Senior SDK Engineer

About the role

We are hiring a Senior SDK Engineer to build and own Frame.js, our TypeScript SDK and web component library that merchants use to embed compliance-aware payment flows into their products. This is a craft role.

Responsibilities

• Own Frame.js, the TypeScript SDK merchants use to embed identity verification, payments, and compliance flows.
• Build web components that handle complex compliance interactions while remaining simple to integrate.
• Write developer documentation, integration guides, and the examples that make adoption frictionless.
• Manage SDK versioning, backwards compatibility strategy, and the release process that keeps it reliable.
• Build internal tooling and testing infrastructure that ensures SDK quality across merchant environments.
• Maintain feedback loops with merchants and the Frame engineering team so the SDK evolves with real usage.

Requirements

• 5+ years of software engineering experience, with significant focus on SDK or developer tooling.
• Deep TypeScript and JavaScript experience. You know the language well enough to design around it.
• Experience building and maintaining public-facing APIs or SDKs used by external developers.
• A strong instinct for developer experience. You know what makes an API feel right, and what makes it frustrating.
• Attention to detail at the documentation level.
• Good code and bad docs is still a bad SDK.
• Experience building payment, identity, or compliance SDKs is a strong plus, as is managing a public SDK through versioning, deprecation, and breaking changes.
• Familiarity with web components, custom elements, or shadow DOM, fintech or regulated infrastructure background, or experience with Go or Ruby on the backend complementing front-end SDK work, is also valued.

Qualifications

Sees the SDK as a product, not a wrapper. You sweat the details that make the difference between an API that clicks on first read and one that frustrates. You hold a high bar for developer experience and treat documentation as a first-class deliverable.

Skills

• Software Engineering
• TypeScript
• JavaScript
• Public-facing APIs or SDKs
• Developer Experience
• Web Components
• Custom Elements
• Shadow DOM
• Payment, Identity, Compliance SDKs
• Fintech or Regulated Infrastructure Background
• Go or Ruby on the Backend

Benefits

• $160,000 to $200,000 base + equity
• Unlimited PTO, with trust to manage your own time.
• Wellness budget covering dental, vision, and a free Equinox membership, plus team-led running and spin groups.
• Daily lunch and a fully stocked snack kitchen in our Los Angeles office.
• Apple hardware, Frame branded merch, regular company offsites, and a relocation package if you're not already local.

Pay

$160,000 to $200,000 base + equity

Schedule

Unlimited PTO, with trust to manage your own time.