Principal Software Engineer

ZoomInfo

Principal Software Engineer leading the design and development of ZoomInfo's customer-facing GraphQL API platform. Focused on high-impact contributions and scalability in B2B intelligence.

Posted 6/12/2026full-timeBethesda • Maryland, New Jersey, New York • 🇺🇸 United StatesLead💰 $163,800 - $257,400 per yearWebsite

Tech Stack

Tools & technologies

BigQueryGoGraphQLJavaScriptJenkinsNode.jsTypeScript

About the role

Key responsibilities & impact

Architect, design, and own the end-to-end development of ZoomInfo's customer-facing GraphQL APIs, ensuring high availability, low latency, and developer-friendly experiences.
Define schema design standards, versioning, deprecation, and backward-compatible evolution across product surfaces.
Work with product managers and data engineers to expose ZoomInfo's GTM data assets (BigTable, BigQuery, Solr) through well-structured, queryable API surfaces.
Implement and enforce API security, OAuth 2.0, JWT, RBAC, rate limiting, and query complexity controls.
Maintain production reliability through CI/CD pipelines (Jenkins, ArgoCD) and observability practices using Datadog.
Use AI tooling (Claude, GitHub Copilot) as part of your daily workflow and help the team do the same responsibly.
Lead code and design reviews, mentor senior engineers, and contribute to the engineering roadmap.

Requirements

What you’ll need

8+ years of software engineering experience, with a focus on production-grade, customer-facing APIs at scale.
Prior experience owning a developer-facing API platform at a SaaS or data company.
Bachelor's or advanced degree in Computer Science, Engineering, or a related field.
Deep GraphQL expertise: schema design, resolvers, federation, subscriptions, and performance optimization.
Strong Node.js and TypeScript skills for API services and developer tooling; Go experience for backend and infrastructure work.
Experience securing customer-facing APIs, OAuth 2.0, JWT, fine-grained authorization, rate limiting.
Familiarity with large-scale data systems; exposure to BigTable, BigQuery, or Solr is a plus.
Experience building developer-facing SDKs or API tooling. You think about the API consumer, not just the implementation.
Familiarity with AI coding tools (Claude, GitHub Copilot); experience with AI Agents or MCP tooling is a bonus.
Clear communicator who can drive technical decisions and bring along both engineering and non-engineering stakeholders.

Benefits

Comp & perks

comprehensive benefits
holistic mind, body and lifestyle programs designed for overall well-being

ATS Keywords

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Applicant Tracking System Keywords

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Hard Skills & Tools

GraphQLNode.jsTypeScriptGoAPI securityOAuth 2.0JWTrate limitingCI/CDschema design

Soft Skills

clear communicationmentorshiptechnical decision-makingcollaboration

Certifications

Bachelor's degree in Computer Scienceadvanced degree in Engineering