Top Principal Engineer Jobs in NYC, NY

Lead technical ownership of a global platform for safe change: distributed key-value storage, progressive configuration delivery, testing and health-mediation. Write production code, design systems, review senior proposals, integrate LLMs, and drive cross-team initiatives to improve reliability, rollout safety, and developer productivity.

Lead operational readiness reviews for large-scale data center projects, identify design/construction/commissioning gaps, drive corrective actions, validate turnover readiness, coordinate across design, construction, commissioning, and operations to ensure mission-critical infrastructure meets standards and is handed off reliably.

Design and build next-generation ads formats, backend infrastructure, and scalable distributed systems. Lead technical direction, collaborate across teams to define product requirements, experiment, analyze and optimize ad performance, and ensure availability, scalability, operational excellence, and cost management. Mentor engineers and apply AI tools and high-velocity workflows to deliver production-ready systems.

Lead architecture, modernization, and development of Group Insurance applications. Modernize mainframe monoliths into Java microservices and micro-frontends on cloud, mentor distributed Agile teams, collaborate with enterprise architecture, product owners and infrastructure, and enable test automation and integrations. Approximately 10% domestic travel.

Principal-level front-end architect responsible for defining and enforcing front-end architecture, performance budgets, and delivery strategy. Own edge/CDN and web delivery, RUM and Core Web Vitals instrumentation, and guardrails for component/state/rendering strategy. Provide hands-on technical leadership, drive island architecture adoption, address adversarial traffic concerns, and collaborate with stakeholders to deliver performant, resilient reader experiences.

Define engineering vision and drive technical strategy for enterprise platforms supporting CMS QMARS. Build paved paths focused on developer experience, observability, and design/content enablement while modernizing systems to reduce provider burden and improve patient care.

Lead long-term strategy and architecture for cloud and on‑prem platform infrastructure, driving Kubernetes and multi‑cloud reliability, IaC/GitOps automation, observability, SLO/SLI/error‑budget practices, incident leadership, AI‑augmented tooling adoption, and mentorship of senior engineers to improve platform resilience and developer experience.

Design, architect, and implement cloud-first full-stack software using Java/C# and JavaScript frameworks. Provide technical leadership, mentor engineers, improve architecture and performance, promote CI and automated testing, and support customer implementation and cloud platform operations.

Lead DevEx strategy and execution across inner-loop and outer-loop developer experiences. Align platform, CI/CD, IDP, and SRE teams, define productivity metrics (DORA/DX), drive AI-enabled SDLC adoption, improve CI/CD reliability and predictability, and mentor engineering teams to scale developer productivity.

As a Senior Principal Engineer, you'll define and drive the technical strategy for customer experience platforms, lead architectural decisions, and mentor engineering teams to enhance customer and agent experiences.

Lead design, build, deployment, and operation of highly resilient, high-throughput configuration and publishing systems. Define long-term architecture and strategy, mentor senior engineers, diagnose and fix performance bottlenecks, and leverage AI tools to improve engineering productivity and platform capabilities.

As a Principal Engineer - Steam Turbine, you will lead steam turbine engineering activities, mentor junior engineers, and support business development efforts while participating in client meetings and conferences.

Lead semiconductor laser testing and Burn-In operations, focusing on capacity planning, equipment development, and cross-functional collaboration. Oversee die-level optoelectronic testing, manage vendor relationships, and define operational strategies for high-volume manufacturing.

The Principal Engineer provides technical leadership for engineering productivity, influences platform direction, and improves developer experience through assessment and implementation of solutions across teams.

As a Principal Engineer, you will set the engineering vision, lead technical direction, and drive strategy across enterprise platforms, focusing on developer experience and scalability. Responsibilities include designing solutions, collaborating across teams, establishing engineering standards, and mentoring other engineers, all while ensuring alignment with broader business goals.

The Principal Engineer will architect and develop scalable AI-driven data platforms, mentoring engineers and aligning technical strategies with business goals.

Lead technical direction with the CTO, architect and build high-scale distributed systems, mentor engineers, ship product roadmap, manage cloud infrastructure and orchestration, enforce CI/CD, testing and fault-tolerance, and collaborate with product and business teams while leveraging AI/ML frameworks.

The Associate Principal Engineer for CRM Salesforce is responsible for designing and developing enterprise solutions and integrations, with a focus on marketing and data platforms.

Senior individual contributor owning system integration and operational readiness for fiber and wireless product launches. Leads ORT, defines end-to-end BSS/OSS integrations, drives automation and vendor coordination, presents business cases to leadership, and ensures scalable subscriber transitions and platform migrations.

Lead architecture and implementation of a Kubernetes-native platform for broadcast production: design Crossplane-based provisioning, build Go operators/controllers, automate AWS multi-account networking, integrate Puppet-managed bare-metal, own RBAC/identity, drive GitOps CI/CD, observability, VDI and security integrations, and mentor engineers.

Lead engineering as the first onshore senior hire: set architecture across telehealth, EHR, patient dashboard and AI; write production code; direct and mentor offshore engineers; establish engineering standards, reliability, security (HIPAA), hiring, and on-call/incident practices while partnering with the CEO.

Lead design and build of scalable backend systems and data platforms; own architecture and production deployments; improve reliability, performance, and observability; mentor engineers and collaborate with Product, Data Science, SRE, and Security.

Lead end-to-end technical strategy and modernization of iHerb's product catalog platform. Define architecture, data models, APIs, and service boundaries; write production code; drive cross-team technical decisions, mentorship, and AI-driven SDLC standards. Coordinate multi-team efforts, ensure engineering quality, and represent engineering across product, data science, security, and infrastructure.

Own and drive the end-to-end mobile platform architecture for iOS and Android, lead a mobile modernization effort, write production mobile code and prototypes, set technical standards, evaluate cross-platform frameworks, mentor senior engineers, coordinate multi-team architecture reviews, and integrate AI-driven SDLC practices across the engineering organization.

Lead architecture and technical direction across the stack: design and document backend systems, APIs, and serverless infrastructure; write production code; set standards for testing, observability, CI/CD, and deployments; partner with product and leadership to translate problems into scalable solutions; guide technical strategy and collaborate with mobile, design, and clinical teams.