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Knot

Senior / Staff Product Engineer

New York, NY

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Seniority
Lead / management
Country
US
Work mode
On-site / unstated
First seen by hirly
1 Sept 2026

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the posting

About Knot

Knot’s mission is to empower consumers and businesses alike with connected merchant and banking experiences. Knot is like “Plaid for merchant connectivity.” We are building the platform connecting merchants to the many applications that consumers and businesses interact with everyday. Our flagship CardSwitcher product allows consumers to instantly update & manage their cards on file with online merchant accounts (e.g. Netflix or PayPal), while newer products like TransactionLink support the retrieval of item-level transaction data. We are building many new products on top of our novel merchant connectivity platform and we hope you choose to come build them with us!

Founded in 2021, Knot was founded by two brothers and Thiel Fellows - Rory and Kieran O’Reilly - and today powers connected online payment experiences for hundreds of thousands of consumers. Companies like American Express, PayPal, Current, BILT, Step, and more choose to embed Knot’s SDK in their apps to power best-in-class experiences for their customers.

Knot is proudly backed by a select group of investors, including Nava Ventures, 8VC, American Express, Plaid, and co-founders & CEOs of prominent companies like Twitter, Warby Parker, Allbirds, Casper, Intercom, Deel, Italic, DraftKings, and many more.

Working at Knot

We’re a world-class team hailing from all over the globe with the vast majority of the company in engineering roles. We are looking to further solidify our presence in NYC to be at the heart of the financial services ecosystem.

Our team is relentlessly focused on building for our customers and every member of the financial services ecosystem. We take our work seriously and have fun while doing it. Both are equally important.

What you’ll do

Work alongside a team to build, experiment with, and debug user-facing features across all of Knot's products (CardSwitcher, TransactionLink, etc.)

Build brand new products alongside existing features to drive further value for end users.

Develop user interfaces with React/TypeScript on the frontend and a variety of technologies at the API layer.

Foster a culture of deep care for industry-leading user experience.

What you’ll need to get the job done

5+ years of full stack engineering experience.

Proficiency in React, Node, Typescript, Go, Python and CloudSQL (or similar relational database).

Track record of shipping high-quality products at scale.

Strong knack for getting the visuals right.

You understand observability and enjoy digging into the details to solve performance and user experience issues.

You excel in a rapidly growing organization and embrace challenging problems, tackling them directly and taking the initiative to lead the solution.

Eagerness to work in a fast-paced, dynamic environment and constantly grow & develop your craft.

Expert communication and ability to collaborate seamlessly with product teams.

Experience with fintech or consumer apps is a plus.

Tech

React frontend with Styled Components

Material-UI and CSS modules for styling

React-query/Axios for API calls

Typscript/Node, Python, Go, and Socket.io in the backend

CloudSQL & Redis

Hosted on Google Cloud Run and k8s

Github, Linear, Slack, Notion

What we offer

Interesting and challenging work

Competitive base salary (commensurate with experience) + up to 20% annual bonus + generous early employee equity

100% medical, dental, and vision insurance coverage for you and your dependents (U.S.)

Unlimited PTO

Parental leave

Beautiful NYC office in the heart of Flatiron

Herman Miller Aeron Desk Chair

Food (snacks, frequent lunches, and often dinner for those working late)

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Senior / Staff Product Engineer at Knot — hirly