eCommerce
DTC apparel · Shopify
+184% revenue in 9 months
Digital marketing & AI consultancy
Lean marketing.
Real results.
Faster.
We are award-winning, experienced digital, social and eCommerce experts who operate without the cost, complexity or layers of a traditional agency. Whether you need a clearer strategy, stronger performance or experienced support to get a project moving, we deliver the work that will make the greatest commercial difference. The Lean Way.
17+
Years senior experience
40+
Brands scaled
4.2×
Avg. ROAS uplift
0
Bloated retainers
Brands we've worked with
Paddy Power
Paddy Power
Multiple award-winning national and international campaigns across social and paid media
LidlLidl
Revamped online and social experience across multiple seasonal campaign and brand launches.
Sky
Sky
Delivered multiple national and international campaigns, including Sky Glass and the FAI Women's National Team sponsorship.
SSESSE
Led the digital activity for SSE across B2C and B2B, from paid acquisition to .com.
Quantcast
Quantcast
EMEA wide B2B and B2C demand generation, analytics and data visualisation projects.
53 Degrees North
53 Degrees North
Social content strategy & video production across key retail moments.
Lily's ChildcareLily's Childcare
Full rebrand and end to end social media management from strategy to content
Buckley Real Estate
Buckley Real Estate
Full digital service, supported by strategic social content and lead generation
Cassidys Camden StreetCassidys Camden Street
Hospitality branding, social content and events marketing for a Dublin landmark pub.
FAIFAI
Collaborated with the FAI to produce multiple content pieces for the FAI Women's National Team.
Kerrigans
Kerrigans
Developed engaging social content that brought the Kerrigans brand, products and craft butcher expertise to life online.
Shamrock Rovers
Shamrock Rovers
Produced the Clear the Head documentary series with Shamrock Rovers, alongside matchday graphics and social content.
Templeogue UnitedTempleogue United
Head of Communications for Templeogue United, leading club communications, digital content and sponsorship activation.
Fussy Food PlatesFussy Food Plates
DTC brand launch, Shopify build and paid social scaling for a food-tech startup.
Alfa Electrical
Alfa Electrical
Social content, .com management and design consultancy work supporting a strong, consistent digital presence.
Glenwise Kitchens
Glenwise Kitchens
Brand and digital support for a bespoke kitchen maker, from social content to lead generation.
Case studies
See the work behind the results.
Explore how our expertise in paid media, content production, eCommerce and brand made a difference — the lean way.
Services
What We Do.
We improve the things that drive commercial growth — performance, efficiency, clarity and speed. Senior-led, without the agency overhead.
- 01
Paid Media
Better return on ad spend. We plan, build and optimise Meta, Google, TikTok and LinkedIn campaigns around revenue, not vanity metrics.
- 02
AI Transformation
Faster, lower-cost marketing operations. We embed practical AI — workflow automation, content systems and agent tooling — that frees your team to focus on growth.
- 03
Content & Creative
More consistent, higher-quality output. From big campaigns to quick-turn social assets, we produce editorial, video and creative that keeps pace with your calendar.
- 04
SEO & Organic
Sustainable, compounding traffic. Technical audits, content strategy, entity SEO and AI-search readiness that turn rankings into qualified pipeline.
- 05
CRM & Lifecycle
Stronger retention and customer lifetime value. Email, SMS and journey design that segment, automate and convert your existing audience into a revenue engine.
- 06
Branding & Positioning
Clearer differentiation in crowded markets. Brand strategy, identity and go-to-market positioning that makes what you do instantly understandable and memorable.
- 07
Site & Platform Migrations
Smoother moves with SEO and revenue protected. Shopify, headless, WordPress, Squarespace, Webflow — we migrate carefully and improve conversion while we're at it.
- 08
Measurement & Analytics
Confidence in every decision. GA4, server-side tracking, attribution and reporting that gives you fast, defensible insight into what is actually working.
The lean model
We're different
by design.
Over the past two decades we've watched marketing bloat. Too many layers. Too many buzzwords. Too many invoices with little to show for them.
Brands pour money into complex funnels, oversized teams and vanity metrics — while losing sight of what actually moves the needle. We offer something different.
Lean. Focused. Outcome-obsessed.
Smart, efficient, full-spectrum support — from eCommerce and performance to content, design, AI and data. No hand-holding. No inflated retainers.
Senior expertise
The person you meet is the person doing the work.
AI-native
Modern tools embedded in every workflow, not bolted on.
Outcome-priced
Aligned to results — not hours, not headcount.
Selected work
Measured in outcomes.
B2B SaaS
Series B · Global
3.2× qualified pipeline
Marketplace
Migration · Headless
42% lift in organic sessions
Retail
AI transformation
60% content ops efficiency
Case studies available on request. Recent engagements span DTC apparel, global retail, B2B SaaS, marketplaces and venture-backed startups.
Explore case studiesIn their words
Barry cut through six months of noise in a week. Clear plan, senior thinking, and results we could actually measure.
The rare consultant who ships. He rebuilt our paid media, migrated the site, and left our team stronger than he found it.
Our AI adoption went from slide-deck to shipping in eight weeks. Practical, senior, no fluff.
About
Founded by Barry McCarthy.
Seventeen-plus years leading digital marketing across start-ups, scale-ups and international brands — from eCommerce and performance to brand, content and AI.
Lean Growth Marketing is the model we always wished clients could hire: senior thinking, direct access, and the operational range of an agency, without the layers that dilute the work.
Currently taking on a small number of new engagements.