About this role
Build and evolve server-driven UI services and shared component libraries for PENN Entertainment's gaming and sports betting platforms. Design GraphQL schemas in a federated architecture, optimize React/TypeScript frontends, and improve developer experience across a large monorepo.
Must have
At least 5 years of experience in software engineering
Strong JavaScript, TypeScript, and React skills with UX instincts
2+ years designing and evolving GraphQL schemas for multi-client product surfaces
Fluency with HTML, CSS, and browser environment including DOM and platform APIs
Solid foundation in computer science with data structures and algorithms
Experience with production systems at scale including load testing and tracing
Experience investigating and fixing production performance regressions
Experience on on-call rotation and owning release cycles end to end
Experience with API development in Node, Bun, or similar server frameworks
Experience building multi-client or white-label platforms
Experience with Kubernetes and operating services in containers
Comfortable with terminal, Git, GitHub, and modern editors
Experience with testing frameworks Jest, Vitest, or equivalent
Technologies
Responsibilities
Design and evolve GraphQL schemas in a federated graph for server-driven UI
Classify breaking changes and coordinate migrations with mobile and web leads
Develop, scale, and optimize GraphQL APIs, RPC endpoints, and SQL queries
Build front-end applications and shared libraries with React and TypeScript
Build fast and accessible web applications for all users
Partner with product and design to architect and ship customer-facing features
Use observability tooling to diagnose issues and improve guest experience
Set up and refine monitoring and alerting in DataDog for owned systems
Find technical debt, propose fixes, and hold quality standards for the team
Identify bottlenecks and risks in production and drive platform scaling changes
Mentor teammates through code review, pairing, and documentation
Participate in collaborative agile design, architecture, and delivery
Write thorough tests for every feature and bug fix
Work with QA to strengthen automated testing pipelines and CI/CD workflows
Use Claude Code in daily development to accelerate work without lowering quality
Benefits
Amenities
Recruitment process
Team owns shared component libraries, design system, and build/release tooling
Work spans monorepo developer experience and server-driven UI GraphQL service
Role involves genuine mix of front-end and backend GraphQL work
Testing is treated as a first-class discipline on this team
Education and conference reimbursements available
Opportunities for career progression and mentoring others
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