Top Principal Software Engineer Jobs in NYC, NY

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.

Principal frontend-focused software engineer responsible for leading frontend architecture, standards, tooling, accessibility, performance, testing, and deployment practices. The role delivers scalable customer-facing web applications, component libraries, and design systems using React or Angular. It includes cross-functional product collaboration, technical decision-making, mentoring, modernization initiatives, and occasional full-stack work. The position is remote, requires U.S. citizenship, Public Trust 6C eligibility, and approximately 0–10% business travel.

Lead the technical vision, architecture, and roadmap for Pika’s web and multiplatform creative products. Design scalable user-facing systems, real-time collaboration, messaging, generative AI workflows, and cross-service observability. Partner with product and design leaders from ideation through launch, while driving architecture reviews, technical excellence, mentorship, and engineering strategy.

Leads the strategic direction of backend and full-stack engineering, architects scalable distributed systems and microservices, and drives modernization, reliability, security, and performance initiatives. Designs APIs, data architectures, pipelines, infrastructure, and observability practices; delivers customer-facing service improvements; establishes engineering standards; and mentors engineers. Collaborates across product and technical teams to make architecture and business trade-offs and lead large-scale initiatives from vision through production.

Build and maintain high-performance, low-latency Java trading systems for Cboe’s FX platform. Lead architecture and technical direction for distributed, multithreaded, real-time applications; optimize performance, ensure reliability, and resolve critical production issues. Mentor engineers, influence cross-team decisions, translate business requirements into technical solutions, document systems, and promote AI-powered development tools.

Design and build scalable AI-first experimentation and growth systems: telemetry, experiment assignment, feature flighting, rollout automation, and risk controls. Lead cross-team initiatives, partner with Product/Data Science/Design, write production code, review implementations, and raise engineering and experimentation quality across products.

Provides hands-on technical leadership for Pantheon’s P1 zero-to-one product and company-wide engineering strategy. Owns architecture across real-time collaboration, APIs, data, publishing, integrations, and developer experience; establishes reliability, security, observability, and delivery standards; guides build-versus-buy decisions; mentors senior engineers; partners with product, design, security, infrastructure, and customers; and contributes code to validate architecture and unblock critical initiatives.

Lead the architecture, technical strategy, and roadmap for Microsoft's Windows ML compiler stack. Design high-performance compiler infrastructure, execution engines, optimization frameworks, and developer tools supporting CPU, GPU, and NPU workloads. Drive NPU enablement, graph optimization, scheduling, memory management, code generation, and hardware abstraction. Partner with silicon vendors and internal teams, influence AI hardware and platform strategy, lead cross-team initiatives, and mentor engineers developing on-device and generative AI capabilities.

Lead legacy application assessments and modernization strategy for U.S. Air Force systems. Own architectural decisions, technical direction, and test strategy while collaborating with government engineers, vendors, product managers, researchers, and designers. Promote secure, compliant, agile engineering practices; coach government teams; evaluate technical environments; communicate recommendations; and demonstrate modern AI-assisted development practices. The role is fully remote, requires U.S. citizenship and CAC eligibility, and involves occasional quarterly travel to Air Force bases.

Lead end-to-end design and delivery of AI-infused, enterprise full-stack applications on Azure. Architect resilient solutions, build Copilot/agentic features, enforce engineering best practices, mentor engineers, collaborate with PM/UX teams, ensure quality/reliability, and support production services and integrations.

Own cross-team, platform-level engineering initiatives end-to-end: architecture, migrations, observability, on-call, and customer outcomes. Drive AI-native tooling and agentic AI adoption, mentor senior engineers, and set technical standards across teams.

Lead the architecture and evolution of managed Kubernetes and cloud-native services. Provide cross-team technical oversight, standardize platform practices, integrate open-source technologies, improve scale, performance, security, and operational efficiency, and mentor engineering teams. The role requires expertise in Kubernetes-based platforms, container runtimes, cloud-native architectures, and Go, Python, or Bash.

Own the architecture and technical direction of core systems, including backend services, APIs, data flows, infrastructure, reliability, and developer tooling. Lead cross-cutting initiatives such as EHR integrations, multi-tenancy, and scaling; establish engineering standards; deliver architectural improvements; and mentor engineers. The role requires hands-on design and operation of large-scale distributed systems and collaboration with product, leadership, and clinical stakeholders.

Owns platform-wide architecture and technical direction for backend services, infrastructure, APIs, data flows, reliability, developer tooling, and cross-cutting initiatives. The role designs and operates distributed systems, leads architectural improvements, establishes engineering standards, mentors engineers, and partners with product, leadership, and clinical stakeholders. Responsibilities span system design through production operations, including EHR integrations, multi-tenancy, scalability, observability, and healthcare-compliant platform development.

Design, develop, integrate, and support critical components for statistical arbitrage and low-latency electronic trading platforms. The role is 80% hands-on C++ engineering and 20% mentoring and coordination. Responsibilities include microsecond-latency optimization, architecture, technical leadership, Level 3 production support, and collaboration with business stakeholders. The engineer will lead small technical teams and apply DevOps, Agile, and Site Reliability Engineering practices in colocated execution environments.

As a Principal Software Engineer, you will lead the development of AI-driven sales and support agents, designing major product features and driving innovation while mentoring peers and ensuring code quality.

Architect and develop foundational edge-computing runtime and integration platforms for connected-home devices. Build software models for device, spatial, and occupancy data; prototype and productionize new concepts; evaluate architectures; and provide technical leadership through design reviews, coding standards, mentoring, and cross-functional collaboration. The role spans edge computing, IoT, distributed systems, embedded environments, intelligent agents, networking, and secure systems within an exploratory R&D organization.

Lead the architecture and modernization of a complex enterprise SaaS platform while remaining hands-on with critical software design and development. Define technical direction, improve scalability, reliability, security, performance, and maintainability, and guide design and code reviews. Partner across engineering and product teams, resolve complex technical challenges, establish engineering standards, mentor engineers, and translate architectural strategy into practical delivery.

Lead the technical vision, roadmap, and development of Elasticsearch’s ES|QL analytical engine and query capabilities. Design data-intensive systems, algorithms, APIs, and compute infrastructure; research search and analytics technologies; collaborate across product and engineering teams; mentor senior engineers; and contribute hands-on modern Java development. The role requires autonomous technical leadership, expertise in database internals and analytics systems, and the ability to guide complex projects from conception through delivery.

Lead architecture and technical direction for an AI-first SaaS product (Growth Studio). Define scalable services, APIs, data flows, and AI-enabled workflows; guide integrations, run architecture/code reviews and POCs; mentor engineers; produce technical documentation; and partner with product, UX, QA, and ops to deliver reliable, secure, and maintainable platform capabilities for GovCon customers.

Own the end-to-end design, development, deployment, and production operation of a proprietary investment platform across Java and Python services on AWS. Build fault-tolerant, event-sourced, real-time systems with strong correctness, auditability, idempotency, and deterministic replay. Partner with investment and compliance teams, establish engineering standards for testing, CI/CD, observability, and security, and use agentic coding tools to accelerate delivery. Help define architecture, mentor engineers, and shape the growing engineering organization.

The Principal Engineer will design scalable backend services and APIs, optimize performance, and improve developer experience while collaborating with AI/ML experts and legal specialists.

Lead design and development of high-volume, low-latency full-stack applications, collaborating with product and architecture teams. Drive microservices and API-first implementations on cloud (AWS), ensure SRE practices, define AI governance and best practices, coach and mentor engineers, document technical solutions, and facilitate communication across technical and non-technical stakeholders.

Designs and builds full-stack cloud applications with AI-powered features for supply chain and operations. Responsibilities include integrating ML models and LLM APIs, developing agentic workflows and MCP servers, modeling knowledge graphs and ontologies, establishing engineering standards, implementing CI/CD and testing, monitoring production systems, and mentoring junior engineers. The role also leads complex application projects and translates business problems into reliable, production-ready solutions.

Set technical direction for Elastic Cloud Serverless control-plane initiatives, designing distributed systems that orchestrate projects across AWS, Google Cloud, and Azure. Lead multi-quarter, cross-team delivery; write and review Go code; improve reliability, security, and cost efficiency; investigate incidents; participate in on-call; mentor engineers; and advise product and engineering leaders on technical trade-offs and roadmap decisions.