Top Tech Jobs & Startup Jobs in NYC, NY

Own the finance function across Cayman, Brazil, the US, Canada, and UAE. Responsibilities include month-end close, audits, budgeting, treasury and liquidity, fund NAV, revenue recognition, tax and regulatory filings, intercompany accounting, payments, payroll, and finance systems. Lead a small team, improve reconciliation processes, support product launches, and coordinate with legal, compliance, operations, product, and HR. The role requires hands-on crypto, multi-entity, multi-currency, and international finance experience.

Build and operate DeFi yield vaults, including Solidity smart contracts, backend services, NAV and redemption systems, automated on-chain operations, monitoring, and risk tooling. Review new protocols, assess security and yield strategies, manage rebalancing transactions, collaborate with auditors, and help ensure vaults operate safely around the clock.

Build and improve credit card transaction systems and fraud controls. Investigate declined authorizations, failed transactions, stuck holds, and fraudulent activity. Own Sardine rules, queues, scoring, monitoring, alerting, and automated mitigation. Query transaction data, investigate fraud cases, identify root causes, and create rules to prevent recurrence. Develop internal tools, dashboards, and scripts while partnering with Product, CX, Compliance, and external card and fraud vendors.

Owns ether.fi’s global commercial and partnership strategy across Cash payments, card networks, crypto ecosystems, chains, institutional relationships, and market expansion. Responsibilities include sourcing and negotiating complex agreements, structuring pricing and incentive deals, evaluating build-versus-partner decisions, managing counterparties, enabling chain deployments, and overseeing ongoing partner performance. The role requires strong fintech, payments, crypto, DeFi, commercial modeling, and independent deal execution experience.

Own Ether.fi’s fraud defense stack across real-time monitoring, alerting, mitigation, fraud rules, behavioral scoring, dashboards, and operational playbooks. Investigate emerging threats including cashback farming, card testing, merchant abuse, friendly fraud, money laundering, and malicious ecosystem activity. Partner with engineering, customer experience, compliance, and external partners to reduce risk across the company’s credit card program and fund flows.

Build and maintain frontend components for Ether.fi’s consumer DeFi products. Collaborate with designers to translate Figma designs into polished user experiences, develop client-side transaction and fund-management integrations, ship high-quality code, uphold frontend security practices, and contribute to refactoring and engineering excellence.

Lead analytics to turn onchain data into insights for product growth, retention, and investor reporting. Build dashboards tracking TVL, funnels, vault performance, and cash flows; analyze onchain and market data; benchmark competitors; collaborate cross-functionally to inform launches, incentives, and retention; translate data into clear narratives.

As an Intermediate Front End Engineer, you'll collaborate with designers and engineers to develop user-focused features, maintain core products, and ensure code quality and security.

Develop, test, and deploy smart contracts on Ethereum, ensuring security and efficiency while staying updated on blockchain advancements. Collaborate on best practices.

As a Senior Full Stack Software Engineer, you will oversee complete feature delivery for core products, collaborate with designers and engineers, and focus on user adoption metrics. The role requires 5+ years of professional coding experience, with a plus for web3 experience.