Open to Lead Shopify & E-commerce Tech Lead roles

Hi, I'm Manthan. I build stores that scale.

Lead Shopify Plus engineer with 6+ years architecting e-commerce platforms for DTC and luxury brands across the US, Canada, UK, Australia and India, from checkout extensions and Shopify Functions to subscriptions, integrations and automation.

Manthan Deshmane
⚡ Shopify Plus
🚀 35+ stores
0Years in e-commerce
0Live stores shipped
0People led
0Countries served
About

I turn ambitious e-commerce ideas into fast, scalable Shopify Plus stores. For six years I’ve partnered with brands across five countries, building the checkout logic, subscriptions and automation that run behind the storefront. I’ve led engineering teams, shipped 35+ live stores, and I care about one thing: systems that keep growing revenue long after launch.

01

Platform Architecture

Reusable section systems and multi-store setups that ship new pages without new code.

02

Checkout & Functions

Checkout UI Extensions and Shopify Functions for upsells, protection and cart rules.

03

Integrations & Automation

Admin API, webhooks, Flow and scripts that remove manual work.

04

Team Leadership

Code reviews, mentoring, delivery planning and stakeholder alignment.

Featured Work

Brands I've built for.

Hover a screenshot to scroll through the live site.

formuland.com
FLFormuland homepageLive
3stores on one shared cart engine
Shopify Plus · 3 Stores · 2026 to Present

Formuland

U.S. retailer of European baby formula and sister brands. I own development across the US, Canada and ManuKind stores.

  • Checkout UI Extensions and Cart Validation Functions
  • Shared multi-store cart engine with tiered Gift With Purchase
  • Leading the Appstle to Shopify Subscriptions migration
  • Webhook-backed customer portal and Flow + Admin API automation
Checkout ExtensionsShopify FunctionsFlowGraphQL
Visit site ↗
aumlife.in
ALAumLife homepageLive
20+dynamic sections, no developer needed
Shopify Theme Architecture · India

AumLife

Turned high-fidelity Figma prototypes into a component-based theme with 20+ dynamic sections, giving the client full content control without a developer.

LiquidFigma to CodeOS 2.0
Visit site ↗
diaprecious.com
DPDiaPrecious homepageLive
40%faster first paint
Luxury Retail · Rolex Official Retailer

DiaPrecious

Built the Rolex Official Retailer integration under strict brand-compliance rules, and cut First Contentful Paint by 40% through asset and lazy-loading work.

Brand CompliancePerformanceCore Web Vitals
Visit site ↗
bahlko.com
BKBahlko homepageLive
0downtime during peak sales
Technical Strategy · Shopify

Bahlko

Led technical strategy and built inventory logic for complex product variants, optimizing Liquid rendering for zero downtime during peak sales.

Inventory LogicScalabilityLiquid
Visit site ↗
uk.audepart.com
ADAu Depart homepageLive
30%lift in mobile engagement
Luxury Retail · UK · Contract

Au Depart

Built the entire Shopify Plus storefront from complex Zeplin designs to strict luxury brand guidelines, driving a 30% lift in mobile engagement.

Shopify PlusZeplin to CodeMobile UX
Visit site ↗
sereno.co.in
SRSereno homepageLive
4 yrsas long-term technical partner
Long-term Partner · Since 2022

Sereno

Technical partner for 4 years: built and rebuilt the site through several redesigns, and continue to maintain it and ship new features.

Ongoing PartnershipRedesignsMaintenance
Visit site ↗
More Projects

Live sites across 5 countries.

More Shopify and WordPress builds, from footwear retailers and camping brands to clinics, biotech and non-profits.

5 countries, one remote hub.Stores shipped for brands in the USA, Canada, the UK, Australia and India.
RRRevival Rugs homepageLive
ShopifyUSA

Revival Rugs

Direct-to-consumer rug brand selling vintage-inspired and handmade rugs online.

revivalrugs.com ↗
PSPolysleep homepageLive
ShopifyCanada

Polysleep

Canadian sleep brand selling mattresses and bedding direct to consumers.

polysleep.ca ↗
RBRubino Shoes homepageLive
ShopifyCanada

Rubino Shoes

Multi-brand footwear retailer with stores across Quebec and a bilingual English/French online store.

rubinoshoes.com ↗
OCOutdoor Connection homepageLive
ShopifyAustralia

Outdoor Connection

Australian camping gear brand founded in 1984, selling tents, gazebos, furniture and coolers across many brands.

outdoorconnection.com.au ↗
DTDeco TV Frames homepageLive
ShopifyUSA

Deco TV Frames

US-made decorative frames for Samsung The Frame TVs, with separate US and Australian storefronts.

decotvframes.com ↗
INInvincible homepageLive
ShopifyIndia

Invincible

Indian fitness and combat-sports brand selling apparel plus boxing, MMA and Muay Thai gear.

invincible.in ↗
ZSZang SMP homepageLive
ShopifyUSA

Zang SMP

Scalp micropigmentation clinic in Los Angeles and Orange County, using Shopify for bookings, leads and simulations.

zangsmp.com ↗
BBBeyond Basics PT homepageLive
ShopifyUSA

Beyond Basics PT

Pelvic floor physical therapy practice in Manhattan, with an online marketplace for books and products.

beyondbasicsphysicaltherapy.com ↗
PGParagon Genomics homepageLive
WordPressUSA

Paragon Genomics

Biotech company developing next-generation sequencing (NGS) target-enrichment solutions.

paragongenomics.com ↗
TWThink Water homepageLive
WordPressAustralia

Think Water

Member-owned franchise network of local water pumping and irrigation specialists.

thinkwater.com.au ↗
NMNutramore homepageLive
WordPressIndia

Nutramore

Pune-based healthy snacks brand selling millet cookies, savouries and breakfast premixes online.

nutramore.in ↗
CFChetana Foundation homepageLive
WordPressIndia

Chetana Foundation

NGO in Chhatrapati Sambhajinagar working on education, mental wellbeing and digital wellness.

chetana.ngo ↗
And more

Private & NDA work

Some of my best work sits behind logins and NDAs. Happy to walk through it in an interview.

Get in touch →
Under the Hood

The engineering behind the storefront.

The systems customers never see, but that keep stores fast, safe and easy to run.

How every store I build fits together
StorefrontLiquid · OS 2.0 sections
CartCustom drawer · Functions
CheckoutUI Extensions · upsells
AutomationFlow · Webhooks · Admin API
RetentionKlaviyo · Subscriptions

Checkout & Cart Rules

Checkout UI Extensions for subscriptions, package protection and upsells, plus Cart Validation Functions that block invalid carts and discount-code abuse before they cost the business money.

Checkout UI ExtensionsCart Validation FunctionsUpsellsDiscount protection

Subscription Migration

Leading the move from Appstle to Shopify Subscriptions, with a Python bulk tool built to change live subscriptions safely.

$ python migrate.py --dry-run ✓ subscriptions scanned ✓ rate limits respected ✓ every change logged → ready to apply

Customer Portal Backend

Guest order lookup and claims on Google Apps Script and Shopify webhooks, plus new customer accounts that retired a paid app.

Automation & Security

Shopify Flow, Admin API and AI-powered workflows that remove manual work, plus a patched store-credit exploit with rebuilt credit caps.

Recommendation Engine

A branching product finder with live inventory checks, synced to Klaviyo, Meta Pixel and Flow.

0personalised outcomes

CI/CD & Delivery

Automated GitHub Actions pipelines that removed manual deployment errors and turned slow, risky releases into confident weekly drops.

0faster release cycles
Try it yourself

Play with a live checkout.

A mini store running the kind of logic I build on Shopify Plus: subscriptions, checkout add-ons, delivery protection, reward tiers, cart limits and discount protection. Play with it and watch checkout react.

☕
Single-Origin Coffee$18 · 250g bagSubscribe & save 15%
👟
Limited Drop Sneakers$120Max 2 per order
🎧
Wireless Earbuds$79Bestseller
Try this: subscribe to the coffee, add 3 pairs of sneakers, grab the suggested add-on, switch off delivery protection, apply WELCOME10, then try to sneak in STACK50.

Cart 0

$75 · Free shipping$150 · Gift
    Subtotal$0.00
    Subscribe & save
    Discount
    Shipping—
    Delivery protection
    Total$0.00
    
          

    Want checkout logic like this in your store?

    Let's talk →
    Experience

    6+ years, one focus: e-commerce.

    CHAPTER 012020 — 2023

    Building.

    I started in 2020 building mobile-first websites, where I learned early that speed is a feature. As lead developer on 15+ projects at a digital agency, I shipped Shopify private apps, WordPress plugins and technical SEO for clients across five countries, and found my focus: commerce, and the engineering that makes stores sell.

    0faster load times
    0projects led
    0organic growth
    CHAPTER 022024 — Today

    Leading.

    Then I moved from building stores to leading how they’re built: guiding engineering teams through 10+ enterprise launches, introducing CI/CD, and architecting Shopify Plus builds for luxury and DTC brands, including an official Rolex retailer. Today I lead development for a multi-store US e-commerce brand, shipping checkout extensions, Shopify Functions and subscription migrations, and using AI-powered automation to save 30+ hours of manual work every week.

    0live stores shipped
    0people led
    0enterprise launches
    faster first paint for a Rolex retailer
    faster release cycles with CI/CD
    higher client retention
    hours of manual work saved weekly with AI-powered automation
    Skills

    The toolkit.

    Pick a category to see what I use, and where I’ve used it.

    Shopify Plus

    Architecting stores that scale, from theme to checkout.

    Liquid & Online Store 2.0Reusable section systems that ship new pages with zero new code
    Checkout UI ExtensionsSubscriptions, package protection and upsells at checkout
    Shopify FunctionsCart validation that blocks invalid carts and discount abuse
    Shopify FlowAutomations that create orders and tag customers
    Admin GraphQL API & WebhooksCustomer portals, bulk tools and real-time integrations
    Multi-store setupsOne cart engine shared across regional and sister stores

    Frontend

    Fast, pixel-perfect interfaces from design to production.

    JavaScript (ES6+)Custom cart drawers, quizzes and interactive storefronts
    React & PreactCheckout extensions and app interfaces
    HTML5 & CSS3Mobile-first, responsive layouts that convert
    Figma to codePixel-perfect builds from Figma, Zeplin and Adobe XD
    Core Web Vitals40% faster first paint for a luxury retailer
    AccessibilityWCAG 2.1 AA audits and fixes

    Backend & Integrations

    The systems and integrations that keep stores running.

    Node.jsPrivate apps syncing inventory across warehouses
    PythonBulk tools with dry-run mode, rate limits and logging
    PHP & WordPressCustom plugins and WooCommerce storefronts
    SubscriptionsAppstle and Shopify Subscriptions migrations
    Marketing stackKlaviyo, Meta Pixel and Tapcart integrations
    CI/CD & cloudGitHub Actions pipelines, AWS and MySQL

    Leadership & Quality

    Leading people and setting the bar for quality.

    Team leadershipLed 15+ people across engineering teams
    Code reviews & standardsShared coding standards and branching conventions
    MentoringPair programming and structured feedback for juniors
    Solution architectureTurning business goals into clear technical plans
    Stakeholder managementWorking directly with marketing, design and leadership
    Technical SEOStructured data that grew organic traffic by 25%

    AI & Automation

    Using AI to ship faster and take the busywork off the team.

    AI-assisted developmentUsing AI coding assistants to build, refactor and review code faster
    AI-powered automationWorkflows that save 30+ hours of manual work every week
    Prompt engineeringDesigning prompts and workflows that give reliable, repeatable results
    AI-assisted QA & debuggingFaster root-cause analysis, testing and code review
    Contact

    Let's build something that sells.

    Hiring for a Lead Shopify or E-commerce Tech Lead role? I'd love to hear about it.