Top Tech Jobs & Startup Jobs in NYC, NY

Provide Tier 3 enterprise support for AppGate’s ZTNA solution by resolving complex customer issues, troubleshooting deployments and network integrations, analyzing logs, conducting root cause analysis, and testing issues in lab environments. Create technical documentation, present solutions, mentor L2 engineers, collaborate with development and deployment teams, maintain case records, and participate in an on-call rotation.

Own Duolingo’s global paid user acquisition strategy and growth goals across multiple products and 100+ markets. Lead a performance marketing team, manage multichannel budgets, optimize campaigns, evaluate incrementality and user quality, and oversee creative testing. Partner with agencies, ad technology providers, Product, Engineering, Social, Brand, and regional marketing teams to improve acquisition, retention, measurement, and return on investment. Provide clear strategic recommendations to leadership and scale effective channels.

Plans, manages, and optimizes full-funnel paid social programs across Meta, TikTok, Pinterest, Snapchat, and Reddit. Uses audience strategy, creative testing, automation, measurement, and platform analytics to grow customers, revenue, and lifetime value while controlling CAC and waste. Partners with clients and internal teams, designs experiments, maintains tracking health, communicates business impact, and develops repeatable best practices.

Build and maintain scalable security platforms, automation, APIs, detections, and internal tooling for a cloud-native SaaS environment. Secure AI applications, LLM services, identities, SaaS platforms, cloud infrastructure, and APIs. Develop controls against prompt injection, data leakage, model misuse, and excessive permissions while supporting vulnerability management, incident response, threat modeling, and security operations.

Build production agentic AI systems and internal automation for business teams. Prioritize high-impact workflows, develop multi-step LLM agents, integrate platform capabilities, implement human-in-the-loop controls, and establish reusable design patterns. Evaluate reliability, accuracy, speed, and failure modes while collaborating with nontechnical stakeholders. The role requires strong Python and backend engineering skills, production LLM experience, systems thinking, and the ability to operate independently in ambiguous problem spaces.

Leads the configuration, deployment, operation, governance, and security of enterprise AI platforms and agentic infrastructure. Manages models, agents, prompts, skills, MCP servers, integrations, access controls, monitoring, guardrails, lifecycle management, usage, and costs. Partners with infrastructure, development, security, compliance, and data teams to support HIPAA-aligned deployments, technical risk reviews, vendor evaluations, standards, runbooks, and AI architecture initiatives. Provides operational dashboards, technical governance, and after-hours support as required.

Own InstaLILY’s enterprise security program across cloud, application, AI-agent, identity, compliance, incident response, and customer trust. Lead SOC 2, HIPAA, and GDPR programs; harden GCP and AWS environments; implement secure SDLC practices, threat modeling, IAM, SSO, MDM, and incident-response processes; manage penetration testing and remediation; represent security to enterprise CISOs; and hire 1–2 security or AppSec engineers. This hands-on player-coach role reports to the CEO and requires substantial coding and architecture work.

Develop and enhance backend systems, services, APIs, and core product features. Improve codebase maintainability, reliability, and scalability while operating mission-critical systems in production. Participate in on-call incident resolution, automated monitoring and instrumentation, recruiting, interviewing, and mentoring. The role emphasizes distributed systems, automated testing, continuous integration, and measurable business impact.

Develop and maintain scalable software applications using Java, Spring Boot, microservices, and AWS cloud services. Translate business requirements into technical solutions, design and implement backend systems, optimize performance and cost, write unit and integration tests, troubleshoot distributed services, and evaluate new technologies. The role also includes mentoring developers, collaborating with product management, supporting offshore teams, and ensuring accessibility, security, and coding standards.

Supports global TCP/IP, VPN, MPLS, and financial-market network infrastructure in a 24x7 NOC environment. Responsibilities include monitoring systems, triaging incidents, troubleshooting routing, protocols, circuits, hardware, and multicast market data, configuring Cisco, Arista, and Juniper equipment, coordinating vendors and maintenance activities, managing tickets, and supporting customer escalations. Provides second-level network support, change management, operational readiness checks, and rotating after-hours on-call coverage.