Freelancer profile translated to English.
Back to original languageAbout William
Over my 500+ consultations spanning the last 9 years, I have:
📈Managed large budgets:Piloted accounts spending up to €150,000/month.
🎯Outperformed agencies:Multiplied conversion rates by 4 on campaigns historically managed by third parties.
💎Optimized costs (Quality Score > 8/10):All my accounts maintain an excellent quality score, allowing me to outperform the competition and lower your cost per click.
🔄Maximized conversions (CRO):Analysis via Google Analytics and Hotjar to see how to better convert your clicks into customers.
🤝Loyalty & Long-term:I support companies' Google Ads strategy over several years. This is also why I have few recent reviews on Malt: my schedule is generally full with long-term loyal clients.
The advantage of a global business vision:
In addition to my SEA expertise, I created Poland's first menstrual lingerie brand from scratch, leading it to the title of "Brand of the Year 2022" (Marka Kobiet 2022). I know exactly what it means to invest one's own money and seek profitability at all costs. My entrepreneurial experience combined with the 100% positive reviews on my Malt profile guarantee a business-oriented approach, not just a technical one.
Feel free to contact me: I offer afree auditof your current campaigns to analyze your growth potential!
French
Native or bilingual
English
Native or bilingual
Can work on-site
Lille (up to 50km), Nantes (up to 10km), Paris (up to 10km), Marseille (up to 10km), Lyon (up to 10km)
Experience
- Sis UnderwearCEOE-COMMERCEAugust 2020 - February 2023 (2 years and 7 months)Cracovie, Poland
- Created and developed the menstrual lingerie market, to the point that we were elected "Brand of the Year 2022" in Poland.
- Managed SEA and SMA advertising campaigns.
- Developed the menstrual panty collection.
- Expanded the B2B and B2C offering.
- Conversion StudioSEA Campaign ManagerCONSULTING AND AUDITSFebruary 2019 - Today (7 years and 5 months)Lille, FranceManagement of digital marketing campaigns, specializing in SEA (Google Ads, Microsoft Ads, etc.).
- HCLSenior Agent for Google Shopping Product Classification AnalysisE-COMMERCEJune 2018 - September 2018 (3 months)Cracovie, PolandAnalysis and classification of Google Shopping products during a project in collaboration with Google, aiming to improve the relevance of results for user searches.
Reviews
D
Delphine
Head of Marketing - Réassurez-moi
Reviewed on 7/3/2026
William supported us for over 3 years in managing our Google Ads and Microsoft Ads campaigns. He is a reliable, involved freelancer, and always available when we needed him.
I greatly appreciated our collaboration. We started from scratch to build a high-performing Paid strategy, and William guided us with seriousness, pedagogy, and efficiency throughout this journey.
I recommend him without hesitation to any company looking for a competent and trustworthy SEA expert.
Thank you again, William, for your support over these three years!
Victor
Victor De Martrin SRL
Reviewed on 1/16/2025
I am starting a second project with William; he is as spontaneous and passionate about his work as ever. In addition to being proactive on Google Ads, he also gave me advice that increased my site's conversion rate by 30%. Always giving his all, he is a real added value! Thank you again for your help.
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