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PylonPylonPalo Alto, CA

Backend Engineer, Underwriting

Builds backend systems to automate mortgage underwriting by encoding regulatory rules into precise, AI-enhanced code. Collaborates with experts using TypeScript, NestJS, GraphQL, and custom DSLs for high-stakes lending decisions.

130k – 220k/yr
HybridBackend Engineering

About the role

Responsibilities

  • Encode natural language rules into code using DSLs, novel techniques including AI, to translate regulatory guidelines into executable logic.
  • Work side-by-side with mortgage experts to understand nuances, exceptions, and domain complexity.
  • Build systems prioritizing correctness, precision, robust test coverage, and failure mode analysis.
  • Push into uncharted territory with AI applications in mortgage underwriting.
  • Automate complex, regulated processes to make mortgages faster, cheaper, and more accessible.

Tech Stack

  • TypeScript
  • Custom DSLs for rule encoding
  • AI/ML tooling and agentic infrastructure
  • NestJS + GraphQL
  • SQL (PostgreSQL)
  • Temporal.io (workflow orchestration)

Requirements

  • Deeply curious
  • Owns features from design to development, deployment, and maintenance
  • Willing to solve the hardest problems

Compensation

Base Salary Range: $140,000/yr to $220,000/yr + Equity + Benefits

Skills

TypeScriptNestjsGraphQLPostgresTemporal.IoDslsAI/MLSQL
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