Backend Engineer

fun.xyz • San Francisco, CA

1d • $150,000 - $300,000 • Hybrid

About The Position

Fun is seeking a Backend Engineer for its Payments Infrastructure team to help architect backend services that power its Web3 payments infrastructure. The role will shape how payments, settlement, and transaction routing work across chains and payment providers. The engineer will build high-performance, low-latency systems supporting use cases such as asset conversion, identity and security verification, transaction finality, and decentralized routing, while helping ensure fault tolerance, scalability, and compliance for a global user base. The role is available at Mid, Senior, Staff, or Principal levels.

The position is primarily in person at Fun’s Midtown, NYC headquarters. The team works together Monday through Thursday, with optional work from home on Fridays.

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.
• Solid understanding of computer science fundamentals, including data structures and algorithms.
• Strong problem-solving skills and ability to debug complex technical issues.
• Clear communication skills and ability to collaborate effectively with cross-functional teams.

Nice To Haves

• Production TypeScript experience.
• Previous work at a crypto startup or Web3 infrastructure company.
• Experience with blockchain integrations, smart contracts, or DeFi protocols.
• Background in 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.

Responsibilities

• Design, build, and maintain high-performance APIs and backend services for the Web3 payments platform.
• Build features that improve the 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.
• Contribute to incident response and debug production issues to ensure system reliability.

What This Job Offers

• Job Type: Full-time
• Career Level: Mid Level
• Education Level: No Education Listed