Founding Engineer - Backend & Data Platform at Greenline

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Job Title: Founding Engineer - Backend & Data Platform

Salary: $175,000 - $225,000 + Equity

Company Description: Greenline - Fast-growing fintech startup

Job Description:
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.

Location: San Francisco, Austin, NYC, or Remote, USA

Why this role is remarkable:

- 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.

What you will do:

- 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.

The ideal candidate:

- Proven experience building and operating event-driven data systems and complex APIs at early...