We are seeking a Senior Fullstack Python + TypeScript Engineer for a US-based SaaS company in marketing analytics.

Please note that the working hours for this position are until 11 PM Kyiv time.

About the Client
The client is an American SaaS company in marketing analytics. Its platform helps e-commerce brands understand which ad spend truly drives revenue. It collects tracking data, combines it with data from major ad platforms, and uses ML modeling to turn it into reporting.
The company’s customers spend millions per month on advertising, so data volumes are large and business decisions depend on data accuracy.

About the Project

There are several projects in progress

Conversion API (main project): reprocessing tracking signals and delivering them to ad-platform APIs in real time. Each platform’s API works differently and has its own quirks, so integrations require careful work. Stack: Python streaming, Google Pub/Sub, Shopify JS tracking.
Mobile attribution SDK (greenfield): a new SDK for JavaScript and iOS.
Analytics data pipelines: pipelines built as part of the SaaS product, not internal BI.
Full-stack product development: application features and integrations.

Requirements

Senior or Staff level, 7+ years of commercial experience in software engineering
5+ years of commercial experience with Python in production
Strong TypeScript (React) skills for building application features on the frontend
Strong SQL and deep understanding of databases
Full-stack experience: delivering product features and integrations end to end, across backend and frontend
Experience with GCP and BigQuery
Track record of building customer-facing products, not just internal tools or dashboards
Ability to design engineering abstractions and discuss architectural decisions with the team, explaining trade-offs
Fluent English (C1) for daily communication with the US team: syncs, technical discussions and written communication

Nice-to-have

Experience with e-commerce and tracking analytics
Experience with Google Pub/Sub and Airflow

Responsibilities

Work as a full-stack engineer on product features and integrations across frontend and backend
Develop application features as part of full-stack product development
Build integrations within the SaaS platform
Contribute to architecture discussions and engineering abstractions