Product Engineer
Fun
Product
New York, NY, USA
Posted on Nov 14, 2025
Company Description
At Fun.xyz, we believe a tokenized future is a beneficial inevitability, granting financial emancipation to everyone with an internet connection. For a blockchain-first global economy to exist, value exchange must become intuitive, secure, and seamless.
Enter Checkout - the highest converting payment solution in web3. By integrating Checkout, dApps enable users to complete any on-chain action using crypto from a wallet, centralized exchange, or on-ramped fiat from a card or bank account. With access to market-leading routing and their asset portfolio at the point of sale, users are faster, stickier, and more engaged. For dApps, Checkout scales their user acquisition potential without launching new chains or integrating multiple third party providers.
We built Checkout because we envision a world where anyone, anywhere, can purchase anything with any asset. If that sounds like a vision you can get behind, we want to hear from you.
About The Role
We’re looking for a talented Product Engineer (Mid, Senior, Staff) to join our team and help shape the future of crypto payments.
Design and scale SDK software that powers Checkout across web2 and web3 environments
Work across the stack on systems that balance performance, reliability, and UX
Collaborate with protocol, backend, and business teams to solve complex challenges
Build tools that scale globally and meet the evolving demands of on-chain payments
Crypto experience is a plus, but fast learners from any technical background are welcome.
Required Skills And Qualifications
3+ years of engineering experience with JavaScript, TypeScript, and modern frameworks
Strong understanding of full-stack development, including React and backend APIs
Attention to detail in both product design and user interaction
Proven track record building scalable, high-performance software
Desired Qualities
Familiarity with blockchain technologies and EVM-compatible networks
Comfortable solving difficult technical problems in agile environments
Experience working on payments, SDKs, or crypto-related systems
Passion for building secure, efficient, and accessible tools
What Sets You Apart
You've contributed to open-source projects or built SDKs/dev tools
You have shipped products from 0 to 1 in a fast-paced setting
You thrive in ownership-heavy environments and pride yourself on execution
You approach problem-solving with thoughtfulness, precision, and rigor
Why Join Us
Work on cutting-edge products that power the next era of web3
Collaborate with exceptional teammates across engineering, design, and protocol
Take on meaningful ownership in a mission-driven and high-impact company
Push the boundaries of what’s possible in decentralized payments
Location and Work Environment
This role is primarily in-person at our Midtown NYC HQ, with in-office collaboration Monday–Thursday and optional WFH Fridays.
We may use artificial intelligence (AI) tools to support parts of the hiring process, such as reviewing applications, analyzing resumes, or assessing responses. These tools assist our recruitment team but do not replace human judgment. Final hiring decisions are ultimately made by humans. If you would like more information about how your data is processed, please contact us.
At Fun.xyz, we believe a tokenized future is a beneficial inevitability, granting financial emancipation to everyone with an internet connection. For a blockchain-first global economy to exist, value exchange must become intuitive, secure, and seamless.
Enter Checkout - the highest converting payment solution in web3. By integrating Checkout, dApps enable users to complete any on-chain action using crypto from a wallet, centralized exchange, or on-ramped fiat from a card or bank account. With access to market-leading routing and their asset portfolio at the point of sale, users are faster, stickier, and more engaged. For dApps, Checkout scales their user acquisition potential without launching new chains or integrating multiple third party providers.
We built Checkout because we envision a world where anyone, anywhere, can purchase anything with any asset. If that sounds like a vision you can get behind, we want to hear from you.
About The Role
We’re looking for a talented Product Engineer (Mid, Senior, Staff) to join our team and help shape the future of crypto payments.
Design and scale SDK software that powers Checkout across web2 and web3 environments
Work across the stack on systems that balance performance, reliability, and UX
Collaborate with protocol, backend, and business teams to solve complex challenges
Build tools that scale globally and meet the evolving demands of on-chain payments
Crypto experience is a plus, but fast learners from any technical background are welcome.
Required Skills And Qualifications
3+ years of engineering experience with JavaScript, TypeScript, and modern frameworks
Strong understanding of full-stack development, including React and backend APIs
Attention to detail in both product design and user interaction
Proven track record building scalable, high-performance software
Desired Qualities
Familiarity with blockchain technologies and EVM-compatible networks
Comfortable solving difficult technical problems in agile environments
Experience working on payments, SDKs, or crypto-related systems
Passion for building secure, efficient, and accessible tools
What Sets You Apart
You've contributed to open-source projects or built SDKs/dev tools
You have shipped products from 0 to 1 in a fast-paced setting
You thrive in ownership-heavy environments and pride yourself on execution
You approach problem-solving with thoughtfulness, precision, and rigor
Why Join Us
Work on cutting-edge products that power the next era of web3
Collaborate with exceptional teammates across engineering, design, and protocol
Take on meaningful ownership in a mission-driven and high-impact company
Push the boundaries of what’s possible in decentralized payments
Location and Work Environment
This role is primarily in-person at our Midtown NYC HQ, with in-office collaboration Monday–Thursday and optional WFH Fridays.
We may use artificial intelligence (AI) tools to support parts of the hiring process, such as reviewing applications, analyzing resumes, or assessing responses. These tools assist our recruitment team but do not replace human judgment. Final hiring decisions are ultimately made by humans. If you would like more information about how your data is processed, please contact us.