Backend Engineer

About the Position

6,000+ Customers. 300+ Integrations. Your Code Moves the Data.

At Windsor.ai, we connect data from 300+ sources (Facebook Ads, Google Ads, GA4, HubSpot, Salesforce, TikTok) to 30+ destinations (Looker Studio, BigQuery, Snowflake, and LLMs like ChatGPT and Claude). We're a lean, highly technical remote team serving 6,000+ customers, and we're looking for a Backend Engineer to help scale the platform behind it.

Responsibilities

• Own API integrations end to end: rate limits, pagination, custom authentication, and inconsistent error handling across hundreds of sources.
• Ship production-grade code: clean, tested Python with pytest coverage and code review as routine.
• Keep pipelines fast and reliable: concurrency, caching, and smart data modeling as volume grows.
• Work async with a small, senior team: engineers, product, and support. Basic SQL is expected of everyone.

Requirements

• 4+ years of professional programming experience with strong production-grade Python
• Solid grasp of OOP, concurrency (threads/async), and data structures
• Comfortable in Linux development and production environments
• Experience integrating third-party APIs and dealing with their quirks
• Independent, async, and comfortable in a fully remote, contractor-style engagement

Nice to Have

• ETL/ELT or data integration experience
• Marketing/ad-tech APIs
• PostgreSQL and Redis in production
• Docker and GitLab CI/CD

We Offer

• Competitive Pay / Contractor role
• Fully remote
• Real impact: your code runs in production for 6,000+ customers

About the Company

Windsor.ai is a global team of data engineers and analysts who strive to make data integration effortless and insights easy to extract to everyone. We help businesses of all sizes connect their marketing and sales data, automate reporting, and measure what drives the greatest impact.

Founded in 2017, we have 30 coworkers and are located in multiple locations including Bratislava, Slovakia; Baar, Switzerland; Budapest, Hungary; and more.

Remote status: Fully Remote

Seniority Level: Mid Senior Level

LinkedIn Company name: Windsor AI