--- title: 'Backend Engineer (Singapore) at fun.xyz' canonical: 'https://feeny.ai/job/backend-engineer-singapore-fun-xyz-singapore-0z1txgff9rvd' type: 'job' last_seen: '2026-09-09' --- # Backend Engineer (Singapore) at fun.xyz - **Company:** fun.xyz - **Location:** Singapore - **Employment:** full-time - **Work type:** hybrid - **Posted:** 2025-05-13 - **Last confirmed live:** 2026-09-09 - **Apply:** https://jobs.lever.co/funxyz/006c67e4-cf9a-4644-85fb-9b4c314f1090 ## 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 BackEnd Engineer to join our growing team at Fun and help architect the backend services that power our web3 payments infrastructure. This role is foundational to the success of our platform and will shape how payments, settlement, and transaction routing are handled across chains and payment providers. You’ll be working on high-performance, low-latency systems that support complex use cases like asset conversion, identity and security verification, transaction finality, and decentralized routing, while ensuring fault tolerance, scalability, and compliance across a global user base. ## What You’ll Do - Design, build, and maintain high-performance APIs and backend services that power our Web3 payments platform - Build new features to further our product experience - Collaborate with product and protocol teams to architect technical solutions that meet business requirements - Write clean, well-tested code and participate in code reviews to maintain high engineering standards - Contribute to incident response and debugging production issues to ensure system reliability Required Skills and Qualifications - Strong experience building production backend systems with modern languages - Proficiency in Typescript - Deep understanding of distributed systems, APIs, and database design principles - Hands-on experience with cloud platforms and containerization technologies - Solid grasp of computer science fundamentals including data structures and algorithms - Strong problem-solving skills with ability to debug complex technical issues - Clear communicator who can collaborate effectively with cross-functional teams ## Nice to Have (But Not Required) - Production TypeScript experience - Previously worked at crypto startup or Web3 infrastructure company - Experience with blockchain integrations, smart contracts, or DeFi protocols - Background with high-scale payment processing or financial compliance systems - Contributions to open source projects or technical writing - Experience with event-driven architectures and real-time data processing ## 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 ## 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 - [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 - [People and Culture Associate](https://feeny.ai/job/people-and-culture-associate-fun-xyz-new-york-tnbh9865meg7) — 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 - [Protocol Engineer](https://feeny.ai/job/protocol-engineer-fun-xyz-new-york-jb4jex5zrfn3) — New York, NY - [Product Engineer (Singapore)](https://feeny.ai/job/product-engineer-singapore-fun-xyz-singapore-3pakjzvr6hkm) — Singapore