Founding Engineer (Platform)

polymr; San Francisco (CA); On-site; USD 140,000 - 210,000; Full time

Job summary

Polymr is building the AI-native procurement platform for factories that run the physical economy. We read vendor quotes, POs, invoices, and drawings to reconcile them and drive workflows with human approvals where it matters. This is live production software, not a demo.

As an early-stage engineer (3–6), you’ll own the multi-tenant core—workflows, permissions, data layer, and integrations—while collaborating on deployments and reliability for production customers, on-site in San Francisco.

Qualifications

• Early-stage engineer role with significant impact across product features.
• No legacy codebase; you’ll help build the product from scratch.
• Collaborate with ops managers and purchasing heads to ship features.

Responsibilities

• Develop core multi-tenant workflows, permissions, and business rules for the procurement platform.
• Build the data layer, integrations, deployments, and reliability for production customers.
• Engage with customers on the factory floor to iterate features based on real usage.

Job description

tl;dr: We’re building the AI-native procurement for the factories that run the physical economy but and still run their purchasing on spreadsheets, email attachments, and WhatsApp forwards. Our system reads the documents (vendor quotes, POs, invoices, drawings), reconciles them against each other, and runs the workflow with humans approving the calls that matter.

What you’ll own: The multi-tenant core: workflows, permissions, and business rules. The data layer, integrations, deploys, and reliability for customers who run their business on us.

• Live, not a demo: our customers run real daily procurement through Polymr. The documents are messy, the edge cases are real, and the feedback loop is measured in days.

• Founder domain-proof: engineers and researchers from Amazon, Microsoft, Goldman Sachs and ServiceNow (Berkeley, Duke, Columbia, Harvey Mudd, Georgia Tech) working alongside supply-chain operators who ran procurement and IT at P&G, Tesla, Otis, and DaVita.

• Early enough to matter: you’d be engineers # 3 – 6. There is no legacy codebase and no committee. What you build is the product.

How we work

Roughly 80% building, 20% embedded with customers , every engineer here talks to the ops managers and purchasing heads who use what we ship, and sometimes sits on the factory floor watching them use it. We use AI coding tools (Claude Code, Cursor) as a daily multiplier and expect you to. [SF/in-person].

Our AI policy: draft your application yourself, polish it however you like; use AI freely on the build round, the way you would on the job; live rounds are just you. PS: we read every application ourselves. Non-AI-written answers stand out!