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Javier SierraJS

Javier Sierra

Senior Google ADS | Analytics | Tag Manager | AI

€160/day
5 projects
Madrid, ES
15+ years

Average response time: 12 hours

Freelancer profile translated to English.
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About Javier

Google Ads Specialist (Official Google Partner) & Advanced Analytics (GA4/GTM)
Are you looking to maximize your advertising investment return with data-backed strategies and over 16 years of experience?

I hold a degree in Marketing from IAB, am a certified Google Partner, and specialize in the design, optimization, and management of large accounts and highly complex international campaigns. I have been managing campaigns since 2009 (certified since 2014), helping companies in Spain, Finland, Luxembourg, Chile, Mexico, Ecuador, and Colombia scale their businesses.

I bring an integrated approach that combines qualified traffic acquisition with technical analytics, ensuring that every euro invested is correctly tracked and optimized.

What do I include in my monthly management services?
Google Ads & Bing Ads: Creation, development, and continuous optimization of Search, Performance Max, Display, Shopping, Video, Calls, and Apps campaigns (in Spanish and English).

Google Analytics & Google Tag Manager: Advanced implementation and custom tracking configuration for both corporate websites and eCommerce.

Google Ad Grants: Specialized management and optimization for non-profit organizations.

Audit and Technical SEO: On-Page optimization and use of Search Console to improve quality score and enhance paid campaign performance.

Monthly Reports: Clear reports with key KPIs, results obtained, and next strategic actions.

Tools and Guarantees:
Google Ecosystem: Google Ads (all current certifications), GA4, GTM, Search Console, and Google Partner.

Competitive Analysis: SEMrush and advanced industry tools.

Transparency: Fully demonstrable experience through my Google Ads Administrator panel (you can check my certifications in the attached files).

Let's talk and design a tailor-made strategy for your business objectives. Let's boost your conversions together!
  • English

    Fluent

  • Spanish

    Native or bilingual

Remote only
Primarily works remotely

Experience

  • Alba Pizzería Lounge & Café en Laureles
    Increased Pizza Sales: 447 Conversions for Alba Pizzeria
    HOSPITALITY
    March 2025 - Today (1 year and 5 months)
    Medellín, Colombia
    Challenge: Generate high-quality local leads for Alba Pizzeria through Google Search.
    Action: Executed a precise 'Search' campaign with a budget of COP 26,000/day, achieving a 100% optimization score.
    Result: In 30 days (May 6 - June 4, 2026), generated 447 conversions from 16,541 impressions and 990 clicks. With a total spend of COP 319,211, achieved a highly efficient CPA of COP 720, successfully maximizing ROI for the client.
    SEM Google Analytics Google Ads Google AdWords Google Tag Manager
  • QV Marketing
    Head of Marketing
    E-COMMERCE
    March 2017 - Today (9 years and 5 months)
    Madrid, Spain
    Certified in Google AdWords and Google Analytics
    Responsible for the company's Digital Marketing Campaigns.
    Development of SEM Campaigns with Google Ads, Bing, and Facebook Ads
    Quantitative analysis and reports with Google Analytics
    Responsible for SEO strategies
    Content Supervision (web and blog)
    Market Analysis (SEMRUSH) and Brand Positioning in major search engines and Social Networks.
    Maintenance and updating of the Corporate Website. WordPress (php, MySQL, HTML5, and CSS3)
    Google Analytics: Creation of Conversions and Conversion Funnels
    Google Search Console: Management
    [email protected] Certified in Google Analytics Google Ads Google AdWords Google Tag Manager
  • Tridimagen, s.l.
    Malt logoOn Malt
    Configure Conversions in Google Ads + Google Analytics + Google Tag Manager for E-commerce
    E-COMMERCE
    December 2023 - December 2023
    Madrid, Spain
    Advanced Analytics and Conversion Tracking Implementation
    Design, configuration, and implementation of the digital measurement strategy for Tridimagen S.L.. I centralized the tracking of key events using Google Tag Manager (GTM), achieving precise integration of conversions in both Google Analytics 4 (GA4) and Google Ads. This allowed for the unification of campaign success criteria, optimization of advertising investment ROI, and total visibility of the business's conversion funnel.
    Google Tag Manager Remarketing Google adwords Google Analytics Certified in Google Analytics

Reviews

5.0

Out of 3 ratings

F

Francisco

Tridimagen, s.l.

Reviewed on 12/7/2023

It was a pleasure working with Javier, effective and communicative, he responds quickly to all inquiries with outstanding resolution. Javier always on my team.
M

Mateo

Mr Jackson LTD

Reviewed on 6/8/2023

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Education

  • Digital Marketing
    IAB Spain
    2014
    Especialización en Marketing Digital y Estrategia de Medios Pagados Formación avanzada enfocada en el diseño, optimización y gestión de ecosistemas digitales para maximizar el ROI. Durante este programa, consolidé conocimientos clave en la auditoría de cuentas publicitarias, segmentación avanzada de audiencias B2B/B2C, y en la estructuración de embudos de conversión eficientes. Desarrollé habilidades críticas para elevar el Quality Score en campañas de búsqueda y dominar la analítica de datos orientada a resultados comerciales.

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