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Senior/Staff Software Engineer, OfficeJS

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Harvey

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Location:
United States , San Francisco

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Contract Type:
Not provided

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Salary:

200000.00 - 312000.00 USD / Year

Job Description:

At Harvey, we’re transforming how legal and professional services operate — not incrementally, but end-to-end. By combining frontier agentic AI, an enterprise-grade platform, and deep domain expertise, we’re reshaping how critical knowledge work gets done for decades to come. 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. It's one of our most strategic product lines and a key part of how we meet lawyers where they already work.

Job Responsibility:

  • 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:

  • 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
What we offer:
  • Offers Equity
  • Offers Bonus
  • Comprehensive health, dental and vision coverage
  • retirement benefits (401k match up to 4%)
  • flexible PTO

Additional Information:

Job Posted:
February 18, 2026

Employment Type:
Fulltime
Work Type:
Hybrid work
Job Link Share:

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