Staff Software Engineer, OfficeJS

Harvey

Staff Software Engineer developing the Office Add-in within Microsoft Word, enabling AI-powered editing for legal professionals. Leading technical direction and collaborating with various teams to shape the feature set.

Posted 6/26/2026full-timeNew York City • New York • 🇺🇸 United StatesLead💰 $231,000 - $340,000 per yearWebsite

Tech Stack

Tools & technologies

JavaScriptReactTypeScript

About the role

Key responsibilities & impact

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

Requirements

What you’ll need

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

Benefits

Comp & perks

Comprehensive health, dental and vision coverage
Retirement benefits (401k match up to 4%)
Flexible PTO
Offers Equity
Offers Bonus

ATS Keywords

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Applicant Tracking System Keywords

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Hard Skills & Tools

OfficeJSJavaScriptTypeScriptHTMLCSSReactdocument manipulationAI-assisted draftingerror handlingcross-platform compatibility

Soft Skills

mentoringtechnical decision-makingcollaborationattention to detail