Principal Software Engineer
Principal engineer owning full-stack features on Mesh, ZoomInfo's internal AI platform. Builds AI agents, workflows, microapps, and SDKs while mentoring engineers and maintaining production reliability.
Principal Full Stack Engineer – Web & Mobile
Principal Full Stack Engineer builds and maintains end-to-end customer-facing features across React web and React Native mobile apps, integrating backend APIs and optimizing performance. Requires 6+ years experience, expertise in JS/TS, React, React Native, and cross-functional collaboration.
150k – 300kNew York, NYFullstack EngineeringOnsite6+ YOE
About the role
Core Responsibilities
- Build and maintain customer-facing products using React (web) and React Native (mobile).
- Implement features end-to-end: frontend UI, backend API integration, data management, and performance optimization.
- Collaborate with product designers to create intuitive, responsive UX across multiple platforms.
- Identify opportunities to reuse components and unify shared UI patterns and tooling.
- Ensure stability and high performance on both web and mobile through testing, metrics, and monitoring.
- Contribute to backend endpoints where needed to support frontend features.
- Advocate for scalable front-end architecture and clean, maintainable code.
Qualifications
- 6+ years of professional experience building full stack applications.
- Expert in JavaScript / TypeScript with hands-on experience in React and React Native.
- Familiarity with mobile-first design principles and web/mobile performance considerations.
- Experience integrating with backend services, RESTful APIs, and real-time data updates.
- Comfortable operating across frontend and backend boundaries to ship cohesive products.
- Excellent communication skills and ability to partner with product and design teams.
What Makes You Stand Out
- Contributions to React or React Native open-source libraries.
- Experience in fintech or regulated systems with strict reliability expectations.
- Past work on consumer apps with rapid release cadences.
- Thought leadership on frontend architecture and tooling.
Skills
ReactReact NativeJavaScriptTypeScriptREST APIsBackend ServicesReal-Time Data
Similar roles
Fullstack Engineering jobsPrincipal Software Engineer
Designs and builds distributed systems, high-performance APIs, and LLM-powered features for ZoomInfo's real-time B2B marketing platform. Requires 5+ years in backend/data engineering with expertise in distributed systems, big data, or applied AI/ML.
Member of Technical Staff, TypeScript Engineer (Principal)
Principal TypeScript engineer owning end-to-end platform features for AI agent building, from API design and SDKs to UIs. Requires 4+ years TypeScript experience, full-stack fluency, system design skills, and high ownership.
Senior Principal Software Engineer
Architects scalable infrastructure for ZoomInfo's unified data platform using GraphQL federation across BigTable, BigQuery, and Solr. Drives real-time data processing, observability, and multi-tenant systems with 12+ years experience in distributed data platforms.