Top Tech Jobs & Startup Jobs in NYC, NY

Design, develop, and deploy secure smart contracts and blockchain protocol integrations across multiple chains. Collaborate with backend and product teams, research DeFi technologies, participate in security audits, and troubleshoot on-chain incidents. The role focuses on scalable Web3 payments infrastructure, cross-chain communication, protocol reliability, and secure smart contract systems.

Investigate complex blockchain account and transaction support cases across multiple chains. Verify wallet and account details, use blockchain explorers and internal tools, document auditable case files, and escalate recurring issues or policy gaps. The role requires strong technical judgment, meticulous documentation, and work within defined approval frameworks. It is primarily in person at the company’s Midtown New York City headquarters Monday through Thursday, with optional remote work on Fridays.

Own complex fintech product initiatives end to end, from problem definition and requirements through launch, measurement, QA, and iteration. Collaborate with Product, Design, Engineering, Payments, and Data to simplify blockchain-based onboarding, deposits, account access, and money movement. Apply strong technical fluency, product judgment, analytics, and exceptional attention to quality, edge cases, and user experience.

Build and deploy full-stack onboarding, checkout, and money-movement solutions for strategic fintech customers. Lead technical discovery, architecture, scoping, prototyping, customer evaluations, production rollouts, and cross-functional roadmap planning. Collaborate with Sales, Product, Customer Success, engineers, and executives while helping establish the Forward Deployed Engineering team and scalable development processes.

As a Backend Engineer at Fun.xyz, you will build and maintain backend services for a Web3 payments platform, ensuring high performance and reliability.

Join Fun.xyz as a Product Engineer to design and scale SDK software for Checkout, collaborating across stacks and teams to innovate crypto payment solutions.

Build and lead a first-of-function compliance program for a fintech bridging fiat and crypto. Own sanctions screening, policies, vendor selection, compliance-by-design integration, advisory relationships, and documentation. Advise product and engineering on controls for non-custodial architectures and on-chain risk.

Accelerate Fun.xyz's growth by cultivating partnerships in fintech, closing enterprise deals, and representing the company at industry events. Requires 5+ years in sales or BD with strong fintech and crypto knowledge.

As a Protocol Engineer, you will design and develop secure smart contracts and blockchain protocols, collaborate with teams, and research new technologies for decentralized finance solutions.

Own end-to-end product design for consumer-facing fintech/crypto flows (onboarding, deposits, withdrawals). Create adaptive, high-conversion experiences, design systems, and motion that enhance usability. Collaborate closely with PMs and frontend engineers, drive design decisions, and execute autonomously with a strong focus on visual craft and quality.