Member of Technical Staff, Microsoft Office Integrations

GC AI; California (MO); On-site; USD 165,000 - 350,000; Full time

Job summary

GC AI is building the future of legal AI. In this role you’ll own the Microsoft Word Add-in experience, helping in-house lawyers surgically redline contracts, draft clauses on the fly, and spot risks without leaving Word.

You’ll work with our founding team and top engineers to ship fast, reliable features that feel native to the legal workflow, with ownership, urgency, and real impact from day one. GC AI is distributed across North America, with plans to expand.

Qualifications

• 5+ years building production software with editor or rich-client focus.
• Strong TypeScript and React expertise.
• Experience with Microsoft Office Add-ins or similar embedded apps.
• Deep understanding of real-time collaboration and document manipulation.
• Track record of shipping polished, user-facing features.

Responsibilities

• Build and refine the Microsoft Word Add-in.
• Improve latency, reliability, and micro-interactions.
• Architect the bridge between AI backend and Word document model.
• Ship features like playbook-driven reviews and clause libraries.
• Collaborate with the AI team to integrate model outputs into the legal workflow.

Skills

TypeScript

React

Office Add-ins

Real-time collaboration

Editor experiences

Ship features

Tools

Office.js

Microsoft Graph API

VS Code extensions

Job description

GC AI is the fastest-growing and most trusted legal AI platform for in‑house legal teams. We're building the future of legal work, and we're doing it fast. You'll join at a pivotal moment—when decisions matter, impact is immediate, and the runway to shape your career is wide open. We’re a high-performing team where you'll have real ownership and influence from day one. More than 1,800 companies use GC AI to drive their business forward, including 150+ public companies, 25+ unicorns, and brands such as News Corp, Miro, Bass Pro Shops, Snyk, Skims, Liquid Death, Vercel, Zscaler, and TIME. We've 10x'd revenue in 12 months, raised a $60 million Series B ($555 million valuation), and are growing faster than ever. We are backed by incredible investors, including Scale Venture Partners, Northzone, Sound Ventures, and Guillermo Rauch, CEO of Vercel. If you thrive when the stakes are high and the path isn't paved, you'll love it here. Our six guiding principles are: 1% better every day, customer obsession, ship today, find a way, care deeply, and own it completely. Come shape the future of legal work with us.

About The Role

As part of our Microsoft Office Integrations team, you'll be at the center of the most ambitious product in legal AI: GC AI for Word, the AI copilot that lives where lawyers actually work. You'll be crafting the experience that lets in‑house legal teams surgically redline contracts, draft clauses on the fly, and spot risks in seconds, all without leaving Microsoft Word. You'll work directly with our founding team (including a 3x General Counsel who knows exactly what lawyers need) and a tight group of exceptional engineers to ship features that make lawyers say "Wow, this is magic."

Why This Role Matters

The legal AI space is exploding, and we're in pole position. We’ve raised $60M at a $555M valuation because we've built something lawyers actually love. Now we need an engineer who can help us pull even further ahead. You'll own the surface area where AI meets the document. Every redline, every clause suggestion, every risk flag, that's your canvas. The decisions you make will directly shape how thousands of lawyers experience AI in their daily work.

What You'll Do

• Build and refine our Microsoft Word Add‑in
• Obsess over latency, reliability, and the micro‑interactions that make the difference between "useful tool" and "can't live without it."
• Architect the bridge between our AI backend and the Word document model, handling everything from tracked changes to comment threads
• Ship features like playbook‑driven reviews, clause libraries, and contextual drafting that outpace the competition
• Collaborate with our AI team to integrate model outputs in ways that feel native to the legal workflow

Impact You'll Have

• Define the UX patterns for AI‑assisted contract work that the entire industry will follow
• Build the product that turns hour‑long contract reviews into 10‑minute workflows
• Ship features that directly drive enterprise adoption and make IT teams say "yes" faster
• Help further GC AI’s position as the undisputed leader in legal AI for in‑house teams

Required Experience

• 5+ years building production software, ideally with a focus on rich client applications or editor experiences
• Strong expertise in TypeScript and React
• Experience with Microsoft Office Add‑ins, VS Code extensions, or similar embedded application development
• Deep understanding of real‑time collaboration patterns and document manipulation
• Track record of shipping polished, user‑facing features that people actually love

Nice To Have

• Experience with Office.js or the Microsoft Graph API
• Background in legal tech, document automation, or CLM platforms
• Familiarity with LLM integration patterns and streaming responses
• You've used Cursor, Copilot, or similar AI coding tools and have opinions about what makes them great

A Note On Pace

We’re building something new in a once‑in‑a‑generation shift in technology and the legal industry, so we move at a relentless pace. We expect urgency, ownership, and good judgment even when things aren’t perfectly clear. If you need structure and consensus to do your best work, this isn’t the right place for you. If you thrive in ambiguity and growth, work with intensity, and want real responsibility, keep reading. We’re excited to meet you.

How We Work Together

GC AI is a distributed company with team members across North America, and soon Europe. We believe that because our business is AI, human connection matters more, not less. We invest in bringing people together through our hub model: regular coworking sessions, customer dinners, team and company offsites. If you’re in a location without an office, expect up to 10% travel (and more for customer‑facing roles). Team members in the San Francisco Bay Area and Provo, UT (within 50 miles of the office) work together on Tuesdays, Wednesdays, and Thursdays. As we grow, we plan to establish permanent offices in more hub cities, and we will look to our team members to help build that in‑person culture. We currently hire across the United States and Canada.

Equal Opportunity Employment

GC AI is an equal opportunity employer that supports workplace diversity and does not discriminate on the basis of race, color, religion, gender identity/expression, national origin, age, military service eligibility, veteran status, sexual orientation, marital status, physical or mental disability, or any other protected class. GC AI is committed to working with and providing reasonable accommodation to applicants with physical and mental disabilities.

Compensation Range: $165K - $350K