Backend Engineer – Mortgage Underwriting & AI Platform

Pylon; San Francisco (CA); On-site; USD 140,000 - 220,000; Full time

Benefits offered by this job

Equity

Benefits

Job summary

Pylon, a Palo Alto-based fintech company, is hiring Back End Engineers for our underwriting team. You will encode mortgage rules into software, collaborating with mortgage experts to translate guidelines into precise logic and robust, scalable systems.

Join a fast-moving team applying AI to mortgage origination, using modern stacks like TypeScript, NestJS, GraphQL, and PostgreSQL. On-site in Palo Alto, CA with strong equity and benefits.

Qualifications

• Experience encoding mortgage rules into software with DSLs.
• Ability to work with domain experts to translate guidelines into logic.
• Strong emphasis on test coverage, correctness, and scalable systems.

Responsibilities

• Encode natural language mortgage rules into code using DSLs.
• Collaborate with mortgage experts to understand rules and exceptions.
• Build precise, robust systems with thorough testing and clear failure modes.
• Apply AI techniques to enhance underwriting processes.
• Automate regulated, high-stakes workflows to speed decisions.

Skills

TypeScript

Rule encoding

AI/ML tooling

NestJS

GraphQL

SQL PostgreSQL

Temporal.io

Tools

Custom DSLs

NestJS

GraphQL

Job description

Pylon, a Palo Alto-based fintech company, is hiring Back End Engineers for our underwriting team. You will encode mortgage rules into software, collaborating with mortgage experts to translate guidelines into precise logic and robust, scalable systems.

Join a fast-moving team applying AI to mortgage origination, using modern stacks like TypeScript, NestJS, GraphQL, and PostgreSQL. On-site in Palo Alto, CA with strong equity and benefits.