local_shippingCase Study: Shipping Rate Engine

Multi-Carrier Rate Calculation at the Edge

A serverless shipping rate engine that replaces manual quotes with multi-carrier rate calculations.

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<50ms

P95 Response Time

3

Carrier Integrations

~25%

Shipping Cost Reduction

300+

Global Edge Nodes

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Manual Carrier Lookups Were Killing Checkout Speed

Shipping quotes required cross-referencing carrier tariff PDFs, estimating box counts by hand, and toggling between UPS and DSV dashboards.

A Single API Call Replaces the Entire Workflow

We built a serverless rate calculation pipeline that enriches orders, optimizes packing, and fans out to multiple carriers.

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3D Packing Optimization

Integrates Optioryx for real-time bin packing across boxes and pallets. Supports item-class constraints, rotation rules, and fill-rate optimization to minimize dimensional weight surcharges.

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Edge-Compute Rate Engine

Deployed on Cloudflare Workers with multi-layer UPS OAuth caching (in-memory → KV → refresh). Zero cold starts, auto-scaling, and sub-50ms P95 latency across 300+ global PoPs.

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Multi-Carrier Aggregation

A single POST fans out to every configured carrier — from real-time rating APIs to zone-based freight tables with cross-border toll calculation. A pluggable adapter pattern makes adding new carriers a config change, not a rewrite.

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Shopify Product Sync

Automated GraphQL sync with cursor-based pagination and throttle-aware batching keeps product dimensions in lockstep with the Shopify catalog — eliminating spreadsheet drift.

The Stack

10 Technologies Powering the Engine

TypeScriptEnd-to-end type safety
Cloudflare WorkersServerless edge compute
HonoLightweight API framework
Cloudflare D1Serverless SQLite database
Drizzle ORMType-safe query builder
TypeScriptEnd-to-end type safety
Cloudflare WorkersServerless edge compute
HonoLightweight API framework
Cloudflare D1Serverless SQLite database
Drizzle ORMType-safe query builder
ZodRuntime schema validation
Optioryx3D bin packing engine
Shopify GraphQL APIProduct catalog sync
Cloudflare KVDistributed token cache
VitestUnit & integration testing
ZodRuntime schema validation
Optioryx3D bin packing engine
Shopify GraphQL APIProduct catalog sync
Cloudflare KVDistributed token cache
VitestUnit & integration testing

Architectural Impact

From manual carrier lookups to sub-second automated rates

1 API Call

Replaces Multi-Step Manual Workflow

What previously required cross-referencing carrier tariff PDFs is now a single call that returns priced shipping options across all active carriers in EU and USA with a Multi-Region architecture.

~25%

Shipping Cost Reduction

3D packing optimization right-sizes every shipment. Dimensional weight charges fell roughly 25% by eliminating guesswork box selection and maximizing fill rates.

<50ms

P95 API Latency

Cloudflare Workers edge deployment with multi-layer OAuth caching delivers consistent sub-50ms responses globally — fast enough for real-time Shopify checkout integration.

Zero

Servers to Maintain

Fully serverless architecture on Cloudflare Workers + D1 + KV. No provisioning, no patching, no capacity planning. Infrastructure scales automatically from zero to peak traffic without intervention.

Shipping Logistics Eating Your Margins?

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