Senior Staff Applications Development Engineer

Company DescriptionIt 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.Job DescriptionWe 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 issuesQualificationsTo 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 sandboxing), and semantics, reverse proxying, and designing for concurrent versioned rollouts Comfortable working across a JVM/Maven backend (Java, ServiceNow Glide platform conventions) in addition to a Node/TypeScript SSR stack Demonstrated experience as a technical lead, Staff Engineer, or equivalent senior individual contributor responsible for architecture, technical direction, code quality, and mentoring Track record designing framework-level abstractions (component base classes, context/DI systems, event contracts) consumed by many other engineering teams Ability to make pragmatic architecture decisions across performance, reliability, security, maintainability, and delivery speed Demonstrated capability to manage multiple projects with material technical risk across teams and processes Track record serving as functional lead or technical owner Exposure to multiple technology stacks: Cloud Dev, Platforms, Web Dev, Frameworks, service-oriented architecture Experience designing and architecting modular, reusable component systems Preferred — AIUX Framework specific Experience with build systems that emit multiple targets from one component source (server bundles vs. code-split browser bundles) Hands-on experience operating services in Kubernetes: deployment configuration, scaling, rollout/rollback, and incident response Experience building and maintaining observability tooling (Grafana dashboards, Prometheus alerting) for production systems FD21For positions in this location, we offer a base pay of $190,900 - $334,100, plus equity (when applicable), variable/incentive compensation and benefits. Sales positions generally offer a competitive On Target Earnings (OTE) incentive compensation structure. Please note that the base pay shown is a guideline, and individual total compensation will vary based on factors such as qualifications, skill level, competencies, and work location. We also offer health plans, including flexible spending accounts, a 401(k) Plan with company match, ESPP, matching donations, a flexible time away plan and family leave programs. Compensation is based on the geographic location in which the role is located and is subject to change based on work location.Additional InformationWork PersonasWe approach our distributed world of work with flexibility and trust. Work personas (flexible, remote, or required in office) are categories that are assigned to ServiceNow employees depending on the nature of their work and their assigned work location. Learn more here. To determine eligibility for a work persona, ServiceNow may confirm the distance between your primary residence and the closest ServiceNow office using a third-party service.Equal Opportunity EmployerServiceNow is an equal opportunity employer. All qualified applicants will receive consideration for employment without regard to race, color, religion, sex, sexual orientation, national origin, age, disability, gender identity, veteran status, or any other category protected by law. In addition, all qualified applicants with arrest or conviction records will be considered for employment in accordance with legal requirements.  AccommodationsWe strive to create an accessible and inclusive experience for all candidates. If you require a reasonable accommodation to complete any part of the application process, or are unable to use this online application and need an alternative method to apply, please contact View email address on click.appcast.io for assistance. Export Control RegulationsFor positions requiring access to controlled technology subject to export control regulations, including the U.S. Export Administration Regulations (EAR), ServiceNow may be required to obtain export control approval from government authorities for certain individuals. All employment is contingent upon ServiceNow obtaining any export license or other approval that may be required by relevant export control authorities. From Fortune. 2026 Fortune Media IP Limited. All rights reserved. Used under license.SummaryType: Full-timeFunction: EngineeringExperience level: Not ApplicableIndustry: Information Technology And Services