Freelance Web Analyst

About Data Detective

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

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

Your Mission as a Freelance Web Analyst

We are looking for an experienced freelance professional to take charge of the operational side of the agency. You will be the founder's right-hand person for production, managing client missions from A to Z, from the initial audit to the delivery of dashboards.

This is not a one-off assignment. We are seeking a long-term partner eager to invest in the agency's development, with true 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 follow-up meetings, reporting, training 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 strong and autonomous. The ideal profile masters the following subjects:

• Advanced proficiency in 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 concurrently
• Good communication – you can explain data to non-technical audiences

Key Technologies

• 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 & Collaboration

• Status: Freelance (micro-enterprise, portage, or company)
• Location: Full remote – no geographical constraint
• Volume: To be defined together based on your availability and workload
• Remuneration: TJM (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 an agency in construction. Joining now means having a real impact on the company's direction. 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
• Possibility to evolve with the agency as it grows

Key skills/competency

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