Senior Python Engineer (Integration / Infrastructure)
Summary
Senior Python engineer builds and maintains integration and infrastructure systems for a US media company’s email newsletter platform, using Python, PostgreSQL, and Playwright to ensure reliability for AI-driven workflows.
About the project
US-founded media company operating email newsletters at scale – millions of subscribers across finance, health, and business verticals. Small engineering team, flat structure, direct ownership, fast iteration. No layers of approval, no large org to navigate.
You'll own the integration and infrastructure layer alongside a counterpart engineer who handles the AI and automation side. The AI systems depend on what you build staying reliable.
What you'll work on
Custom CRMs and operational tools tailored to internal workflows
Browser automation pipelines with Playwright for interacting with and validating UI workflows
Distributed automation infrastructure: proxy management, session handling, request routing
PostgreSQL data models and pipelines that AI systems and operational teams depend on
Integrations with third-party APIs and platforms – including ones with inconsistent or undocumented APIs
Requirements
6+ years of backend development
4+ years of production Python
Strong PostgreSQL: schema design, indexing, query optimization – not just ORM usage
Hands-on Playwright or equivalent (Selenium, Puppeteer) for real browser automation
Experience with proxy infrastructure: rotation, health checking, geographic routing
Tech stack
Python · FastAPI · PostgreSQL · Playwright · Docker · proxy infrastructure · REST APIs and webhooks · third-party platform integrations
Conditions
B2B contract, full-time
Warsaw office (onsite preferred, remote considered)
Direct collaboration with technical PM and small senior team
Fast-moving environment: ambiguity, shifting priorities, growing scope