---
title: 'Product Engineer at fun.xyz'
canonical: 'https://feeny.ai/job/product-engineer-fun-xyz-new-york-gxhq2r4nbfwq'
type: 'job'
last_seen: '2026-09-16'
---

# Product Engineer at fun.xyz

- **Company:** fun.xyz
- **Location:** New York, NY
- **Compensation:** $155k–$300k
- **Employment:** full-time
- **Work type:** hybrid
- **Posted:** 2025-01-14
- **Last confirmed live:** 2026-09-16
- **Apply:** https://jobs.lever.co/funxyz/c44ae922-48ac-470c-b325-a943ea6c94e6

## Job description

Capital markets are undergoing a fundamental shift. Assets that live in fragmented systems and manual workflows are moving onto blockchains -systems designed to move and store value more transparently and efficiently.

While this unlocks more open and programmable financial systems, it also introduces significant complexity. For most users, interacting with this new infrastructure is still too difficult.

Fun builds the infrastructure that powers consumer-facing fintech applications - handling onboarding, account access, and money movement so users can interact with blockchain-based systems as seamlessly as they do with traditional finance.

For fintech builders, Fun provides a best-in-class onboarding and deposit stack that drives conversion and unlocks user growth. We operate at the intersection of financial infrastructure, complex engineering, and product experience.

## 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. In this role, you'll design and scale SDK software that powers Checkout across web2 and web3 environments, working across the stack on systems that balance performance, reliability, and UX. You'll collaborate closely with protocol, backend, and business teams to solve complex challenges and build tools that scale globally to meet the evolving demands of on-chain payments. Crypto experience is a plus, but fast learners from any technical background are welcome.

## Requirements

- 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

## Nice to Have

- 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

● Shape the future of payments and programmable money ● Work with bleeding-edge tech in a domain where innovation moves fast ● Join a mission-driven team focused on access, openness, and trust ● Be a key contributor, not just a cog—your work will ship fast and matter ● Collaborate with top-tier protocols, builders, and financial infrastructure providers

Location and Work Environment This role is primarily in-person at our Midtown, NYC headquarters. We work together Monday through Thursday for fast, iterative collaboration and optional WFH Fridays to reset and recharge.

## About fun.xyz

## Company Overview
- **One-liner**: Fun builds financial infrastructure for modern capital markets, providing a unified layer where digital assets and fiat converge for instant, global, programmable value movement.
- **Entity Type**: Private (Series A)
- **Headquarters**: New York, NY, USA
- **Founded**: 2022
- **Founders**: Alex Fine (Co-Founder & CEO)

## Core Business
- **Primary industry**: Financial infrastructure / Cryptocurrency payments
- **Target customers**: B2B – large fintech platforms, applications that need high-converting, white-label deposit/withdrawal/settlement flows
- **Mission**: “Financial infrastructure for modern capital markets. Built for the next era of money.” – unify fiat and digital assets into a seamless, global layer.

## Products & Services
- **Deposit** (launched 2026): A new category for global payments that replaces fragmented on-ramps and bridges with a single, unified flow. [fun.xyz/linkedin post via Coindesk](https://linkedin.com/company/funxyz)  
- **Exchange OS** (announced 2026): A protocol upgrade that democratizes market creation on X (likely referring to a blockchain platform). [linkedin.com/company/funxyz](https://linkedin.com/company/funxyz)  
- **White-label checkout platform for web3**: Enables users to execute on-chain actions using cards, EVM tokens, or centralized exchanges. [builtin.com/company/funxyz](https://builtin.com/company/funxyz)  
- **Settlement & payment flows**: Engineered around user behavior, powering deposits, withdrawals, and settlement for the largest fintech applications.

## Market Standing
- **Valuation/Market Cap**: Not disclosed. Total funding of **$82.9M** (Seed rounds $3.9M + $7.0M, Series A $72.0M).  
- **Key Metric**: Revenue not publicly available (third-party estimate of $30K may be nominal). Series A announced in May 2026.  
- **Notable Investors/Partners**: Multicoin Capital and SignalFire (co-led Series A), Streamlined, Infinity Ventures, Cory Levy, JAM Fund, Pharsalus Capital.  
- **Growth Signals**:  
  - Headcount grew **109.3% YoY** to 28 employees.  
  - Opened a Singapore office (APAC expansion).  
  - Monthly website traffic grew **1,078.1% YoY**.  
  - Currently hiring for 10 roles (Backend, Product, Sales, etc.).

## Competitive Advantages
- **Unified infrastructure** – Eliminates fragmentation between fiat and crypto, on-ramps, bridges, and chains.  
- **White-glove, white-label** approach – Built around each client’s user behavior for highest conversion.  
- **Engineering craftsmanship** – “Good enough is never enough” culture; deep tech stack (Solidity, TypeScript, Python, Kubernetes, etc.).  
- **Early mover** in the “internet capital markets” category with strong investor backing.

## Strategic Focus
- **APAC expansion** via Singapore office and local hiring.  
- **Acquisitions** to deepen infrastructure (funds from Series A).  
- **Scaling the team** – actively hiring engineers, product designers, and business development leads.  
- **Product development** – advancing Exchange OS and Deposit as core platforms.

## Why Work Here
- **Culture**: Values of _Relationships_, _Craftsmanship_, and _Whatever it takes_ – a team of exceptional engineers taking ownership, sweating details, and solving high-leverage infrastructure problems.  
- **Work model**: Hybrid – offices in New York, NY and Singapore. OnSite workspace per Built In; job postings list hybrid.  
- **Team**: Small but hyper‑growth (28 employees, +109% YoY); strong talent from Amazon, MIT Media Lab, OP Labs, Netflix.  
- **Perks**: Not formally listed, but the Series A announcement emphasizes “most meaningful work of your career” and a focus on craft. Likely competitive compensation and equity in a well‑funded startup.

## Sources
1. [fun.xyz/about](https://fun.xyz/about)  
2. [fun.xyz/news/series-a](https://fun.xyz/news/series-a)  
3. [linkedin.com/company/funxyz](https://linkedin.com/company/funxyz) (company page and job postings)  
4. [builtin.com/company/funxyz](https://builtin.com/company/funxyz)  
5. [jobs.lever.co/funxyz](https://jobs.lever.co/funxyz) (careers page)

## Other roles at fun.xyz

- [L2 Support Associate](https://feeny.ai/job/l2-support-associate-fun-xyz-new-york-tdfn6eshe4ez) — New York, NY
- [Senior Support Lead](https://feeny.ai/job/senior-support-lead-fun-xyz-new-york-z98rkrfcfs3n) — New York, NY
- [Senior Product Manager](https://feeny.ai/job/senior-product-manager-fun-xyz-new-york-m6jtb49an62b) — New York, NY
- [Forward Deployed Engineer, Enterprise](https://feeny.ai/job/forward-deployed-engineer-enterprise-fun-xyz-new-york-ypqd5cdqcz9p) — New York, NY
- [Senior Counsel](https://feeny.ai/job/senior-counsel-fun-xyz-new-york-x6bk9sk084q4) — New York, NY
- [Head of Compliance](https://feeny.ai/job/head-of-compliance-fun-xyz-new-york-1dkcnxjykwej) — New York, NY
- [Marketing Lead](https://feeny.ai/job/marketing-lead-fun-xyz-new-york-s7wqqmy0bk2n) — New York, NY
- [Senior Product Designer](https://feeny.ai/job/senior-product-designer-fun-xyz-new-york-s1vk5n430t1p) — New York, NY
- [Business Development](https://feeny.ai/job/business-development-fun-xyz-new-york-5cx9dh4ss6dd) — New York, NY
- [Protocol Engineer (Singapore)](https://feeny.ai/job/protocol-engineer-singapore-fun-xyz-singapore-ysk6k1wk0jvh) — Singapore