---
title: 'AI Security Researcher/Research Engineer at Brave'
canonical: 'https://feeny.ai/job/ai-security-researcher-research-engineer-brave-north-america-eu-jxga2zrk8v49'
type: 'job'
last_seen: '2026-09-14'
---

# AI Security Researcher/Research Engineer at Brave

- **Company:** Brave
- **Location:** North America EU, United Kingdom
- **Posted:** 2026-08-29
- **Last confirmed live:** 2026-09-14
- **Apply:** https://job-boards.greenhouse.io/brave/jobs/8165845

## Job description

AI Security Researcher / Research Engineer

Remote or hybrid - London preferred but North America, EU, UK accepted

About Brave:

Brave is on a mission to protect the human right to privacy online. We’ve built a free web browser that blocks creepy ads and trackers by default, a private search engine with a truly independent index, private AI assistant, latest privacy and security features, and a private ad network (opt-in!) that directly rewards you for your attention. Already over 120 million people regularly use Brave for a faster, more private web. Millions more switch every month.

The internet is a sea of ads, hackers, and echo chambers. Big Tech makes huge profits off our data, and tells us what’s true and what’s not. Brave is fighting back. Join us!

Summary

We are looking for a researcher/research engineer to help mitigate the security risks that come with building AI systems-especially LLM-powered web agents and chatbots. In this role, you'll design and implement secure-by-design architectures, audit our LLM-powered web agent (https://brave.com/blog/ai-browsing/) and chatbot, and help set Brave's direction on how we identify, measure, and reduce security risk across AI products.

## Responsibilities

- Design and execute adversarial evaluations to uncover failure modes in LLM-powered web agents and chatbots (e.g., prompt injection, tool abuse, data exfiltration)
- Analyze model behavior (including internal thoughts) to understand and forecast security risks in frontier models
- Develop and prototype security-focused training and fine-tuning techniques
- Augment web agents with security principles including information flow control, privilege control and contextual security
- Partner with engineers and (privacy, ML, and Cryptographic) researchers to translate findings into product changes, tests, and measurable security improvements
- Help define a forward-looking security strategy and policy for building and responsibly releasing web agents—advocating for user protection

You may be a good fit if you have

- Demonstrated experience working on Secure AI (prompt injection attacks and security guardrails)
- Strong publication record in AI security, ML security, or closely related areas
- A track record of shipping products and features inside a fast-moving environment
- Strong coding skills in Python and familiarity with ML frameworks like PyTorch or JAX
- Experience training, fine-tuning, and evaluating large language models
- Deep familiarity with large language models and web agents, how they work, and how they are trained
- Experience applying security principles (e.g., information flow control, access control/least privilege)
- Demonstrated success in bringing clarity and ownership to ambiguous technical problems
- A Ph.D. in computer science is highly preferred, but we may consider some exceptions with industry experience

Skills That Will Set You Apart from the Competition

- Knowledge of AI Systems (pipelines, security evaluation, etc.)
- Open source projects on security/privacy
- Experience with confidential computing and ZKP/SMPC protocols
- Ph.D. in computer science from a top-tier school
- A strong publication record in premier systems, performance, or ML
- Work experience in industry is desirable

Working at Brave - What we offer

- Ability to work at an exciting and well-funded international startup headquartered in San Francisco
- Cutting-edge technology, allowing you to work with state-of-the-art tools and software solutions
- Competitive compensation and plenty of room for personal growth
- Great international exposure and team atmosphere

We are looking to hire in London but would consider an exceptional candidate in the rest of Europe.

NO AGENCIES or RECRUITERS PLEASE - Unfortunately, we cannot work with third parties on these searches.

## About Brave

## Company Overview
- **One-liner**: Brave develops a privacy-first web browser and independent search engine that blocks ads and trackers by default, while offering a suite of tools including AI, VPN, crypto wallet, and an advertising platform.
- **Entity Type**: Private (funding details not publicly disclosed)
- **Headquarters**: San Francisco, California, USA (with an additional office in London, UK)
- **Founded**: 2015
- **Founders**: Brendan Eich (creator of JavaScript, co-founder of Mozilla) and Brian Bondy (formerly of Khan Academy and Mozilla)

## Core Business
- **Primary industry**: Internet software – privacy-focused browser, search engine, and advertising.
- **Target customers**: B2C (consumers seeking private browsing) and B2B (advertisers through Brave Ads, developers via the Brave Search API).
- **Mission**: “To build a user-first Web” – countering Big Tech’s data exploitation by giving users privacy, speed, and independence.

## Products & Services
- **Brave Browser**: A Chromium-based desktop and mobile browser that blocks invasive ads, trackers, cross-site cookies, fingerprinting, and more by default. Available on Android, iOS, Linux, macOS, and Windows.
- **Brave Search**: An independent search engine powered by its own web index – one of only three global-scale indexes outside of Big Tech. Includes AI-powered answers (Summarizer) and a conversational interface (Ask Brave).
- **Brave Search API**: A publicly available API that provides real-time, independent search data for AI applications and other search tools. Used by Cohere, Mistral, Perplexity, You.com, and others.
- **Brave Ads**: A private advertising network that offers high ROI for advertisers while respecting user privacy. Users can opt in to view ads and earn Basic Attention Token (BAT).
- **Brave Leo**: An AI assistant built directly into the browser. Can answer questions, summarize pages, generate content, translate, write code, and more. Supports multiple models including Anthropic’s Claude and Meta’s Llama.
- **Brave Wallet**: A browser-native, multi-chain crypto wallet for NFTs, DApps, and DeFi, with low fiat-to-crypto fees.
- **Brave VPN**: A secure, built-in VPN that hides IP address and masks location.
- **Brave Talk**: Browser-based encrypted video calling (peer-to-peer).
- **Brave Rewards / BAT**: Users earn Basic Attention Tokens for viewing privacy-respecting ads, and can use them to support content creators.

## Market Standing
- **Valuation/Market Cap**: Not publicly disclosed.
- **Key Metric**: Over 100 million monthly active users (MAU) worldwide, 42 million daily active users (DAU), and 1.6+ billion queries per month as of early 2025.
- **Notable Investors/Partners**: Partnerships include AI companies like Cohere, Mistral, Perplexity, and You.com (via Search API). Other partners are not detailed in public materials; press contacts available for inquiries.
- **Growth Signals**: Surpassed 100M MAU in 2025; Search API usage growing at an exponential rate; continuous expansion of language support (50+ for browser, 40+ for Search); new AI features (Leo, Summarizer) driving adoption.

## Competitive Advantages
- **Independent search index**: Brave Search is the only global-scale search engine not influenced by Google or Microsoft.
- **Privacy-by-default**: Unlike other browsers, Brave blocks ads, trackers, and fingerprinting out of the box – no extensions needed.
- **Integrated AI**: Leo offers a private, account-free AI assistant directly in the browser, with no data retention for model training.
- **Token ecosystem**: BAT and Brave Rewards create a unique economic model that directly compensates users and content creators.
- **Multi-product suite**: Browser, search, VPN, wallet, video calls – all in one app with a consistent privacy focus.

## Strategic Focus
- **Growing the Search API**: Making Brave’s independent index available to AI and search applications at competitive pricing.
- **Advancing AI capabilities**: Expanding Leo’s models and features (e.g., memory, temporary chats, language support) while maintaining privacy.
- **Increasing user base**: Continuing to grow beyond 100M MAU through word-of-mouth, partnerships, and default search settings.
- **Monetizing without compromising privacy**: Scaling Brave Ads and premium offerings (Brave Premium, VPN) while keeping core products free.

## Why Work Here
- **Culture & mission**: Employees are driven by the mission to fix the internet’s privacy problems and take on Big Tech.
- **Remote & hybrid options**: Many roles are fully remote (US and global), with hybrid options for London and San Francisco offices. Some positions (e.g., Workplace Operations Coordinator in London) require in-office presence.
- **Engineering excellence**: Described as a “world-class engineering, security, and research team” – notable for working on cutting-edge browser internals, AI, and blockchain/crypto.
- **Diversity & inclusion**: Brave is an equal opportunity employer that values diversity and does not discriminate.
- **Global team**: Employees work from around the world; offices in San Francisco and London.
- **Typical perks**: Not explicitly listed, but the company offers a modern tech stack, opportunities to work on open-source (Chromium), and the chance to shape the future of the web.

## Sources
1. [brave.com/about](https://brave.com/about/)
2. [brave.com/careers](https://brave.com/careers/)
3. [brave.com](https://brave.com/)
4. [linkedin.com/company/brave-software](https://www.linkedin.com/company/brave-software)
5. [builtin.com/company/brave](https://builtin.com/company/brave)

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