Principal Software Engineer, Platform

The role

The Principal Engineer will own the evolution of the architecture and platform to support both agents and people. This role involves working across infrastructure, shared services, and product code to scale the organization's output.

What you will do

• Own the architecture of the codebase and set patterns, module boundaries, and domain abstractions.
• Design the monorepo for agents by structuring packages, ownership, build graph, and conventions.
• Build the platform substrate including shared services, infrastructure, and paved paths.
• Own the agentic SDLC and define how work moves from ticket to production.
• Scale verification with volume through AI-assisted code review, test generation, and CI gates.
• Stand up agents to pick up tickets, triage flaky tests, run upgrades, and draft fixes.

Required qualifications

• Owned the architecture of a large, multi-team codebase.
• Run monorepo tooling (Nx, Turborepo, Bazel, or similar).
• Strong platform and infrastructure depth in cloud infrastructure, infrastructure as code, CI/CD, observability, and services.
• Ability to work across the stack as a product engineer from data model to UI.
• Work agent-first with experience using AI coding agents.
• Knowledge of the agentic stack including context engineering, agent instructions and skills, MCP, sandboxed execution, and evaluating coding agent output.
• Operate with earned authority through judgment, working code, and clear writing.
• 15+ years of software engineering experience, including setting technical direction across multiple teams.

Nice to have

• NYC-based candidates
• Candidates open to relocation

Benefits

• Competitive salary
• Meaningful equity
• 100% company-paid base medical, dental, and vision coverage
• Healthcare FSA
• 401(k) savings plan
• Unlimited PTO
• Paid family leave
• Home office & equipment stipend
• Daily in-office lunch and dinner provided
• Commuter benefits (pre-tax transit and parking)

About the company

PermitFlow is an applied AI company serving the nation's builders to help construction companies navigate permitting, licensing, inspections, and project closeouts. The company has raised over $90M and is headquartered in New York City.