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Integrations & APIs.
Engineering notes on connecting Shopify to the systems around it, including ERPs, PIMs, 3PLs and CRMs, and on API reliability topics such as rate limits, retries, idempotency, pagination and webhooks.
Sep 21, 2026 · Muhammad Rehan
What Shopify's 2026-01 Bulk Operations Update Changes
- Integrations & APIs
Shopify's 2026-01 release changes bulk operation concurrency, flips a JSONL output default, and raises upload limits for ERP/PIM sync jobs.
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Sep 20, 2026 · Muhammad Rehan
Why a CRM Re-Engagement Sync Needs Three Layers of Pagination, Not One
- Systems Integration
- API Design
- Engineering
A daily sync over 50,000+ CRM contacts needs pagination discipline at more than one level, or it silently drops and duplicates records.
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Sep 18, 2026 · Muhammad Rehan
Reading Retry-After-Ms Instead of Guessing at Backoff
- Systems Integration
- AI
- Engineering
Why a system re-engaging 50,000+ CRM contacts reads the Retry-After-Ms header on 429s instead of guessing with fixed exponential backoff.
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Sep 18, 2026 · Muhammad Rehan
Idempotency Keys: The Cheap Insurance Against Duplicate Writes
- Shopify
- Systems Integration
- Engineering
Retries are guaranteed in distributed systems. Duplicate charges, emails, and orders aren't — protect the write with an idempotency key before you need one.
Read articleSep 17, 2026 · Muhammad Rehan
The Shopify Integration Problem Nobody Budgets For
- Systems Integration
- Shopify
- Engineering
Most Shopify integrations don't fail at launch — they fail months later, when data quietly drifts out of sync and nobody notices until a customer does.
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