5-7 years of experience building backend systems using modern programming languages
Proficient in Typescript for developing backend applications
In-depth knowledge of distributed systems and API design
Familiarity with cloud platforms and containerization tools
Understanding of computer science principles, data structures, and algorithms
Excellent debugging and problem-solving skills
Strong verbal and written communication for cross-team collaboration
Responsibilities
Design and maintain high-performance APIs for the Web3 payment platform
Develop new features to enhance product functionality
Collaborate with product teams to design technical solutions that align with business goals
Implement clean, well-tested code and engage in code review processes
Assist in incident management and debugging to maintain system reliability
Benefits
Flexible work schedule with office days Monday to Thursday and remote Fridays
Opportunity to work with cutting-edge Web3 technologies
Join a mission-driven company focused on a tokenized future
Potential for personal growth in a growing segment of the tech industry
Collaborative work environment with cross-functional teams
Full Job Description
About the Role
We're looking for a BackEnd Engineer to join our growing team at Fun.xyz 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.
Location: Midtown, New York, NY and Singapore (In-office Mon-Thurs, Remote Fridays) Team: Payments Infrastructure - Mid, Senior, Staff, or Principal Levels
Responsibilities
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
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 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
