Senior Staff Applications Development Engineer

It all started when engineer Fred Luddy wrote code that automated a tedious task for his coworker, Phyllis. She cried tears of joy. That moment inspired Fred to build a company that could do that for everyone—freeing people from busywork so they could focus on meaningful work. Today, ServiceNow is the AI control tower for business reinvention. Our ServiceNow AI platform brings together any AI, any data, and any workflow— helping 85% of the Fortune 500® work smarter, faster, and better. We're building an AI-native culture where technology and talent are unstoppable together. And we're just getting started. Join us to put AI to work for people.

We are the AI Experience Framework (AIUX) team that builds the platform that powers ServiceNow's AI-first user interfaces. Using modern Lit-based web components, AIUX builds modular, reusable conversational experiences that serve as the technical foundation for conversation-first applications like Employee Slate. This role owns full-stack architectural decisions in a modern JavaScript/component-driven environment, working across AI integration, performance scale, and multi-team coordination — spanning our SSR runtime (server-rendered Lit components, versioned request routing, isolated execution pools) and the ServiceNow Glide platform layer it integrates with. What you get to do in this role:    Own code from design, implementation, test automation, and delivery of high-quality product to our users Work with product owners to understand detailed requirements and drive the full development lifecycle Build software that is simple to use, allowing customers to extend and customize functionality to meet their specific needs Contribute to the design and implementation of new products and features while enhancing the existing product suite Mentor colleagues and promote knowledge-sharing across teams Apply advanced knowledge of data structures, algorithms, OO design, design patterns, and performance/scale considerations Raise the engineering bar through architecture reviews, code reviews, mentoring, and technical direction Architect modular, reusable component systems for scalability and extensibility Own architecture across the request path — proxy, version-aware routing, server-rendered component runtime, and the ServiceNow platform services it calls into Set technical direction for framework-level APIs (context propagation, layout composition, state management) consumed by every downstream component team Represent AIUX Framework in cross-org architecture decisions and act as an escalation point for the hardest production issues Qualifications To be successful in this role you have: Experience in leveraging or critically thinking about how to integrate AI into work processes, decision-making, or problem-solving. This may include using AI-powered tools, automating workflows, analyzing AI-driven insights, or exploring AI's potential impact on the function or industry. 10+ years of professional software engineering experience, with deep expertise in JavaScript and substantial experience in Java or a similar OO language (C++, C#, Go acceptable) Passion for JavaScript and the Web as a platform, reusability, and componentization Advanced experience with modern UI frameworks: Angular, React, Vue, or Lit Advanced knowledge of data structures, algorithms, object-oriented design, design patterns, and performance/scale considerations Advanced knowledge and experience with relational databases: development, troubleshooting, and performance optimization Deep expertise in server-side rendering and hydration, including the failure modes specific to isomorphic rendering (markup mismatches, browser-API leakage into server code) Strong systems-level Node.js experience: process/worker isolation (V8 isolates or equivalent