Commerce Engineering for Brands That Outgrow Templates.
We architect sub-second Hydrogen storefronts on Shopify Plus and orchestrate automated inventory synchronization across Amazon SP-API, Etsy, and global 3PL fulfillment.
Chronograph 01
Shopify Plus order.created (HMAC-SHA256 verified)
Redis atomic lock acquired for SKU: AST-CHR-01
Amazon FBA & Etsy v3 inventory decremented with zero race conditions.
Engineered Across Primary Commerce Infrastructure
Selected E-Commerce Engines
Astrae Luxury
astrae-luxury.comNext.js Hydrogen migration with custom 1-click upsell architecture and sub-second edge caching.
Lumina Home Goods
luminahome.storeAutomated Multi-Channel Fulfillment routing with real-time inventory locking to prevent overselling.
Nordic Artisan Crafts
nordiccrafts.coAutomated 13-tag semantic match algorithm and zero-lag dual Etsy-to-Shopify inventory hub.
Kura Audio Gear
kura-audio.ioTailored Shopify Functions for volume tiers, dynamic discounting, and bespoke checkout extensions.
Velox Outdoor
veloxgear.comIdempotent event-driven stock rebalancing connecting Shopify Plus, Amazon SP-API, and Etsy v3.
Midas Botanics
midasbotanics.comEliminated 24 legacy app scripts, rebuilt core theme in Liquid v2 with sub-500ms edge caching.
Astrae Luxury
astrae-luxury.comNext.js Hydrogen migration with custom 1-click upsell architecture and sub-second edge caching.
Lumina Home Goods
luminahome.storeAutomated Multi-Channel Fulfillment routing with real-time inventory locking to prevent overselling.
Nordic Artisan Crafts
nordiccrafts.coAutomated 13-tag semantic match algorithm and zero-lag dual Etsy-to-Shopify inventory hub.
Kura Audio Gear
kura-audio.ioTailored Shopify Functions for volume tiers, dynamic discounting, and bespoke checkout extensions.
Velox Outdoor
veloxgear.comIdempotent event-driven stock rebalancing connecting Shopify Plus, Amazon SP-API, and Etsy v3.
Midas Botanics
midasbotanics.comEliminated 24 legacy app scripts, rebuilt core theme in Liquid v2 with sub-500ms edge caching.
Engineering Practices
Four core disciplines where we partner with high-growth merchants to solve non-trivial technical challenges.
Headless Storefronts & Edge SSR
We engineer bespoke Next.js and Shopify Hydrogen storefronts deployed to global edge locations. Sub-500ms time-to-first-byte, instant route transitions, and zero third-party theme bloat.
- Shopify Hydrogen & Oxygen Deployment
- Next.js App Router Architecture
- Global Edge CDN Caching
- Tailored Mobile-First UX
Multi-Channel Inventory Synchronization
Event-driven webhook engine maintaining real-time inventory parity across Shopify Plus, Amazon SP-API, and Etsy v3 with distributed mutex locking to eliminate overselling.
- Shopify ⇄ Amazon SP-API Integration
- Etsy API v3 Two-Way Sync
- Automated Multi-Channel Fulfillment (MCF)
- Idempotent Webhook Architecture
Checkout Extensibility & Functions
Custom Shopify Functions and Checkout UI Extensions that handle complex B2B wholesale pricing, dynamic volume tiers, and frictionless 1-click post-purchase upsell funnels.
- Shopify Functions (Rust & WASM)
- Custom Checkout UI Extensions
- Tiered Volume & Wholesale Pricing
- Real-Time Freight & Tax Calculation
Performance Audits & Clean-Room Rewrites
We audit and eliminate bloated tracking tags and unoptimized apps, rewriting core theme architecture in clean Liquid v2 to deliver consistent 95+ PageSpeed scores.
- Elimination of Legacy App Scripts
- Critical CSS & Asset Deferral
- Core Web Vitals Remediation (LCP < 1.2s)
- Server-Side Tagging & Tracking Setup
How the Sync Engine Prevents Overselling
A distributed, event-driven pipeline engineered to maintain 100% inventory parity during high-concurrency product drops.
HMAC Ingestion & Idempotency
Incoming order webhooks from Shopify Plus and Amazon SQS are verified against cryptographic signatures. Every payload is assigned an idempotency key to eliminate duplicate decrements.
Distributed Redis Mutex
During flash sales, concurrent purchases compete for the same SKU. Our engine acquires a sub-millisecond atomic mutex lock in Redis, ensuring safe inventory reservations with zero race conditions.
Two-Way Fan-Out & Audit Loop
Committed inventory changes fan out concurrently to Amazon SP-API and Etsy v3. An automated background worker reconciles all connected channels every 60 seconds to self-heal any external rate limits.
// Distributed Atomic Mutex for SKU Reservation
export async function acquireInventoryLock(sku: string, orderId: string): Promise<boolean> {
const lockKey = `lock:inventory:${sku}`;
const lockValue = `order:${orderId}:${Date.now()}`;
// Atomic SET NX PX with 1500ms safety TTL
const acquired = await redis.set(lockKey, lockValue, "NX", "PX", 1500);
if (!acquired) {
logger.warn("Lock collision detected for SKU", { sku, orderId });
return false; // Backoff and enqueue into jittered retry buffer
}
return true; // Mutex guaranteed: zero race condition across concurrent checkouts
}Merchant Outcomes
Verified perspectives from operators who rely on JB.er infrastructure.
“JB.er migrated our monolithic Liquid theme to Hydrogen edge servers. Our cart drop-off fell from 68% down to 34%, and our checkout conversion jumped by 184% in the first quarter.”
“Their Amazon SP-API and Etsy sync automated our entire multi-channel inventory. We have managed 12,000 active SKUs across Q4 peak season with zero overselling incidents.”
“JB.er built custom Shopify Functions for our tiered volume bundles. Mobile PageSpeed increased from 38 to 99, completely changing our paid acquisition unit economics.”
Cheaper Than Churned Customers
A 1-second delay in page load drops conversions by 7%. Our engineering solutions pay for themselves within the first 60 days.
Sprint Build
Fixed ScopeA high-impact 2-to-3 week engineering sprint to solve your biggest conversion or sync bottleneck.
Growth Retainer
Your dedicated senior e-commerce engineering team on tap. Continuous features, CRO testing, and SLA.
Enterprise Architecture
Custom ScaleTailored for high-volume merchants ($10M+ GMV) requiring bespoke ERP integrations and custom pipelines.
Frequently Asked Questions
Everything you need to know about our engineering standards, turnaround times, and delivery process.
Get Your Store Architecture Review For Free
Send us your Shopify, Etsy, or Amazon store. Within 24 hours, our senior technical architects will send you a video teardown revealing speed bottlenecks, cart abandonment leaks, and sync risks.