Fractional Marketer
Data-driven growth across the full funnel, from acquisition to retention.
Explore Fractional MarketerFULL-STACK MARKETER
Hands-on growth marketing, on demand — without the full-time hire.
I'm a freelance growth marketer helping founders and lean teams turn paid, organic, and lifecycle channels into a predictable pipeline. You get a senior operator who runs experiments, owns the numbers, and ships — week after week.
ROAS Lift
+124%CAC Reduction-32%
Across paid channels
Status
Booking new projects
Available
Trusted by teams at
Operators who've trusted my growth playbook
From scale-ups to enterprise teams, these are some of the companies where I've led growth, marketing, and demand generation work.
Cake Equity
LEGALFLY
Earthly
Shimoku
Userpilot
Maze
By the numbers
A decade of building, scaling, and shipping
Real outcomes from years of hands-on growth work across startups, scale-ups, and global teams.
10+
Years Experience
30+
Startups Helped
10,000+
Hours Worked
5+
Startups Launched
6+
Countries
8+
Marketing Channels
Growth
PaidPPC Search
ConversionCRO Audit
DataAnalytics
LoyaltyRetention
About me
Meet Ruben Lozano — Fractional CMO & Growth Marketer
Nothing makes me happier than figuring out how to connect startups with their product-market fit and customers based on data-driven insights. I am comfortable with goals and challenges and working across various marketing channels: PPC, Conversion Rate Optimization, Email Marketing, Web Analytics, Tag Management, Voice of Customer, Conversational Marketing, or Cold Email Prospecting.
My job? Driving performance for all paid/performance marketing channels, evaluating and scaling into new channels with a focus on driving incremental growth and acquisition while managing CAC targets.
What I Do
Services
Strategic, hands-on marketing services designed to drive measurable growth.
Performance and Growth Marketing
Fractional CMO & Growth Marketing Experience
Keepme
Performance Marketing Specialist
Remote · London, United Kingdom
B2B SaaS AI platform for multisite fitness operators. Antares, their flagship AI sales agent, automates lead response, follow-up and tour/trial bookings.
Designed and built Keepme's Google Ads paid search infrastructure from scratch in a one-month engagement.
View experience
Lyssna
Growth Marketing Manager
Remote · Melbourne, Australia
B2B SaaS user research platform helping product, UX and marketing teams run participant recruitment, surveys and usability testing.
Owned the full-funnel growth strategy across acquisition, activation, retention and expansion.
View experience
Pika Earth
Growth Marketing Specialist
Remote · New York City, United States
B2B SaaS startup providing HVAC, plumbing and electrical contractors with AI-powered tools to automate back-office workflows including rebates, permitting and in-home sales proposals.
Built the paid acquisition engine and analytics infrastructure — driving qualified leads and clear pipeline visibility.
View experience
Flanks
Chief Marketing Officer
Hybrid · Barcelona, Spain
WealthTech SaaS that helps wealth managers aggregate and report client portfolios across banks and brokers.
Strategy and execution of a WealthTech Startup.
View experience
Holded
Performance Marketing Specialist
Remote · Barcelona, Spain
All-in-one business management platform for SMBs covering accounting, invoicing, CRM and projects.
Optimise the performance of the PPC area.
View experience
Deliverea
Performance Marketing Specialist
Hybrid · Barcelona, Spain
Logistics SaaS for ecommerce that connects retailers with multiple shipping carriers from a single platform.
Execute tasks in PPC, Email Marketing, Cold Email Prospecting and Digital Analytics.
View experienceThe Bright Angle
Growth Marketing Specialist
Remote · Asheville, United States
Ecommerce studio handcrafting premium ceramic and porcelain homeware in Scotland.
Find the way to increase the conversion rate and the number of sales.
View experience
Accenture Interactive
Digital Marketing Analyst
On-site · Barcelona, Spain
Global consultancy delivering digital, marketing and analytics services to enterprise clients worldwide.
In-client working to create KPIs reports and dashboards for marketing and business teams.
View experiencePrintsome
Online Marketing Specialist
On-site · Barcelona, Spain
On-demand custom apparel printing service for businesses, agencies and creators across the UK.
Execute tasks to increase conversion rate and implementing other areas of marketing.
View experience"An investment in knowledge always pays the best interest"
Marketing Education & Continuous Learning
Reforge
Growth Series
Growth Tribe
Growth Hacking Course
IEBS Business School
Growth Hacking Master
Ironhack
Generative AI for Marketers
Le Wagon
AI for Marketers
GTM Engineer School
GTM Engineer Cohort
Trying to be a T-Shaped Growth Marketeer
Growth Marketing Areas of Expertise
My Marketing Technology Stack
Marketing Technology Stack & Tools
These are the platforms I use day to day to plan, launch, measure, and optimise growth. Each tool below shows my expertise level — from daily-driver workhorses to specialised platforms I bring in for specific stages of the funnel.
Google Tag Manager
Tag Management
ExpertiseExpert
Google Analytics
Web Analytics
ExpertiseExpert
Google Data Studio
Reporting
ExpertiseAdvanced
Google Ads
Paid Search
ExpertiseExpert
LinkedIn Ads
Paid Social
ExpertiseAdvanced
HubSpot
CRM & Automation
ExpertiseAdvanced
Outcomes, not vanity metrics
Results that moved the needle
A few outcomes from recent fractional engagements — measured against the metrics that actually fund the business.
+312%
Pipeline growth in 9 months
B2B WealthTech SaaS — rebuilt ICP, paid + outbound, lifecycle.
−47%
Blended CAC across paid channels
Logistics SaaS — reallocated budget, killed losing creatives, fixed attribution.
4.2x
LTV:CAC ratio after 6 months
All-in-one SMB platform — pricing experiments + onboarding overhaul.
There is no improvement without feedback
What Founders & CMOs Say
"I recruited and hired Ruben, and from our first interview I could feel his passion for marketing and his amazing positive personality. He grew into a well rounded, knowledgeable marketing manager with expertise in PPC, CRO, SEO, email marketing and growth hacking."
"Ruben has a clear and executive approach to reach goals previously defined. If you are looking for someone with proactivity and focus on performance he is one of the best choice."
"His depth of experience not only helped us immensely with our user acquisition, but also quickly understand our CAC and optimise our campaigns to improve the health of user acquisition."
"Ruben is a great young talent, with fantastic digital technical skills. Most importantly, he's willing to work hard and go over and beyond his responsibilities."
"Ruben is an incredibly skilled Growth Marketer. Super smart, quick to execute, and always eager to help. 10/10 recommend!"
"Ruben is a paid search expert — he established our paid search strategy from scratch and refined it into a dependable output of cost-effective leads."
"His marketing brilliance and sales ops know-how were game-changers. Anyone would be lucky to have Ruben on their team."
"Communicative, energetic, and creative, he catapulted our startup's awareness across digital platforms."
"Ruben is an important extension of our marketing team. His expertise in paid media and data analytics has been invaluable."
"Ruben brings a wealth of experience, particularly in navigating paid media within the B2B and SaaS landscape."
"Ruben is an outstanding Growth specialist. He shows how to start small, demonstrate ROI, and grow from there."
"Ruben was able to just go into things and make changes and get things done — the most helpful consultant we've worked with."
"Ruben is very knowledgeable, efficient and extremely organised. He explains technical information clearly."
"Ruben was a star — a person who solves your problems and teaches you as you go."
"Ruben helped us restructure and optimize our Google Ads campaigns, significantly increasing results and reducing costs."
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Common Questions
Coffee is on me!
Let's have a virtual coffee and talk about your startup, your goals and the actions you can do to improve your performance.
Common Questions