over 1 year ago
Singapore, SingaporeMid Level
Responsibilities
- Design, build, and maintain high-performance APIs and backend services for the Web3 payments platform.
- Build product features supporting payments, settlement, transaction routing, asset conversion, verification, and related workflows.
- Collaborate with product and protocol teams to architect solutions meeting business requirements.
- Write clean, well-tested code and participate in code reviews.
- Contribute to incident response and debug production issues to support system reliability.
Requirements
- 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.
- Strong computer science fundamentals, including data structures and algorithms.
- Strong problem-solving and debugging abilities and effective cross-functional communication.
- Preferred: production TypeScript experience, crypto or Web3 infrastructure experience, blockchain integrations, smart contracts, DeFi protocols, high-scale payment processing, financial compliance systems, open source contributions, technical writing, event-driven architectures, or real-time data processing.
Benefits
- Opportunity to shape the future of payments and programmable money.
- Work with emerging technology in a rapidly evolving domain.
- Join a mission-driven team focused on access, openness, and trust.
- Become a key contributor whose work ships quickly and has meaningful impact.
- Collaborate with protocols, builders, and financial infrastructure providers.
Tech Stack
Categories
About fun.xyz
Fun.xyz builds crypto payment infrastructure and developer tools—APIs, SDKs, and checkout—to let companies accept and send onchain payments across assets and blockchains. It sells enterprise-grade payments and wallet services to fintechs, consumer apps, and marketplaces, with usage-based and transaction fees. Privately held and headquartered in New York, it raised a Series A in 2026.