.io) |
| Strong senior or Shopify Plus architect (8+ years) | Hydrogen storefronts, multi-market and B2B setups, replatforming from Magento or WooCommerce, standards for other developers | Varies | $42-67/hr, median $47/hr (Lemon.io) |
Sources, retrieved October 2026: Talent.com Shopify developer salary in the United States (2026 page, based on 10,000 salaries); Lemon.io Shopify developer rate calculator (Q3 2026 snapshot, middle 50% of 734 active contracts, developer-side rates, juniors excluded). These are public market figures, not Odesa quotes.
Through Odesa, senior Shopify developers start at $45/hr on month-to-month terms with a two-week trial.
Shopify interview questions to ask
A tiered discount used to run as a Shopify Script. How would you rebuild it?
As a discount Function in a custom app: an input query that reads cart lines, customer tags and a configuration metafield, logic in Rust or JavaScript compiled to WebAssembly, tests against fixture carts, and awareness of instruction limits and how the merchant edits the tiers.
The product template renders slowly. How do you tell whether Liquid, an app or images are to blame?
Profile the template with Shopify Theme Inspector, then disable app embeds one at a time on a duplicate theme. Look for nested loops over large collections, oversized images without image_url sizing, and compare field LCP and INP data before and after each change.
When does a store need Hydrogen instead of an Online Store 2.0 theme?
Strong answers name the trade-off: custom UX, content from a CMS or several frontends on one catalog, against losing the theme editor and many app blocks, owning caching on Oxygen or another host, and a React Router 7 codebase to maintain. Most stores stay on a theme.
How would you sync 200,000 products and stock levels from an ERP without hitting rate limits?
An initial load with bulk operations and JSONL files, then webhooks or scheduled deltas. They should explain GraphQL query cost and throttling, retries with backoff, idempotent updates, a reconciliation report and alerting when the sync falls behind.
What changes when you migrate a store from Magento or WooCommerce to Shopify?
Mapping products, variants and options to Shopify’s model, importing customers and order history, account activation emails because passwords cannot move, a full 301 redirect map to the /products/ and /collections/ URL structure, and replacing extensions with apps or custom code.
Where would you store data like size guides, ingredients or store locations?
Metaobjects for structured, reusable entries and metafields on products or collections, both with definitions and validation, connected to sections through dynamic sources so merchandisers edit them. Weak answers rely on product tags, hard-coded JSON or a page per item.
Shopify developer job description template
Summary: We are hiring a senior Shopify developer to own the technical side of our store, from the Online Store 2.0 theme to checkout logic and the integrations with our ERP and fulfillment partners.
Responsibilities
- Build and maintain theme sections, blocks and templates in Liquid
- Build Shopify Functions and checkout UI extensions for discount, delivery and checkout needs
- Maintain Admin GraphQL API integrations, webhooks and bulk syncs
- Track Core Web Vitals and remove app and script bloat
- Review pull requests and keep apps current with each API version
Must-have skills
- 5+ years of web development, 3+ years building on Shopify
- Liquid, JavaScript, Online Store 2.0, metafields and metaobjects
- Admin GraphQL API, webhooks and Shopify CLI with Git
- Shopify Functions or checkout extensibility on a live store
Nice to have
- Shopify Plus, Markets and B2B experience
- Hydrogen, React and TypeScript
- A completed Magento or WooCommerce migration
Working hours: Works with full overlap with US business hours.
If you are still deciding which kind of Shopify specialist to bring in first, our guide to the five expert Shopify developers a growing store uses breaks down each role, and how to hire the best Shopify experts adds interview questions by title and paid test ideas. Hydrogen storefronts call for strong React developers, and app backends often need Node.js developers. To add a developer to your team month to month, see staff augmentation.
