Founding Engineer - Product at Mason | San Francisco, United States | Rezi

Founding Engineer - Product at Mason

Founding Engineer - Product

Mason · San Francisco, United States

1 months ago

Founding Engineer - Product

Mason · San Francisco, United States

2 months ago
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About the Role

You'll be responsible for shipping features that customers love, taking a feature from idea to production. This role requires deep thinking about user interaction and close collaboration with customers to understand their workflows and build delightful product surfaces for AI agents. It's a hands-on, high-autonomy position where you will identify needs, talk to customers, and build solutions end-to-end.

Responsibilities

  • Ship features that customers love.
  • Take a feature from idea to production.
  • Think deeply about how users interact with the product.
  • Work closely with customers to understand their workflows.
  • Build product surfaces that make AI agents useful and delightful.
  • Identify what needs to be built and build it end to end.
  • Build production AI agents that own real developer workflows end to end.
  • Build customer-facing product surfaces in Next.js and TypeScript.
  • Build agent-based systems that run long-lived, stateful workflows.
  • Build retrieval, reasoning, and eval layers that improve continuously in production.
  • Build document ingestion and processing pipelines across PDFs, policies, drawings, and emails.
  • Build internal tools that let a very small team ship extremely fast.
  • Build features that integrate AI agents into real customer workflows with great UX.

Requirements

  • Minimum 3 years of experience in software engineering.
  • Proven ability to ship features end to end, from backend to frontend.
  • Strong full-stack engineering skills with good product intuition and taste.
  • Customer-obsessed - think about how users will actually use what you build and design accordingly.
  • High ownership, high agency - own the outcomes, not just the code.
  • Fast learner who actively adopts new tools and frameworks.

Skills

  • Full-stack engineering
  • Next.js
  • TypeScript
  • Modern React
  • AI-powered products
  • Building with AI agents
  • Startup experience
  • Fast-moving team experience

Location

  • Remote

Work Type

  • Full-time

Experience Level

  • Minimum 3 years of experience in software engineering

About the Company

  • Mason is on a mission to accelerate the development of the built world by tackling housing shortages, energy constraints, and decaying infrastructure.
  • We create AI employees that speed up the development of large projects for major REITs, institutional developers, and asset managers.
  • The company is growing rapidly, having quadrupled annualized revenue in March.
  • The founding team includes a repeat founder with a Fortune 500 exit, a former tech lead at Meta SuperIntelligence, and a development director with experience building over $2B in projects.
  • Mason combines expert services with AI agents to enable faster development, error elimination, and precise scaling.
  • The company is backed by top investors, operators, and major development firms.
  • The team works directly with entities managing billions in AUM.
  • The team is small, intense, low-ego, and enjoys working together.