Top Principal Engineer Jobs in NYC, NY

The role involves enhancing application security for Radar, managing security for over 1 billion API calls daily, and collaborating with customers.

Principal Full Stack Engineer responsible for architecting, developing, deploying, and modernizing internal platforms and AI-enabled products. The role is 70–80% hands-on coding, with ownership of architecture, engineering standards, governance, and technology strategy. They will mentor senior engineers, partner with product managers and stakeholders, establish reusable components and processes, guide technology adoption, and drive scalable software engineering practices across the organization.

Lead technical direction and architecture across telehealth, EHR, patient and clinician systems. Be a hands-on principal engineer writing production code, set engineering standards, mentor and direct offshore teams, own reliability and security (HIPAA/compliance), drive AI adoption, hire and build the onshore engineering org, and partner with the CEO to translate business and clinical needs into technical plans.

Design, build, deploy, and maintain resilient, scalable production systems for Toast’s retail customers. The role sets long-term technical architecture and strategy, communicates technical direction, mentors senior engineers, improves engineering productivity, diagnoses performance issues, and drives initiatives amid ambiguity. Engineers collaborate directly with retail customers, visit stores, understand operational workflows, and use AI tools to improve development velocity and quality.

Full‑stack engineer role building AI-powered RCM automation, modern EHR features (AI scribes, intake automation, analytics), and data pipelines for claims and clinical records. Work spans backend, frontend, and data processing to deliver production AI systems for behavioral health.

Designs and implements Disney’s hyperscale platform services layer supporting Disney+, ESPN, and Hulu. Owns architecture and production software for API gateways, authentication, observability, resiliency, experimentation, and AI-ready infrastructure. Establishes platform standards, golden paths, schemas, SLOs, and reliability practices; leads technical investigations, build-versus-buy decisions, cross-organization roadmaps, and executive-level technical influence. Mentors senior engineers and drives broad adoption of shared platform services across hundreds of engineering teams.

Leads electrical engineering design and delivery for municipal and industrial water and wastewater facilities, including treatment plants and pump stations. Provides technical leadership, client advising, design review, construction support, project oversight, mentoring, and business development. Develops power distribution, control, communications, lighting, and electrical infrastructure solutions while managing scope, schedule, budget, quality, and risk. Travel up to 25% is expected.

Define and advance Mastercard’s enterprise data architecture strategy across hybrid cloud and on-premises environments. Lead modernization of global data platforms, establish architecture standards, enable batch and real-time analytics, and promote Data Mesh and data-as-a-product capabilities. Ensure security, resiliency, governance, regulatory compliance, and scalability across AWS, Azure, and GCP. Advise executive stakeholders, evaluate emerging AI-enabled data technologies, and mentor global engineering teams.

Leads Mastercard’s enterprise data architecture strategy across hybrid cloud and on-premises environments. Defines secure, resilient, compliant architecture standards; modernizes legacy platforms across AWS, Azure, and GCP; and advances Data Mesh, real-time streaming, batch analytics, and AI-enabled data capabilities. Serves as a senior technical authority and executive advisor, evaluates emerging technologies, drives architecture governance, and mentors global engineering 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.

The Principal Software Engineer will lead architectural design, mentor engineers, influence technical strategy, and drive AI-augmented development across the platform, ensuring high-impact project delivery in healthcare technology.

Architect and deliver high-performance, scalable platform services across GitHub (Actions, Identity, Billing, Git systems, DB infra). Lead design through production, mentor engineers, own reliability and on-call responsibilities, design APIs, collaborate cross-functionally, drive roadmaps, and champion security and operational excellence.

Design, build, and operate large-scale, highly available platform services across GitHub (Actions, Enterprise AI, Identity, Billing, Git systems, database infrastructure). Provide technical leadership, mentor engineers, own architecture and APIs, participate in on-call incident response, drive reliability, security, testing, and roadmap decisions across cross-functional teams.

Lead silicon photonics and heterogeneous integration development from concept through manufacturing readiness. Responsibilities include process-flow integration, photonic device and advanced packaging development, DOE execution, process characterization, yield improvement, defect reduction, root-cause analysis, design-rule development, tapeouts, technology transfers, technical roadmaps, and AI-enabled engineering initiatives. The role collaborates with design, device, packaging, manufacturing, and supplier teams to deliver optical connectivity technologies for high-performance computing and AI infrastructure.

Leads architecture, solution design, engineering direction, and modernization across Guardian’s annuity technology ecosystem. The role guides policy administration, servicing, distribution integrations, data, digital experiences, and enterprise platforms. Responsibilities include defining technology roadmaps and guardrails, modernizing legacy systems, developing API- and event-driven cloud-native solutions, improving reliability and engineering practices, enabling third-party distribution, and mentoring technical teams. The Principal Engineer partners with business, product, architecture, engineering, and external stakeholders to deliver scalable, secure, resilient platforms.

Owns enterprise backend, cloud, endpoint, and security platforms across Microsoft 365, Azure, AWS, Windows, and Linux. Builds CI/CD pipelines, infrastructure-as-code automation, monitoring, certificate management, and policy enforcement. Leads platform upgrades, incident escalation, disaster recovery, audit readiness, FFIEC compliance, documentation, and cross-functional technology initiatives. Provides technical oversight, coaches professionals, and aligns infrastructure solutions with business needs.

Leads enterprise backend and cloud platform engineering across Microsoft 365, Azure, AWS, operating systems, security, certificates, end-user computing, DevOps, and automation. Builds CI/CD and infrastructure-as-code solutions, oversees migrations and upgrades, manages compliance and audit readiness, and supports disaster recovery. Serves as an escalation point for incidents, coordinates cross-functional infrastructure and security teams, maintains documentation and operational reporting, and ensures alignment with FFIEC and other regulatory requirements.

Designs, administers, and optimizes IBM z/OS storage infrastructure, including DASD and virtual tape platforms. Manages replication, disaster recovery, GDPS recovery environments, backup, cyber resiliency, capacity planning, performance optimization, and data lifecycle policies. Develops automation and monitoring solutions, troubleshoots complex storage issues, supports resiliency testing, and collaborates with infrastructure, application, operations, engineering, and vendor teams on modernization and continuous improvement.

Volunteer Principal Front End Developer to build React/React Native web and mobile features, mentor engineers, implement scalable full‑stack solutions, ensure cross‑browser compatibility and testing, work with Node/MongoDB/AWS, attend weekly standups, and support a fundraising launch. Minimum 4 hours/week commitment.

Volunteer Principal Full Stack Engineer to lead and contribute across frontend and backend (React/React Native, Node.js, MongoDB). Own feature development, mentor engineers, collaborate with product/design, ship scalable code, and support CI processes. Must commit 4+ hours weekly and attend a weekly standup; first task includes launching a fundraising campaign.

Develop, maintain, and optimize mission-critical backend APIs and scalable cloud services for web and mobile clients. Implement secure, high-performance systems, automated tests, observability, and technical documentation. Mentor peers, follow best practices, and support a proof-of-concept launch and fundraising activities as a volunteer contributor.

Designs and operates platform software integrating AppGate services with Linux systems. Responsibilities include Python development, process and service management, systemd, networking, PostgreSQL automation, observability with OpenTelemetry, secure platform tooling, testing, architecture, production troubleshooting, and technical leadership. The role also involves cross-team initiatives, mentoring, documentation, and improving engineering workflows in a distributed remote environment.

Design and scale critical, highly-available services; set technical direction across teams; apply best practices for availability, scalability, cost, and operational excellence; leverage AI tools and high-velocity workflows; mentor engineers and solve ambiguous, company-wide technical problems.

Lead technical strategy and architecture for Fanatics Betting and Gaming’s scalable, fault-tolerant platform. Design cross-cutting systems, guide complex initiatives across teams, establish engineering standards, resolve systemic technical risks, and improve reliability, security, performance, and operational readiness. Partner with Engineering, Product, Platform, and Security leaders while mentoring senior engineers and influencing executive-level technical decisions.

Designs, deploys, integrates, and maintains secure VDI environments across on-premises and cloud platforms. Engineers Citrix, Azure Virtual Desktop, and AWS WorkSpaces solutions; administers Windows and Linux systems; manages identity, profiles, images, packaging, and integrations. Builds cloud infrastructure using CloudFormation, Terraform, and Ansible, automates operations, maintains security posture, supports monitoring and remediation, and prepares technical documentation. Requires active Secret clearance, Top Secret eligibility, and occasional after-hours support.