Top Principal Software Engineer Jobs in NYC, NY

Develop and enhance production-quality derivatives pricing models, risk analytics, and quantitative tools on JPMorganChase’s Athena Python platform. Partner with portfolio managers, traders, quants, and technology stakeholders across rates, credit, and equities. Support trade lifecycle analytics, troubleshooting, hedging, and risk aggregation while creating reusable software frameworks. Lead agentic AI-enabled engineering workflows with appropriate security, resiliency, validation, and governance controls.

The role involves designing and developing core features for the Linux sensor in CrowdStrike's security platform, collaborating with teams across the company, and maintaining software quality for cross-platform delivery.

Leads technical strategy and software architecture across Streaming Hub application teams. Oversees modernization, API standards, cloud infrastructure, CI/CD, testing, observability, resiliency, and AI-assisted engineering practices. Provides design oversight, drives technical-debt reduction, improves developer productivity and operational performance, mentors senior engineers, and partners with Engineering, Product, Architecture, and Quality Assurance teams to deliver scalable, secure, reliable software.

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 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.

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.

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 architecture and technical execution for Toast’s Payroll and Team Management products. Own authentication, authorization, and organizational hierarchy across a multi-tenant SaaS platform. Drive high-scale, full-stack initiatives, modern agentic development practices, integrations, technical strategy, quality standards, deployment practices, and cross-functional collaboration. Mentor engineers across teams and leverage AI tools and LLM integration to improve software development velocity and quality.

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.

Lead design and build of production-ready cloud and AI systems, prioritize security and reliability, ship solutions quickly using modern engineering practices, collaborate with cross-functional teams, mentor engineers, drive customer adoption, and deliver reusable assets and end-to-end complex deliveries.

Design, develop, and maintain a native IBM i connectivity agent for Redwood RunMyJobs. Responsibilities include job submission and monitoring, spool and queue handling, CL/RPG invocation, security integration, API connectivity, troubleshooting, performance and reliability improvements, architecture, code reviews, testing, documentation, and collaboration with product and engineering teams. The role also requires validating AI-assisted solutions against authoritative IBM i documentation.

Build and maintain a Java-based connectivity agent integrating Redwood RunMyJobs with IBM z/OS. Responsibilities include JES, TSO, SMF, USS, security, cryptography, custom protocols, C/JNI integration, concurrency, troubleshooting, performance, architecture, testing, documentation, and collaboration. The role requires deep mainframe systems expertise, strong Java and C skills, DevOps experience, and sound judgment when using AI-assisted engineering tools.

Leads architecture and development of Azure Storage table, metadata, and indexing systems at massive cloud scale. Designs distributed-system primitives for partitioning, indexing, transactions, consistency, replication, caching, and high-performance data access. Drives architectural decisions, prototypes innovations through production, and improves performance, scalability, reliability, and cost efficiency. Requires deep expertise in distributed storage, databases, or large-scale systems.

Designs and leads large-scale software subsystems, architecture, coding standards, code reviews, debugging tools, performance optimization, refactoring, and QA automation. Guides business and technical solution definition, evaluates production readiness using objective metrics, and develops web content management, workflow automation, integrations, and database solutions. The role is telecommuting eligible throughout the United States.

Define architectural direction for Azure Specialized platform services and lead the design of highly available distributed cloud systems. Drive reliability, scalability, observability, security, diagnostics, and operational improvements across engineering organizations. Establish service health frameworks, SLOs, metrics, and governance for mission-critical services. Mentor engineers, influence technical strategy, resolve complex cross-system challenges, and advance AI-assisted troubleshooting and platform modernization.

Work with customers and cross-functional teams to design, build, and deliver cloud-based solutions. Lead design, identify dependencies, mentor engineers, act as DRI and on-call, and improve availability, reliability, observability, and performance. Contribute to open-source assets and collaborate with Microsoft product teams to produce extensible, maintainable code and scalable solution patterns.

Design and implement PostgreSQL internals, indexing, query engine extensions, and storage-layer features to support large-scale document workloads on Azure. Profile distributed systems, tune performance, collaborate with open-source communities, conduct design/code reviews, and drive cross-team alignment for mission-critical database features.