Senior Software Engineer, Fullstack

Company: Knot API
Location: New York
Posted on: May 1, 2025

Job Description:

About KnotKnot'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 product allows consumers to instantly update & manage their cards on file with online merchant accounts (e.g. Netflix or PayPal). 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 - Rory and Kieran O'Reilly - and today powers connected online payment experiences for hundreds of thousands of consumers. Companies like Current, BILT, and Fizz 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, along with Lydia Jett of SoftBank Group.Working at KnotWe'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 on Knot's CardSwitcher and Subscription Management products.
• Build brand new products alongside existing features to drive further value for end users.
• Develop user interfaces with React/TypeScript on the frontend and Laravel/PHP 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, Laravel/PHP, 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
    • PHP/Laravel, Typescript/Node, Python, in the backend
    • CloudSQL & Redis
    • Hosted on Google Cloud Functions and Kubernetes
    • Github, Linear, Slack, NotionWhat we offer
      • Interesting and challenging work
      • Competitive base salary + generous early employee equity + benefits
      • 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
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Keywords: Knot API, New York , Senior Software Engineer, Fullstack, IT / Software / Systems , New York, New York