Knot is building the platform for merchant connectivity — like "Plaid for merchant connectivity." The company connects merchants to the many applications that consumers and businesses interact with every day. Knot's flagship CardSwitcher product allows consumers to instantly update and manage their cards on file with online merchant accounts like Netflix or PayPal. Newer products include TransactionLink for retrieving receipt-level transaction data and AgenticShopping for 1-click native shopping experiences. Founded in 2021 by Thiel Fellows Rory and Kieran O'Reilly, Knot powers connected online payment experiences for hundreds of thousands of consumers. Companies like American Express, PayPal, Current, BILT, and Step embed Knot's SDK in their apps.
Knot develops an iOS SDK that powers mission-critical merchant connectivity experiences for top FinTech companies. The iOS engineering team shapes the architecture, reliability, and performance of the SDK, working on design to release, performance profiling, memory usage and CPU optimization, concurrency and runtime efficiency, public API design and documentation, test coverage (unit, UI automation, integration, performance), and mobile CI/CD workflows. The SDK supports Swift and Objective-C with deep expertise in WKWebView, Swift Concurrency, ARC, Instruments, and iOS frameworks. Engineers design stable, predictable public APIs and produce documentation that supports developers integrating the SDK. The team handles SDK initialization, session management, merchant authentication flows, webhook events, and merchant list integration.
Knot hires for multiple iOS roles:
Key skills: Swift, Swift Concurrency, WKWebView, Instruments, memory management, multithreading, ARC, CI/CD, unit and UI automation testing, SDK design, public API documentation.
Knot is redefining merchant connectivity — making it seamless for consumers to manage their payment methods across thousands of online merchants. iOS engineers build the SDK that powers connected experiences for leading FinTech companies like American Express and PayPal. If you're passionate about developer platforms, merchant connectivity, and building high-performance SDKs that serve hundreds of thousands of consumers, Knot offers a fast-paced, innovative environment with competitive compensation, early-stage equity, and a beautiful NYC office. Founded by Thiel Fellows and backed by top investors.
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