Marketing Data Analyst (Ecommerce)

TL;DR

Marketing Data Analyst (Ecommerce): Turning data into insights to drive smarter decisions, improve channel performance, and optimize marketing investments with an accent on optimizing marketing budgets and channel mix to maximize efficiency. Focus on conducting data studies to uncover insights and writing ETL pipelines.

Location: Remote (any location) or hybrid (Lisbon office)

Company

Joom is a global cross-border marketplace where millions can find anything they want at fair prices.

What you will do

• Evaluate the effectiveness of new advertising channels.
• Set up and improve monitoring of statistical anomalies in metrics.
• Improve long‑term payback prediction models.
• Generate hypotheses to improve acquisition/product feeds/ad creatives/channel split/targets, etc.
• Conduct data studies to uncover insights.
• Write ETL pipelines (data marts, alerts, and predictions).

Requirements

• Experience in data analysis, experience in marketing analytics.
• Understanding of marketing KPIs, attribution models, and the problems ad platforms solve.
• Knowledge of mathematical statistics and experience applying it.
• Ability to write complex SQL queries.
• Data analysis skills in Python.
• Good English verbal and written communication skills (B2+).

Nice to have

• Experience running A/B, geo, and other types of experiments.
• Experience in econometrics.

Culture & Benefits

• Fully remote or hybrid format (Lisbon office).
• Contract-based collaboration (full-time).
• Transparent growth framework: we define growth expectations together and set goals that align with them.
• Access to advanced AI tools (Cursor, ChatGPT, Gemini, Claude).
• Strong analyst community & cross-team knowledge sharing.
• Open culture with minimal bureaucracy.