Blue Onion, a YC-backed, women-led fintech startup, is quietly building the financial data infrastructure that CFOs will rely on to power the next generation of AI in finance.

Blue Onion is the data backbone for tomorrow’s AI-powered finance teams — a subledger platform that transforms messy, scattered transactions into clean, reconciled, and automation-ready data.

How We’re Different

• We’re a lean team so all of your work will have a direct and measurable impact on the business
• You’ll have the opportunity to craft elegant, efficient, and sometimes scrappy solutions to hard technical problems using the latest and greatest technologies

What Your Day Would Look Like

• Build scalable and fault-tolerant data pipelines in Google Cloud Platform using Apache Airflow
• Inspect, analyze, and transform data using SQL based tools like BigQuery and DBT
• Design, implement, and test features on our web application using Ruby on Rails and React
• Build integrations with external services

What We Look For

• You take ownership for your work and are constantly looking to learn
• Authorized to work in the US
• 6+ years of experience in Python, Ruby/Rails, Fronted Technologies, and SQL
• Experience with Apache Airflow
• Experience with devops on AWS, GCP or Azure

• Our application runs on a tech stack that is a mixture of Python and Ruby on Rails + React
• For our backend data processing, we use Apache Airflow.
• For our web application, we use Ruby on Rails, with a Typescript/React single-page-app frontend, powered by a GraphQL API