$Co-Founder & CTO
Articles by Muhammad Rehan.
Leads systems integration and technical delivery at ASSOSIATIX—the engineering backbone connecting storefronts to the tools brands already run on.
Sep 21, 2026
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
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
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
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
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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