Data Engineer (Warsaw/hybrid)

A fast-growing product company that develops and promotes mobile utilities and services for iOS. Our business operates on a web-to-app subscription model and focuses on Tier-1 markets.

Currently, we are launching a new product and building an infrastructure team from scratch. We are looking for a Data Engineer who will help us design a scalable analytics system, integrating data from payment systems, advertising platforms, and product events.

Role Objective:

Build and maintain a robust architecture for collecting, integrating, and analyzing data for web-to-app subscriptions. Implement end-to-end analytics from click to payment, design ETL processes, integrate with payment service providers (PSPs) and ad platforms, and create BI dashboards with key business metrics.

Responsibilities:

• Design and implement analytics logic for web-to-app subscriptions: redirects, paywalls, deeplinks
• Integrate and process events from Stripe and Solidgate (invoice.created, paid, failed, etc.)
• Link payment data to click IDs to enable end-to-end tracking
• Collect and process data on initial payments, declines, refunds, chargebacks, grace periods, and rebills
• Develop and automate ETL processes
• Build BI dashboards and reports on key metrics (CAC, ROAS, MRR, ARR, Churn Rate, LTV, ARPU, Trial-to-Paid Conversion)
• Integrate data from multiple sources: Stripe, Solidgate, Facebook Ads, Google Ads, Adsterra, backend
• Work within Google Cloud Platform (BigQuery, Cloud Functions, Cloud Storage)

Requirements:

Must-have skills & experience:

• Strong SQL knowledge and experience with PostgreSQL (or other relational databases)
• Proven track record of building ETL processes and API/Webhook integrations
• Hands-on experience with Stripe, Solidgate, or other PSPs
• Knowledge of Google Cloud ecosystem: BigQuery, Cloud Functions, Cloud Storage
• Proficiency in Python (pandas, analytics, ETL automation)
• Experience with BI tools (Looker, Tableau, Redash)
• Understanding of subscription business models: trial, recurring, dunning process
• Background in mobile or web products (mandatory)

Nice-to-have:

• Knowledge of advertising platforms: Google Ads, Facebook Ads, Adsterra
• Experience with tracking systems (e.g., Keitaro)
• Understanding of high-load data flow architectures
• Experience with Airflow or similar tools

Work Format:

• Office in central Warsaw
• Hybrid model (office + remote)
• Relocation after probation is possible

We Offer:

• Competitive salary
• Flexible approach to schedule and tasks
• Minimal bureaucracy, high trust, and autonomy
• A professional and ambitious team where initiative and contribution are valued