I diagnose and fix the technical problems that make ecommerce stores lose data, break workflows, or waste ad spend.
I work across Shopify, GA4/GTM, Google Ads, Google Merchant Center, Meta tracking, APIs, webhooks, and Cloudflare backends — with a production-first approach: isolate the root cause, make the smallest reliable change, validate the result end-to-end, and document what changed.
Available for: Shopify debugging · Tracking fixes · GMC diagnostics · API integrations · Webhook automation · App/backend work
View my Upwork profile → · Browse all technical projects →
These portfolio projects are sanitized technical demonstrations built to show the problem, architecture, validation logic, and delivery outcome without exposing client credentials, private data, or proprietary code.
Shopify + Google Ads Conversion Tracking GA4, GTM, Google Ads, ecommerce events, transaction value and QA. |
Google Merchant Center Feed Diagnostics Feed validation, product/landing-page consistency and remediation workflow. |
GA4 + GTM for Shopify Ecommerce Clean dataLayer architecture, ecommerce events and purchase validation. |
Shopify App Billing Starter OAuth, recurring billing, entitlement logic and lifecycle events. |
- Shopify development & debugging — theme/cart issues, custom storefront behavior, Liquid, Admin API and GraphQL
- Tracking & analytics — GA4, GTM, Google Ads conversions, ecommerce dataLayer and purchase/revenue validation
- Google Merchant Center — feed diagnostics, product-data consistency, disapproval investigation and remediation workflows
- Meta tracking — Pixel + Conversion API, browser/server event matching and event deduplication
- Automation & integrations — REST/GraphQL APIs, webhooks, retries, idempotency and background workflows
- Serverless backends — Cloudflare Workers, D1, access control, API repair, rollout and rollback planning
The six core repositories below include visual proof, runnable demos, and GitHub Actions validation.
| Project | Proof |
|---|---|
| Shopify + Google Ads Conversion Tracking | Visual proof · runnable demo · CI |
| Google Merchant Center Feed Diagnostics | Visual proof · runnable demo · CI |
| GA4 + GTM for Shopify Ecommerce | Visual proof · runnable demo · CI |
| Shopify Admin GraphQL Toolkit | Visual proof · runnable demo · CI |
| Shopify Webhook Automation | Visual proof · runnable demo · CI |
| Shopify App Billing Starter | Visual proof · runnable demo · CI |
| Project | What it demonstrates |
|---|---|
| Meta Pixel + CAPI Blueprint | Browser/server events, event_id deduplication and signal QA |
| Shopify Cart Drawer Architecture | Liquid, AJAX Cart API and responsive cart UX |
| Shopify Core Web Vitals Audit | LCP, INP, CLS, third-party scripts and regression testing |
| Cloudflare Workers + D1 Shopify Backend | Serverless APIs, D1, access control, rollback and production QA |
- Diagnose before changing things — separate storefront, tracking, feed, platform and campaign-side problems.
- Make the smallest reliable fix — avoid unnecessary changes that create new production risk.
- Validate end-to-end — compare browser events, platform diagnostics, API responses and store data.
- Leave a clear verification path — document what was wrong, what changed and how to test it later.
Shopify · Liquid · JavaScript · GraphQL · REST APIs · Webhooks · GA4 · GTM · Google Ads · Google Merchant Center · Meta Pixel · Conversion API · Cloudflare Workers · D1
For focused Shopify troubleshooting, tracking repair, GMC diagnostics, API integration, automation, or ecommerce backend work:
Upwork: https://www.upwork.com/freelancers/baikenbelte
Portfolio repositories are intentionally sanitized. Production credentials, customer data, private URLs and proprietary client code are excluded.