Top Principal Software Engineer Jobs in NYC, NY

Lead enterprise architecture and deliver highly scalable, fault-tolerant distributed systems. Define standards for microservices, API governance, observability, CI/CD, and reliability engineering. Drive modernization, capacity planning, performance tuning, cross-team technical initiatives, and mentor senior engineers while resolving critical production issues.

Build and own end-to-end, AI-native full-stack systems across underwriting, claims, finance, and member products. Ship products using React/React Native, TypeScript, Python, and Postgres; design retrieval/memory/evaluation systems; collaborate with operational teams and AI engineers to eliminate manual work and scale core insurance infrastructure.

The Lead Principal Software Engineer/Systems Architect will design and implement SoundCloud's core API architecture, mentor engineering teams, and ensure system reliability and scalability while driving modernization efforts using AI and agentic workflows.

Lead and deliver complex full-stack projects; design and build high-performance features and services using Node.js, React/React Native, MongoDB, Python, and GCP; drive technical vision and product strategy; monitor platform performance in a high-volume marketplace; mentor junior engineers and help scale the team. Role is NYC-based with typically 3+ days/week in office.

As a Principal Software Engineer at Arlo, you'll design and build AI-driven systems for insurance operations, enhancing workflows and member experiences across various functions including underwriting and claims.

As a Principal Software Engineer, you'll architect version 2 of an AI claims management platform, designing complex systems for insurance claims handling while mentoring engineers and collaborating with leadership.

Seeking Senior, Lead, or Principal Engineers for backend roles in building scalable AI-powered supply chain solutions, focusing on data integration and platform architecture.

The Principal Software Engineer will lead the design and build-out of an AI Context Layer, ensuring high-quality data for AI systems, while managing access control and developer interfaces, and leading cross-team projects.

The role involves leading initiatives for vector search in Elasticsearch, enhancing features, resolving bugs, and contributing to community engagements in a distributed team setting. A strong background in vector similarity and Java is crucial.

The Principal Software Engineer in Test I evaluates software performance, conducts testing, optimizes efficiency, collaborates with teams, and monitors systems post-deployment.

Lead technical vision and architecture for Dockers Developer Tools: build a self-service internal platform, CI/CD and build systems, integrate AI/LLM agents, set SDLC tenets, establish standards for observability, security, reliability, and productize internal tooling into customer offerings.

The Principal Software Engineer will define and drive architectural solutions for streaming media across Disney's platforms, lead cross-functional collaborations, and champion best practices in system design and operational excellence.

The Principal Software Engineer will lead the architectural direction and improvement of metadata management systems for Disney's streaming services, leveraging advanced technologies and best practices in software development.

Lead the architecture of Commerce Hub by defining core domain models, building intricate systems, and mentoring engineers while influencing product strategy.

Designs and implements scalable software solutions as a Calypso SME, integrating Calypso with market utilities, developing Java/MQ/APIs, applying Agile best practices, conducting code/design reviews, and mentoring engineers.

Lead end-to-end design, development, and quality of cloud-based enterprise software solutions for caregivers. Define quality criteria, estimate costs, manage risks and engineering processes, integrate systems, and act as technical leader across large, complex projects.

Design, build, and maintain end-to-end, accessible, secure full-stack software for a federal health/civilian agency. Build Section 508-compliant UIs, backend APIs, and services; follow API-first, CI/CD, automated testing, and security best practices; identify and remediate technical debt; mentor engineers and collaborate with cross-functional teams to deliver reliable, performant government software.

Lead platform strategy, architecture, and hands-on development. Design, build, deploy, and operate high-performance, fault-tolerant integrations and platform enhancements. Drive security/compliance, mentor engineers, recruit senior talent, align technology with business goals, and communicate technical vision to stakeholders.

Design, architect, and build enterprise Java microservices and APIs; lead technical delivery, mentor engineers, implement cloud-native and CI/CD practices, design database schemas and PL/SQL, and develop blockchain/digital-asset solutions including smart contract work and lifecycle integration in financial services.

Design and implement scalable full-stack solutions for institutional platforms. Lead API and microservices design, cloud (AWS) deployments, CI/CD and DevSecOps, collaborate with product and QA, troubleshoot production, and mentor distributed teams.

Lead architecture and implementation of high-performance software to deploy and operate AI/ML models for network threat detection. Build autonomous AI agent workflows, production ML pipelines, and services; drive cross-team engineering standards, mentor engineers, and represent technical direction to leadership.

As a Principal Engineer, you will lead AI-driven backend systems for audit products, ensuring scalable, reliable workflows while mentoring teams and influencing technical direction.

The Principal Software Engineer - Web is responsible for designing and developing new features for Yahoo Mail, mentoring peers, and enhancing user experience. This role requires strong knowledge of web technologies and collaboration with cross-functional teams to deliver high-quality updates and improvements.

Lead architecture and technical direction for Ruby on Rails and React systems, design scalable APIs and front-ends, own services/databases/infrastructure (MariaDB, Redis, Elasticsearch), use Kubernetes for scaling, integrate AI-assisted development workflows, mentor engineers, and deliver secure, well-tested production releases.

The Principal Software Engineer will lead architectural direction, integrate AI capabilities, mentor engineers, and tackle complex technical challenges for scalable systems.