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# Sr/Staff Fullstack Engineer (Node, React, RAG) - Perm - Relocation to SF

- **Company:** Arc Full-time
- **Location:** San Francisco, CA, United States (Remote available)
- **Experience:** Expert
- **Salary:** $245,000.0
- **Contract:** Permanent contract
- **Skills:** Microsoft Word, Artificial Intelligence, Cluster Analysis, Databases, Node.Js, WordPress, ReactJS, Retrieval-Augmented Generation, Large Language Models, Virtual Agents, Software Coding
- **Published:** October 9, 2026
- **Apply:** https://arc.dev/signup?userType=developer&publicRandomKey=pq2t5cy5jz&to=https%3A%2F%2Farc.dev%2Fdashboard%2Fd%2Fverified-jobs%2Fpq2t5cy5jz%2Fapplication

## About the Role

* You love writing code, but you love having impact more: We're a team of engineers at heart, but our #1 goal is building the best possible product. That means making pragmatic choices and looking for 80/20 solutions.
 * Would describe yourself as being relentlessly resourceful.
 * You have a strong internal sense of urgency. You have a bias towards doing things today, rather than tomorrow.
 * Experience working in a startup environment is preferred but not required.
 * Are excited about the adventure of building a company

## Description

Every civilization runs on the same infrastructure: agreements between people who don't fully trust each other. Sumerians pressed them into clay. Romans carved them into stone. We bury them in 80-page PDFs.

The way those agreements are reviewed hasn't changed in four thousand years - a human reads the whole thing and tries not to miss anything. We're building the AI that finally changes that.

We launched in early access in 2023. Since then, we've had an incredible response from the market and are growing rapidly. We 6x'd in ARR in the last 12 months. Our clients include companies like Uber, Reddit, IBM, Canva, Pinterest, WordPress, and more. We're happy to share more details with candidates who go through our interview process. We recently raised our Series B and have grown 800% over the last 12 months.

Engineering with Us

Engineers here are inventors. We were first-to-market with:

 * An AI agent that lives in MS word and edits the document for you [2023]
 * Ditching imprecise embeddings models in favor of agentic RAG [2023]
 * Large-scale LLM-based legal fact extraction [2024]
 * A legal assistant that can search large contract databases, without sacrificing accuracy [2024]
 * Clustering legal documents descended from the same family [2025]
 * Automatic deviation analysis to locate buried risk in huge contract databases [2025]
 * Merging contracts with their amendments to make a time series of "composite" contracts (a customer actually cried when we showed her this) [2025]