Available for Projects

Your Shopify store has problems. I fix them permanently.

Custom Shopify development, B2B wholesale infrastructure, and deep technical problem-solving for brands that have outgrown quick fixes. I find the root cause, not the band-aid.

Tell Me What's Broken See Problems I Solve

Sound familiar?

Your apps are fighting each other and nobody can figure out why your site is slow.

You're paying $2,000+/mo for Shopify Plus just for basic B2B features.

Your mobile conversion rate tanked and you don't know when or why.

The last developer "fixed" something and now three other things are broken.

Your theme migration went sideways. You lost customizations you spent months building.

Google is penalizing your store for schema conflicts you didn't even know existed.

What We Solve

Technical challenges that keep merchants up at night

These aren't hypotheticals. These are real problems I've diagnosed and resolved for real brands with real revenue on the line.

App Conflict Resolution

Your apps installed fine individually. Together, they're a disaster.

Conflicting scripts, load-order fights, broken checkout flows. I isolate which apps are arguing, trace it to the actual source, and resolve it without disabling tools your business depends on.

Liquid DevTools Performance Profiling

B2B Wholesale Infrastructure

Shopify Plus costs $2,000+/mo. You don't need it.

Gated storefronts, net payment terms, tiered pricing, company account workflows. I build enterprise-grade wholesale infrastructure on standard Shopify so you keep the margin.

Shopify APIs B2B Flows Custom Checkout

Performance & Mobile Optimization

Every second of load time costs you 7% in conversions.

Core Web Vitals diagnostics, script audits, render-blocking elimination, mobile-specific conversion debugging. I find what is actually hurting your numbers, not what looks suspicious.

Core Web Vitals LCP CLS Mobile

Security & Checkout Protection

There might be an exploit in your checkout flow right now.

Checkout vulnerability audits, script injection risks, third-party exposure. I review the full trust chain in your store and close the gaps before they become incidents.

Checkout Extensions CSP Audit

Theme Migration & Upgrades

Updating your theme shouldn't mean losing 6 months of work.

Methodical theme migrations that map every customization before a single line moves. Zero lost functionality. I document what exists, what transfers, and what needs rebuilding.

Shopify CLI Liquid Version Control

Analytics & Tracking Architecture

Your conversion data is wrong, and you're making decisions based on it.

Tracking audits, schema conflict resolution, custom event architecture. I rebuild your data layer so your reports reflect what is actually happening in the store.

Web Pixels GTM Schema

How I Work

Diagnose Before Prescribing

I spend the first part of every engagement understanding the actual problem, not the assumed problem. Most technical issues have a different root cause than the symptom suggests.

Document Everything

You get a clear record of what was found, what was done, and why. No mystery work. No black-box fixes that break six months later when you touch the wrong file.

Ship in Days, Not Weeks

Most problems I work on are resolved within a day or two of diagnosis. Scoped engagements move fast because I've already solved most of these before.

Proven Results

Numbers that actually happened

Real metrics from real projects. No vanity stats.

90%

Bundle Size Reduction

Migrated cart recommendations from React to vanilla JS. Load overhead dropped 90%. Checkout speed improved immediately.

17→3

Scripts Eliminated

Traced iOS Safari checkout failures to a Klaviyo script conflict. Consolidated 17 redundant scripts to 3. Issue resolved, not worked around.

$24K+

Annual Platform Savings

Built Plus-level B2B features on standard Shopify. Net 30/60/90 terms, gated wholesale, company accounts. No Plus upgrade required.

Customizations Lost

Full theme migration with complete documentation of every existing customization before anything moved. Everything transferred. Nothing rebuilt from scratch.

Featured Engagement

7-Figure Skincare Brand: Full E-Commerce Overhaul

Long-term technical partnership with a nationally distributed skincare brand doing significant DTC and wholesale volume. The engagement covered the full stack: storefront, backend infrastructure, integrations, and ongoing stability.

The challenge was a business that had outgrown its original Shopify setup. The store was running two separate customer types on one storefront, managing complex payment terms manually, and held together by too many apps with no clear owner.

The Challenge

B2B and DTC operating as a dual storefront on standard Shopify, without Plus.
Net 30/60/90 payment terms for wholesale buyers, automated and enforced in the checkout flow.
10+ apps integrated and stabilized into a coherent, non-conflicting stack.
AWS Lambda serverless webhooks for real-time order and inventory sync across systems.

Also Shipped

Built Plus-level B2B features on standard Shopify. Saved $2,000/mo in platform cost, indefinitely.

Apps and customizations slowing the store, rebuilt leaner. Nothing broke.

Mobile conversion problems traced to the real cause. Fixed once, stayed fixed.

Theme migrations and version updates that preserve every differentiating feature.

Wholesale infrastructure most agencies say requires Plus. Built on standard Shopify, automated end-to-end.

Subscription and one-time purchase flows coexisting cleanly. Customers never see the seams.

Products

Software I've built and shipped

Coming to Shopify App Store

TestLift

A/B testing for Shopify stores. Test headlines, buttons, images, and layouts without touching code. Track conversions and revenue impact with statistically significant results.

Visual editor for non-technical users
Revenue attribution and conversion tracking
Statistical significance calculations
Sub-30ms performance (industry avg: 200–500ms)

Learn more

Live

CueCog

Language learning powered by phonetic memory bridges. Learn vocabulary faster by connecting new words to sounds you already know. Built with spaced repetition and recall science.

13,000+ data points powering recommendations
3,389 validated phonetic bridges
Spaced repetition algorithm
Works offline

Try CueCog

AI Enablement

AI-Augmented Development workflows that ship

Most teams know AI can accelerate their output. Few have the architecture to make it reliable. I design, implement, and maintain production-grade AI development workflows.

Strategy

Workflow Audit & Architecture

Assess your current development workflow, identify where AI can reduce friction without adding fragility, and design an agent architecture with defined roles, structured handoffs, and safety guardrails.

Implementation

Environment Setup & Configuration

Stand up the tooling, configure the integrations, and validate the workflow end-to-end before handing it to your team. No half-finished scaffolds.

Enablement

Team Training & Handoff

Walk your team through the workflow with real examples from your own codebase. They leave knowing how to use it, maintain it, and when to override it.

Retainer

Ongoing AI Ops Support

AI tooling evolves quickly. I stay current and keep your workflow current, with periodic reviews and updates so you're not maintaining something that was state-of-the-art six months ago.

Ready to accelerate your development workflow? Book a Consultation

Baruch's work ethic is exceptional. He approaches every challenge with calm, methodical precision and doesn't stop until the problem is genuinely solved. In an industry full of quick fixes, working with someone who actually cares about getting it right is rare.

Karen M., President of Dionis Goat Milk Skincare. LinkedIn Recommendation, public and verified.

About

The person behind the code

I started in software through quality assurance, which means I learned the hard way that the difference between working software and reliable software is almost entirely about what you check before you ship. That background shapes how I approach every engagement.

I spent years breaking things deliberately before I started building them. That changes what you notice in a codebase.

I work with Shopify merchants who have real complexity: multiple storefronts, wholesale operations, deep integrations, and performance requirements that generic developers can't meet. My practice is intentionally narrow because depth is more valuable than breadth in this work.

AI-augmented development is part of how I work, not a product I sell separately. It means faster diagnostics, better documentation, and more time on the problems that actually require judgment.

Specializations

App conflict resolution
B2B wholesale infrastructure
Performance optimization
Theme migration
Checkout architecture
Analytics and tracking

Industries

Beauty and skincare
Consumer goods
Wholesale distribution
Direct-to-consumer

Working in Liquid, TypeScript, Remix, and serverless AWS on most projects.

Your store is leaving money on the table. Let's fix that.

Start with a free initial consultation. I'll tell you what I see and what I'd do about it. No obligation, no pitch.

Free initial consultation.

help@baruchhavia.dev LinkedIn GitHub