Senior Software Engineer, Fullstack
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 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 American Express, 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, along with Lydia Jett of SoftBank Group.
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 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 for API calls
PHP/Laravel, Typescript/Node, Python, Socket.io in the backend
CloudSQL & Redis
Hosted on Google Cloud Functions and Kubernetes
Github, Linear, Slack, Notion
What 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
Recommended Jobs
Chief operating officer
Position Title: Chief Operating Officer (COO) Location: New York City Metropolitan Area (One of the five boroughs) Job Type: Full-time | Onsite Schedule: Monday – Friday | 9:00…
Head coach
COACHING VACANCY Modified COMPETITIVE CHEER Head Coach POSTING DATE Thursday, October 16, 2025 REQUIREMENTS CPR/AED/First Aid Certificate, SAVE/DASA/CAIR Workshops, Fingerprint Cleara…
Accounts Receivable/Payables Specialist - Process Tech
Full-time Description The Accounts Receivable/Payable Specialist is responsible for processing Accounts Receivable , Accounts Payable and Order Management as well as other duties in support …
Sr. Manager, CLS Strategic Sourcing
Requisition Number: 70064 The company built on breakthroughs. Join us. Corning is one of the world’s leading innovators in glass, ceramic, and materials science. From the depths of …
Remodeling helper
Mad City Windows & Baths, a company backed by Renuity, is a reputable, well established remodeling company that is hiring immediately for remodeling helpers. We are expanding rapidly throughout the M…
Director, Commerce Media
Mars United Commerce is an award-winning, independently owned global commerce marketing practice with a growth-for-clients focus. With talent spanning the Americas, Europe and Asia, we create breakt…
Billing Coordinator
Company Description About SOCOTEC: SOCOTEC is a provider of niche consulting services within the architecture, engineering and construction industries focusing on high-performance buildings a…
Assistant Bookkeeper / Office Admin
Accelerate your career with a fast-growing, exciting company that’s changing a traditional industry every day. Rapid Roofing is seeking a reliable, organized, and detail-driven Office Administrator /…
Integrated Circuit Designer
Responsibilities: Performing design and layout of superconductor digital and mixed-signal circuits. Qualifications and Experience: ~Ph.D. or MSEE ~More than five years’ experience ~Proficiency i…
Senior Growth Product Manager
Allara is a telemedicine platform delivering expert, multidisciplinary healthcare for women with hormonal conditions, covered by many insurance plans. Allara’s comprehensive telehealth platform pair…