Senior/Staff Software Engineer, OfficeJS
Lead development of Harvey in Word, an AI-powered Microsoft Office Add-in using OfficeJS. Architect integrations, build agentic editing features, and mentor engineers.
Senior/Staff Software Engineer, OfficeJS
Lead development of Harvey in Word, an AI-powered Microsoft Office Add-in using OfficeJS. Architect integrations, build agentic editing features, and mentor engineers. Requires deep OfficeJS expertise and 5+ years experience.
231k – 340kNew York, NYFrontend EngineeringHybrid5+ YOE
About the role
What You'll Do
- Own and lead the technical direction of Harvey in Word, our flagship Office Add-in product, alongside our other Microsoft Office integrations.
- Build the AI-native editing experience: agentic document rewrites, real-time redlining, and playbook automation that transforms how lawyers work.
- Design and build sophisticated integrations with Microsoft Word using the OfficeJS API, including document manipulation, playbook reviews, and AI-assisted drafting.
- Architect scalable, maintainable solutions that handle the constraints and quirks of the Office Add-in environment across platforms (Windows, Mac, Web).
- Build polished, high-performance interfaces with crisp interactions and resilient error handling.
- Collaborate with product, design, and backend teams to shape APIs and UX for AI-powered features like streaming results and tool-calling workflows.
- Navigate Office Add-in requirement sets, versioning, and cross-platform compatibility to ensure broad, reliable support.
- Contribute to Harvey in Outlook and shape the next generation of agentic AI interfaces across the Microsoft suite.
- Mentor engineers, drive technical decisions, and raise the bar on quality and developer experience.
What You Have
- 5+ years of software engineering experience, with significant depth in Office Add-in development using OfficeJS.
- Experience building and shipping a production Office Add-in product, ideally one used at enterprise scale.
- Strong proficiency in JavaScript/TypeScript, HTML, and CSS.
- Deep understanding of Office Add-in architecture, requirement sets, manifest configuration, and cross-platform considerations.
- Experience with React or similar modern frontend frameworks.
- Track record of shipping highly intuitive products with strong attention to detail.
- Familiarity with Microsoft Office Add-in guidelines and AppSource submission process is a plus.
Nice to Have
- Experience with Outlook Add-ins or other Microsoft 365 integrations (SharePoint, Teams).
- Background in legal tech or enterprise SaaS.
- Experience building products that integrate with AI/LLM capabilities.
Skills
OfficejsJavaScriptTypeScriptHTMLCSSReactMicrosoft Office Add-InsOutlook Add-InsMicrosoft 365
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