Top Tech Jobs & Startup Jobs in NYC, NY

Build and productionize quantitative models for equity swaps, securities lending, and prime brokerage. Deliver client-facing custom basket and portfolio solutions, apply ML/LLMs to flow and funding prediction, architect AWS-native Python systems, and partner with traders and global quants to drive P&L, liquidity management, and automated analytics.

Lead design, development, testing, deployment and support of cloud-native Java microservices and APIs. Build event-driven data pipelines using Kafka, work with AWS EKS/ECR/EC2/Beanstalk, implement CI/CD and containerization, collaborate in Agile teams, and drive technical alignment and innovation across IB Tech & CRM/Analytics.

Lead institutional ETF trading across equity and fixed-income ETFs: make markets, manage principal risk, provide liquidity and execution, advise institutional clients, monitor flows and market structure, collaborate with sales/research/capital markets, and drive franchise growth.

Perform financial modeling and fundamental research on public technology and information services companies; write timely research reports; track industry themes and trends; maintain company and industry relationships; interact with institutional sales, corporate, and buy-side clients; attend industry events and meet tight deadlines.

Support senior analysts on U.S. chemicals equity research by building and maintaining earnings, cash flow, and valuation models; using Excel, Python, and AI workflows for forecasting and scenario analysis; writing and editing research publications; and analyzing industry, macro, and supply‑chain drivers for commodity, specialty, and diversified chemical producers.

Develop and maintain Jefferies' high-performance fixed-income e-trading platform focused on credit products. Build scalable, highly available real-time trading applications, support existing infrastructure (ION, Java, Kdb), collaborate with traders and quants to gather requirements, and champion SDLC and test-driven development while balancing delivery with governance and compliance.

Lead the accounting function for multiple entities and investment vehicles, overseeing monthly/quarterly/annual close, GAAP financial reporting and consolidation, audits, internal controls, regulatory compliance, and transaction/post-close accounting. Partner with deal teams, treasury, legal, FP&A and senior leadership. Drive finance transformation efforts (ERP upgrades, reporting automation) and lead and mentor a team of accounting professionals.

Lead and scale international ETF primary market capabilities, executing creations and redemptions across non-U.S. equity markets. Engage institutional clients, APs, issuers, and sales teams; manage basket composition, settlement, custodial coordination, FX integration, and operational troubleshooting. Partner with trading leadership and technology to automate processes and improve execution and reconciliation.

Lead Java engineer role responsible for designing, implementing, and delivering cloud-native, event-driven data platforms and Java-based APIs. Drive end-to-end SDLC, mentor distributed engineering teams, enforce best practices, and collaborate with product and data specialists to build scalable, fault-tolerant systems using AWS, Kafka, Spring Boot, Kubernetes, and CI/CD.

Design, develop, and support high-performance swaps trading and post-trade systems focused on corporate actions processing. Implement trade capture, booking, validation, lifecycle events, settlements, reconciliations, and event-driven workflows. Collaborate with trading, operations, risk, finance, and technology teams, troubleshoot production issues, and contribute to architecture, code reviews, testing, and engineering best practices.