Product Engineer, Data Exchange & API Monetization

Closr; San Francisco (CA); On-site; USD 150,000 - 190,000; Full time

Job summary

Closr is seeking a Product Engineer for Data Exchange & API Monetization in a fast-moving setting. You will own end-to-end data partnerships, making them metered and billable through the API, with autonomy reporting to the CTO/co-founder.

You will craft integrations, talk with customers to uncover needs, and steer product strategy for the data exchange while collaborating with multiple engineering teams.

Qualifications

• 5+ years as product/backend/integrations engineer with hands-on coding.
• Built usage metering or billing/entitlements in production.
• Experience with API-first or devtools startups preferred.
• Shipping developer- or customer-facing products beyond internal tools.
• Owns data pipelines, data feeds, or billing infra end-to-end.

Responsibilities

• Take signed data sources from nothing to live, metered access via the API.
• Build and run metering, billing, and entitlements behind the exchange.
• Ship integrations that connect outside data providers to the platform.
• Talk directly with customers and decide what to build from real needs.
• Own product strategy for the exchange with the founder.
• Collaborate with other engineering teams as data library touches multiple products.

Skills

5+ yrs experience

TypeScript

Next.js

Node/Express

API-first

Devtools background

Customer-facing

Product sense

Tools

REST APIs

Billing systems

Job description

Product Engineer, Data Exchange & API Monetization

Location: San Francisco, CA or Toronto, ON (on-site, 5 days a week)

Visa: Sponsorship and transfers supported (H1B, TN, OPT). Relocation help available.

About the company

Our client is a fast-growing AI data infrastructure company. Its API turns any web page into clean, LLM-ready data with a single call, and AI agents and some of the best-known AI companies build on it every day. The company reached eight-figure ARR in its first year, more than doubled it in year two, and recently closed a large Series B. Its open-source project is one of the most-starred repositories on GitHub.

The team is about 40 people across SF and Toronto. Everyone owns a real piece of the product and works without layers of process. Code shipped on Monday is usually in customers' hands by Friday.

The role

The company is building the largest data library for AI. You'll own its data exchange end to end: getting data partnerships live and making them metered and billable through the API. You'll report directly to the CTO/co-founder and have a lot of autonomy. You'll write the code and also decide what gets built.

What you'll do

• Take signed data sources from nothing to live, metered access that developers can call through the API
• Build and run the metering, billing, and entitlements behind the exchange
• Ship integrations that connect outside data providers to the platform
• Talk directly with customers, find the real need behind each request, and decide what to build
• Own product strategy for the exchange, working closely with the founder
• Work with other engineering teams, since the data library touches several products

What we're looking for

• 5+ years as a product engineer, backend engineer, or integrations engineer, and still hands-on in the code every day
• You've personally built usage metering, usage-based billing, or entitlements systems that run in production
• Experience at an API-first or devtools startup (strongly preferred)
• Hands-on experience shipping developer-facing or customer-facing products (not only internal tools)
• Experience owning production data or integration systems end to end, such as pipelines, third-party data feeds, or billing infrastructure
• A strong product sense. You've shipped products that got real traction and made hard calls along the way.
• Strong TypeScript. Next.js and Node/Express are a plus.
• Interest in AI agents and automation
• Comfortable talking with customers directlyAble to work on-site 5 days a week in SF or Toronto

Nice to have

• Background in data partnerships or API monetization