Top Principal Engineer Jobs in NYC, NY

Lead architecture and delivery of a cloud-native Strategic Trade Management platform for FICC and Derivatives. Build low-latency microservices (Java/Python/gRPC), modernize legacy systems, embed agentic AI workflows, ensure real-time valuations and auditability, collaborate with trading, quant, risk, and compliance, and mentor engineers to drive platform standards and engineering excellence.

Hands-on principal engineer responsible for designing, modernizing, and supporting low-latency Equity Cash electronic trading platforms. Lead cross-team architecture, ensure resilience/observability/compliance, translate trading requirements into solutions, mentor engineers, and govern secure, auditable LLM/GenAI integrations and developer productivity tooling.

Lead the architecture and operation of Managed databases for AI workloads, ensuring high-scale, low-latency solutions while mentoring teams on best practices.

Technical leader responsible for architecting and building high-performance POS payment integrations. Drive platform-level technical strategy, develop Kotlin/JVM services, integrate hardware SDKs and EMV card payments, ensure security/key management, observability, and API design, mentor engineers, and collaborate across teams to deliver scalable, mission-critical payment solutions.

Lead the engineering architecture for an AI-driven product, focusing on system design, collaborating with AI agents, and ensuring quality and scalability in large-scale SaaS environments.

The Principal Developer Productivity Engineer will enhance GM's developer tools, mentor engineers, and drive system performance through observability and software engineering best practices.

The Principal Software Engineer will lead architecture, mentorship, and technical execution for scalable systems, influencing product strategies.

Lead the design and implementation of an Internal Developer Portal. Mentor engineers, drive automation standards, and enhance engineering productivity for Mastercard's software development teams.

This role involves leading technical projects across multiple teams, designing scalable systems, collaborating with cross-functional teams, and mentoring engineers, focusing on payroll and tax systems at Gusto.

Responsible for ensuring security and integrity in technology operations, providing expertise in security engineering, and collaborating with teams to embed security measures in API design and deployment.

Lead Developer Platform GTM strategy for acquisitions and strategic initiatives: evaluate opportunities, build financial models, run developer-focused diligence, own GTM integration planning and execution, coordinate cross-functional teams, track post-integration business health, and create repeatable playbooks to scale future initiatives.

Lead strategy and operations to grow Cloudflare's developer PAYGO business: own PAYGO forecasting, design growth campaigns, scale programs and partnerships, translate developer and AI trends into adoption motions, and drive cross-functional execution and incubation to increase acquisition, activation, retention, and expansion.

The Principal Engineer will lead the engineering team in building systems across full stack, improving development efficiency, and expanding products in new markets.

Lead technical strategy and architecture for Developer Experience: build scalable build/test/delivery systems, improve CI/CD throughput, design internal platforms/APIs/SDKs/CLIs, integrate LLM/agentic tooling safely, mentor senior engineers, and drive cross-team initiatives to increase engineering velocity, reliability, and maintainability at organizational scale.

The Associate Principal Linux Systems Engineer will manage Linux systems, ensure high availability, perform routine maintenance, and support online game infrastructure.

The Principal Software Engineer will develop ads infrastructure, lead technical direction for the Ads Platform, and ensure high availability and performance of systems. Responsibilities include collaborating across teams and advocating for best practices.

Lead vision and roadmap for large-scale recommender systems across Spotlight, Discover, and Friend Stories. Technically lead engineering teams, design next‑generation recommender and retrieval architectures, incorporate SOTA research and foundation models, advance ML infrastructure for scalability and reliability, and partner cross-functionally to drive experimentation, operational excellence, and cost-effective production deployments.

As a Principal AI/ML Engineer, you will lead the development of machine learning solutions for advertising, focusing on optimization, personalization, and deploying models within a highly scalable infrastructure.

Lead technical pre-sales and strategic advisory for Zero Trust Cloud solutions across hybrid and multi-cloud environments. Drive Proof-of-Value engagements, collaborate with sales, SEs, and product teams, influence product roadmap, and present Zero Trust strategies to technical and executive stakeholders to accelerate regional GTM.

The Principal Data Engineer at NBCUniversal leads the development of data applications, manages data pipelines, and collaborates with teams while coaching junior engineers. Responsibilities include designing scalable data solutions and integrating AI technologies.

Own and modernize Upsides analytics data platform: migrate pipelines, reduce cost, improve governance, design reusable modeling/orchestration patterns, deliver domain-critical data products, lead cross-functional initiatives, mentor engineers, and support ML and product teams.

Lead architectural decisions, mentor engineers, and drive technical strategies for scalable software systems, focusing on high-quality solutions and system health.

The role involves defining and driving a holistic developer experience strategy, improving CI/CD systems, integrating AI into workflows, and guiding internal developer platforms.

Lead architecture and technical direction for core Scala/Java systems, drive cross-team delivery, improve reliability and performance, standardize platform patterns and tooling, embed secure-by-design practices, mentor senior engineers, and advance AI-first engineering workflows. Collaborate with global teams and support occasional international travel.

Lead and own platform architecture and standards across backend services and infrastructure. Ensure reliability, scalability, observability, and developer experience. Drive cross-team initiatives (multi-tenancy, permissions, async workflows), perform high-impact system redesigns, mentor senior engineers, ship architectural improvements, and align technical strategy with product and leadership.