Open to full-time roles — 90-day notice

E-commerce website developer who builds the store and runs the Shopping, Performance Max and Meta ads that feed it

I build online stores and then advertise them. The build covers catalogue structure, product pages, a fast mobile checkout, product feeds and tracking; the advertising covers Google Shopping, Performance Max and Meta catalogue campaigns. On e-commerce accounts I have averaged 9 to 12 times return on ad spend, a figure from specific accounts and not a promise for yours.

$400K+
Monthly ad spend managed
500+
Global brands scaled
12+
Years in performance marketing
22–30x
Peak ROAS (healthcare / IVF)

What you get

Store build
a mobile-first online store with catalogue, product pages, cart and checkout.
Product structure
categories, filters, titles and attributes written for shoppers and for feeds.
Payments and delivery
payment methods, shipping rules, tax settings and order notifications.
Merchant Center feed
a cleaned feed with disapprovals fixed and rules documented.
Tracking
GA4 e-commerce events, Google Ads conversions and Meta Pixel with Conversions API.
SEO basics
product schema, titles, descriptions, sitemap and redirects from any old store.
Ad campaigns
Google Shopping, Performance Max and Meta catalogue campaigns with documented budgets.
Product report
revenue and return by product, so spend follows profit.
Handover
admin training, a recorded walkthrough and 30 days of fixes after launch.

Building a store and advertising it are one job

Most stores that struggle have two separate problems that look like one: the site makes buying harder than it should be, and the advertising sends the wrong people to it. Developers rarely see the ad account and ad managers rarely touch the store. I do both, with 12+ years in performance marketing and $400K+ in monthly ad spend managed across 500+ brands, so the store is designed with the cost of a click in mind and the campaigns are built on a catalogue I helped structure.

That joint view changes decisions. Product titles are written for the shopper and for the shopping feed. Category pages are built to catch search demand and to land ad traffic. Checkout is tested on a phone, because that is where most orders start. And conversion tracking is part of the build, not an afterthought added when the ads underperform.

The store build

I build on Shopify when a merchant wants a proven platform with its own admin, apps and payments, and as a custom Next.js and React storefront when the catalogue, pricing rules or design call for more control. I recommend by need and not habit: a store with a few hundred products and standard rules is usually better on Shopify, and I will say so.

Whichever route is chosen, the same fundamentals apply, and I work through them in order.

  • Catalogue and navigation designed around how shoppers search, with filters that work on a phone
  • Product pages with clear photography, specifications, shipping and returns information, reviews and a visible price and buy button
  • A short checkout with guest purchase, the payment methods your customers use and clear delivery and tax information
  • Speed work: optimised images, limited apps and scripts, and Core Web Vitals checked on mobile
  • Product structured data, titles, descriptions and clean URLs, so product pages can appear properly in search
  • Order and stock notifications, a returns process and admin accounts for your team

Product feeds and Google Merchant Center

Google Shopping and Performance Max run on the product feed, and a weak feed caps results however well the campaigns are managed. Audits often find missing GTINs and brands, vague titles that leave out colour or size, wrong availability or price compared with the page, rejected items nobody noticed, and variants bundled so that one poor seller hides several good ones.

I clean and structure the feed, fix disapprovals in Merchant Center, write titles and attributes in the order shoppers search, and split products into groups so budget follows profitability. Feed rules are documented, so the fix survives the next catalogue upload.

E-commerce advertising: Shopping, Performance Max and Meta catalogue

On Google I run Shopping and Performance Max with clean conversion signals, brand exclusions where they help and product-level reporting, because an average return across the whole catalogue hides the products that lose money. On Meta I build catalogue, dynamic and Advantage+ campaigns with retargeting for visitors who viewed a product or abandoned a basket, and I test creative against cost per purchase.

My results on e-commerce accounts have averaged 9 to 12 times return on ad spend, and showroom-visit campaigns for home and building retail brands have reached 30 to 40 times. They come from specific accounts and sectors, with their margins and repeat-purchase patterns, and they are not a forecast for your store. I plan budgets from your margin, because the return you need to break even is different for every shop.

Tracking that the ads can trust

Both platforms optimise on the purchases you report, so broken tracking wastes spend invisibly. I set up Google Tag Manager, GA4 e-commerce events, Google Ads conversion tracking with enhanced conversions, and the Meta Pixel with the Conversions API and deduplication, then compare the totals against real orders in your platform. A common finding is revenue counted twice, or refunds never subtracted.

I also arrange consent handling where regulations such as GDPR or the UK rules require it, and server-side tracking where browser blocking loses a large share of purchases. I explain the trade-offs and I am not giving legal advice, so check obligations with your own adviser.

Working with me

I work remotely from India with clients in many time zones, and the store and ad accounts remain in your name. A typical project is a fixed-scope store build with a staging link at every stage, followed by an optional monthly arrangement for advertising and conversion testing. If you already have a store, I can start with an audit of the site, feed, tracking and accounts, which is yours to keep.

Shopping advertising depends on product margin, pricing against competitors, delivery promises and reviews, all of which sit on your side. I flag what I see, such as a price well above the market or a slow delivery window, because no campaign setting fixes those.

How the work runs

  1. 01

    Business and catalogue review

    Margins, products, customers, competitors, shipping and your current platform and accounts, so the plan starts from real numbers.

  2. 02

    Platform and structure decision

    Shopify or a custom storefront, with the catalogue, navigation and checkout laid out and agreed in writing.

  3. 03

    Design and build

    Mobile-first templates, product and category pages, checkout, payments and notifications, reviewed on a staging link.

  4. 04

    Feed and tracking set-up

    Merchant Center feed, GA4 e-commerce events, Google Ads and Meta conversion tracking, tested against test orders.

  5. 05

    Launch

    Redirects from any old store, sitemap submission, a payment and delivery test and a watch on the first orders.

  6. 06

    Advertising launch

    Shopping, Performance Max and Meta catalogue campaigns started with budgets set from your margin.

  7. 07

    Optimise

    Product-level reviews, feed improvements, creative tests and conversion-rate changes, reported monthly.

Tools and proof

Tools
Shopify, Next.js, React, Google Merchant Center, Google Ads, Meta Ads Manager, Google Analytics 4, Google Tag Manager
E-commerce return
9-12x average ROAS on e-commerce accounts, from Shopping, Performance Max and Meta catalogue campaigns.
Showroom visits
30-40x ROAS on showroom-visit campaigns for home and building retail brands.
Ad spend managed
$400K+ a month across 500+ brands.
Certification
Google Ads Partner certified, including Shopping certification.

Questions about e-commerce website development and e-commerce advertising

Shopify suits most stores with standard products, payments and shipping, and it saves build time. A custom storefront makes sense for unusual pricing, complex catalogues or a design that a theme cannot deliver. I recommend by your needs and say what each option costs in effort and flexibility.

Yes. Building and advertising are one workflow for me. I run Google Shopping, Performance Max and Meta catalogue campaigns, and I can do the ads alone if you already have a store or an agency builds the site.

I have averaged 9 to 12 times on some e-commerce accounts, but your result depends on margin, price, competition, reviews and delivery. I plan from the break-even return your margin requires, and I do not promise a figure.

Common causes are price or availability that differs from the page, missing GTINs or brands, policy-sensitive wording and broken landing pages. I check Merchant Center diagnostics, fix the feed rules and re-submit, so the correction repeats on every upload.

Yes. I map products, customers and orders where the platform allows, keep or redirect every URL that earns traffic, test checkout and compare search traffic before and after the move.

I connect the payment providers and tax settings available for your country, using their hosted or certified components, and I never handle raw card data. Tax and invoicing rules vary by country, so confirm the details with your accountant.

Yes. The store, Merchant Center, ad accounts, analytics and domain stay in your name. I work as an added user and hand over documentation at the end.

E-commerce website developer by country and city

Need e-commerce website development and e-commerce advertising?

Tell me the goal and the market; you get a plain answer and a fixed quote, usually within one working day.

Fastest reply on WhatsApp — usually within a couple of hours.

Scan to chat

Open WhatsApp
with this page

CallEmail
Book a call
E-commerce Website Developer & Ads Expert | Sunny Guha