Day Marketing

About us · Based in Derby

Ecommerce people,
not an agency

We're Seb and Elena. We run Day Marketing, and shops of our own, so new ideas get tested on our own money first. You work with the people doing the work.

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Sebastien Day sitting on a stone wall with Chai, a German Shepherd Ecommerce since 2004
Seb & Elena Founders, Day Marketing
Revenue generated
£120m+
Years in ecommerce
20+
Turnover grown as CTO
£31m
Running Google Ads since
2004

Our story

Hi, I'm Seb

I spent 16 years as CTO at SGS Engineering, a Derby tool and equipment supplier, helping grow the business to £31 million turnover. I built the Magento site, implemented the ERP and warehouse systems, ran Google Ads from 2004, and bought the power tools.

Now I lead Day Marketing from Derby. We build and run online shops the way I ran my own: the feed, the prices, the ads and the site all pulling in the same direction. We work with merchants across the UK, and if you're in Derby, Nottingham or the East Midlands we're happy to come and see you.

  1. Google Ads

    Running campaigns since 2004.

  2. CTO, SGS Engineering

    16 years at the Derby tool supplier, helping grow turnover to £31m.

  3. The systems

    Built the Magento store, ERP and warehouse systems, and bought the power tools.

  4. Day Marketing

    Based in Derby, building and running shops for DIY, tools and retail.

The team

A small team, no account managers. You'll talk to the people doing the work.

  • Sebastien Day

    Founder

    Sebastien Day

    16 years as CTO at SGS Engineering, taking turnover to £31m. Google Ads since 2004. Builds the stores and runs the ads.

  • Elena Zidar

    Director

    Elena Zidar

    Co-founder. Runs Zidar Kid, our own shop for classic toys.

  • Natalie Miller

    Content & SEO

    Natalie Miller

    Writes the category pages, buying guides and product copy that bring in organic traffic.

  • Sebot AI

    AI Assistant

    Sebot AI

    Our in-house AI. Drafts copy, checks feeds and crunches the data, and never asks for a day off.

Tech we work with

What runs behind your shop, and what you get from it.

  • Shopify

    Themes built for your catalogue, with the calculators, unit prices and stock messages your customers need before they buy.

  • Google Ads

    Shopping, Search and Performance Max, with products sorted by performance every day by our own apps.

  • Cloudflare

    Hosting for our apps, data and websites, so pages load fast wherever your customers are.

  • Astro

    Fast websites, including this one, plus a changelog where you can see everything we have shipped for you.

  • Zoho Inventory

    Sales orders, supplier POs and margins worked out automatically, and pulled into your reports.

  • Reporting

    Shopify, Google Ads, GA4 and Zoho in one place, updated every four hours, with dashboards that refresh hourly.

  • SEO tools

    Keyword research, rank tracking and site audits, with Search Console alongside, so you see rankings move every month.

  • AI

    Drafts of buying guides, FAQs and image alt text at catalogue scale, checked by a person before they go live.

  • Integrations

    Small connections between the tools you already use, like delivery routes updating Shopify orders.

Ready to grow?

Think we can help?

We'll review your store, feed and ads before we talk, so the first call is useful. No obligation.

Get a free store and ads review