Founding Engineer - Backend & Data Platform at Greenline

As a Founding Engineer, you will architect the foundational data platform that unlocks mortgage lending for 16.5 million self-employed Americans. You'll build resilient ingestion pipelines for banking and tax data, design scalable microservices in Postgres, and enable ML-driven insights that transform hours of manual review into minutes of automated processing.

• Design and implement robust data ingestion and normalization pipelines for third-party financial sources like Plaid, the IRS, and accounting platforms.
• Architect performant backend systems for asset serving, authentication, and complex relational data modeling using Postgres and GraphQL.
• Productionize ML-driven signals by implementing feature extraction pipelines and integrating classification and anomaly detection models into core workflows.

• Proven experience building and operating event-driven data systems and complex APIs at early-stage startups where they wore many hats.
• Expert-level proficiency in relational database design and a deep understanding of data correctness, auditability, and long-lived data contracts.
• Practical familiarity with ML fundamentals including feature engineering and model evaluation, with the ability to consume and debug ML-driven systems effectively.

• Take 0→1 ownership of a greenfield data backbone at a nimble, high-agency startup composed of former Airtable and Opendoor engineers.
• Directly impact the lives of millions of underserved borrowers by automating complex non-QM mortgage underwriting through innovative AI-driven infrastructure.
• Receive a founding team title with an aggressive equity package and high architectural influence over the entire product lifecycle and technical roadmap.