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# Staff Software Engineer, OfficeJS

- **Company:** Harvey, Inc.
- **Location:** New York, NY, United States
- **Experience:** Expert
- **Salary:** $231,000.0 - $340,000.0
- **Contract:** Permanent contract
- **Skills:** Microsoft Word, Microsoft Windows, Application Programming Interfaces (APIs), Artificial Intelligence, Microsoft Outlook, Microsoft Office, Microsoft SharePoint, Software Engineering, Systems Integration, Management of Software Versions, ReactJS, Large Language Models, Build Management
- **Published:** October 4, 2026
- **Apply:** https://www.careerboard.com/us/en/find-jobs-in-United-States/-ACF44B3B2427D27A37/

## About the Role

As a Staff Software Engineer on the Embedded Experiences team, you will own and lead the development of Harvey in Word, our Microsoft Office Add-in built on OfficeJS, alongside our other Microsoft Office integrations. You'll architect and ship features that integrate seamlessly with Word, handling the unique challenges of building performant, polished experiences within the Office Add-in environment.

We're looking for someone with deep expertise in OfficeJS and Office Add-in development, ideally from building a similar product at scale. You'll join a team of highly motivated, skilled engineers who hold everything they touch to the highest standards, from architecture to code to user experience. You may also contribute to our Outlook integration and help build the next generation of agentic AI interfaces across the Microsoft suite.

This role is based in New York, NY. We use a hybrid in-person work model and offer relocation assistance to new employees.
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 Back End 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

Deep understanding of Office Add-in architecture, requirement sets, manifest configuration, and cross-platform considerations

Experience with React or similar modern Front End 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
Compensation Range