Staff Software Engineer, OfficeJS

At Harvey were transforming how legal and professional services operate. By combining frontier agentic AI an enterprise-grade platform and deep domain expertise were reshaping how critical knowledge work gets done for decades to come.

This is a rare chance to help build a generational company at a true inflection point. With 1500 customers in 60 countries strong product-market fit and world-class investor support were scaling fast and defining a new category in real time. The work is ambitious the bar is high and the opportunity for growth personal professional and financial is unmatched.

Our team moves fast takes ownership and is deeply committed to the mission operating with intensity staying close to our customers and pushing each other for excellence. We live by three values: Decisiveness Simplicity and Jobs Not Finished. We act quickly on clear judgment over perfect information we believe simplicity is what scales and were never satisfied with where we are. If you want to do the best work of your career alongside people who share that drive wed love to build with you.

At Harvey the future of professional services is being written today and were just getting started.

Legal professionals spend most of their day in Microsoft Word: drafting reviewing and refining complex documents that shape meaningful outcomes. Harvey in Word brings AI-powered capabilities directly into Word enabling lawyers to draft faster run playbook reviews and perform agentic editing all without leaving their workflow. Its one of our most strategic product lines and a key part of how we meet lawyers where they already work.

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. Youll architect and ship features that integrate seamlessly with Word handling the unique challenges of building performant polished experiences within the Office Add-in environment.

Were looking for someone with deep expertise in OfficeJS and Office Add-in development ideally from building a similar product at scale. Youll 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.

• 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

• 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

• 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

$231000 - $340000

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Harvey is an equal opportunity employer and does not discriminate on the basis of race gender sexual orientation gender identity/expression national origin disability age genetic information veteran status marital status pregnancy or related condition or any other basis protected by law.

We are committed to providing reasonable accommodations to applicants with disabilities and requests can be made by emailing

Required Experience:

Staff IC