Moonpay Senior Software Engineer at MoonPay building a developer platform for partners to integrate payment and crypto experiences. Own the developer-facing layer and build APIs, SDKs, and embedded components for external developers.
Responsibilities
Build the developer platform
Design and build APIs, SDKs and embedded components used by external developers
Turn MoonPay’s existing authentication, identity, payment and purchasing capabilities into reusable platform modules
Develop secure browser and mobile integration patterns across iframes, web views and native applications
Qualification
Must-have experience and skillsExternal developer productsBrowser or mobile depthJavaScript and TypeScriptAPI and SDK designDistributed systemsProduct judgementOwnershipNice-to-have experienceBuilt payment APIsExperience with secure iframes
Required
Must-have experience and skills
External developer products. You have built APIs, SDKs, embedded components or integration tooling used by third-party developers.
Browser or mobile depth. You understand how browsers and mobile applications behave beneath the framework level, including sessions, storage, cross-origin communication and embedded experiences.
JavaScript and TypeScript. You have strong language fundamentals and have built production client-side or SDK infrastructure.
API and SDK design. You understand versioning, backwards compatibility, documentation, error design and safe migrations.
Distributed systems. You build correctly when events arrive twice, late or out of order and when dependencies fail.
Product judgement. You can turn complex platform capabilities into interfaces that developers can understand and adopt.
Ownership. You have taken developer-facing software from design through launch, adoption and ongoing production support.
Nice-to-have experience
Built payment APIs, checkout SDKs, embedded financial products or payment-method integrations.
Built products similar to Stripe Elements, Stripe.js, Plaid Link or Braintree’s client SDKs.
Experience with secure iframes, web views, postMessage or cross-origin browser infrastructure.
