Freelance Web Analyst

Freelance Web Analyst at Data Detective

Data Detective is a full-stack data agency assisting the marketing teams of SMEs and mid-sized companies (e-commerce, SaaS) in leveraging their data. Our promise: transforming scattered data into concrete tools that enable decision-making in 15 minutes instead of 4 hours.

We operate across the entire data chain: audit and tracking setup (GTM, GA4, Server-Side), data collection and centralization (BigQuery, Supermetrics, Airbyte), marketing dashboards (Looker Studio), and strategic analysis.

The agency is in a structuring phase. Currently, the founder manages sales, production, and processes. The objective is clear: recruit a trusted operational partner to free up time for agency development.

Your Missions

We are looking for an experienced freelancer to take charge of the agency's operational side. You will be the founder's right hand for production: you will manage client missions from A to Z, from initial audit to dashboard delivery.

This is not a one-off mission. We are seeking a long-term partner who wants to invest in the development of an agency, with real autonomy on technical subjects.

Tracking & Collection

• Audit, setup, and maintenance of tagging plans (GTM, GA4).
• Server-side deployment.
• RGPD compliance (Consent Mode V2).

Data & Dashboards

• Data centralization (BigQuery, Google Sheets + Supermetrics, Airbyte).
• Creation and maintenance of marketing dashboards on Looker Studio.

Analysis

• Ad hoc and recurring analyses for retainer clients.
• Strategic recommendations based on data.

Client Relations

• Regular progress updates, reporting, training of client teams on delivered tools.

Continuous Improvement

• Contribution to structuring internal processes, documenting methods, automating repetitive tasks.

Your Skills

We are primarily looking for someone technically solid and autonomous. The ideal candidate masters the following topics:

• Advanced mastery of GTM (Web + Server-Side) and GA4
• Concrete experience in data visualization (Looker Studio, or equivalent)
• Ability to analyze marketing data (attribution, funnel, cohorts)
• Knowledge of BigQuery, SQL, and ideally Python or AppScript
• Understanding of RGPD / Compliance issues (CMP, Consent Mode)
• Autonomy, rigor, and ability to manage multiple clients simultaneously
• Good communication — you know how to explain data to non-technical people

Tracking	GTM, GA4, Server-Side (Stape/Addingwell)
CDP	Segment, Piano Analytics
Data Warehouse	BigQuery, Google Sheets + Supermetrics, Airbyte
Dashboards	Looker Studio
Analysis / ETL	Python, AppScript, SQL
Compliance	CMP, Consent Mode V2
Project Management	Notion, Slack

Benefits

• Status: Freelance (micro-enterprise, portage, or company)
• Location: Full remote — no geographical constraints
• Volume: To be defined together based on your availability and workload
• Compensation: Daily rate to be discussed based on your experience and positioning
• Start Date: As soon as possible
• Commitment: Long-term collaboration desired

Data Detective is a company under construction. Joining now means having a real impact on the direction the company takes. You will not be just another executor: you will be the first operational partner, with complete visibility on projects, clients, and strategy.

• Total autonomy on production
• Diversity of missions and client sectors
• Direct relationship with the founder, no hierarchical layers
• Opportunity to grow with the agency as it expands

Key skills/competency

• Web Analytics
• Google Tag Manager (GTM)
• Google Analytics 4 (GA4)
• Server-Side Tagging
• Data Visualization
• Looker Studio
• BigQuery
• SQL
• Marketing Data Analysis
• RGPD Compliance