Top Tech Jobs & Startup Jobs in NYC, NY

Lead ownership of web performance: set architecture, standards, and tooling for rendering, caching, CDNs, and observability. Optimize critical rendering path, implement caching/CDN strategies, build RUM and synthetic monitoring, and drive performance standards across engineering.

Own mobile infrastructure across iOS and Android, including release automation, CI, testing, observability, crash stability, and phased deployments. Build quality gates, device and simulator infrastructure, alerting, and measurement systems for a high-traffic trading app. Extend the toolchain with AI evaluation harnesses, developer agents, and AI-assisted workflows, while fixing app-level crash clusters and hardening error paths.

Own monthly, quarterly, and annual US GAAP close processes across multiple entities, including consolidated reporting and statutory filings. Maintain and expand SOX controls, apply complex technical accounting standards, support CFTC and regulatory filings, improve accounting systems and workflows, advise on product launches and M&A, and mentor junior accounting staff.

Design, build, and scale low-latency backend services for Polymarket’s real-time exchange. Develop event-driven pipelines and APIs, optimize latency and throughput, maintain production reliability, diagnose incidents, and contribute to distributed-systems architecture focused on correctness, graceful degradation, and recovery. Collaborate across product, infrastructure, and data teams in a highly autonomous environment.

Build and own Android trading-app features across payments, real-time market data, and core UI. Develop performant Jetpack Compose interfaces, maintain CI/CD and Gradle configuration, integrate WebSockets, gRPC, and streaming data, and improve Android architecture and engineering practices. Collaborate independently with a distributed team and use AI tools to accelerate development.

Own end-to-end, multi-state payroll processing, including wages, bonuses, commissions, deductions, benefits, tax withholding, remittance, reconciliations, reporting, and year-end filings. Configure and improve Rippling or Deel, identify compliance gaps, build scalable payroll controls and processes, and partner closely with HR, Legal, and Finance on employee changes and compensation. Support audits and complex compensation structures involving equity, crypto, or tokens.

Own the user growth engineering function, building and optimizing onboarding, KYC, acquisition funnels, and fullstack features from account creation through first trade. Analyze funnel performance, run experiments, make architectural decisions, coordinate across engineering teams, and improve technical quality through code reviews and mentorship. The role requires strong frontend and backend depth, product judgment, cross-functional communication, and independent execution in a high-growth environment.

Owns Polymarket’s end-to-end creative operations pipeline across paid social, lifecycle, partnerships, and brand. Responsibilities include managing briefs, prioritization, production workflows, asset libraries, approvals, staffing, freelancers, vendors, compliance, and performance reporting. The role connects advertising data to creative iteration, improves throughput and cycle times, manages rights-holder approvals, and builds scalable systems that enable high-volume creative delivery.

Design, build, and scale low-latency backend services powering Polymarket’s exchange. Develop event-driven pipelines and APIs, optimize latency and throughput, ensure production reliability, diagnose incidents, and contribute to distributed-systems architecture focused on correctness, failure recovery, and graceful degradation.

Lead sports and league partnership creative from brief through launch across co-branded campaigns, in-app experiences, paid social, display, CTV, and events. Build reusable design systems, manage licensing compliance and partner approvals, direct motion designers, and collaborate with performance marketing using live data. The role requires strong sports visual identity expertise, hands-on execution, external partner management, and the ability to deliver high-quality work quickly in ambiguous, high-visibility environments.