Brave

AI Security Researcher/Research Engineer

North America, EU, United Kingdom · Work style not stated

Apply on the employer’s site ↗See how well you match this job

You apply directly with the employer. ROLIVA does not submit applications from this page and is not the employer.

About the role

Description from the employer’s posting. Check the employer’s page for the current version.

EmployerBrave
LocationNorth America, EU, United Kingdom
Work styleWork style not stated
Employer posted1 month ago

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.

Show full description

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.

See how well you match this job Apply on the employer’s site ↗

Check your resume against this job Free, no sign-up. Nothing you paste is stored.

Staying safe while you apply

Never pay to apply, interview or accept an offer. ROLIVA never asks you for payment to apply to a job.
Apply only through the official “Apply on the employer’s site” button, on the employer’s own site, and check that a recruiter’s email uses that employer’s own domain rather than a free email address.
Be cautious of an offer made with no real interview, or pressure to decide quickly or share financial details early.

Does something look wrong with this listing? Use “Report broken link” in the role details, or read ROLIVA’s full job-safety guidance ↗.

Preparing for this role with ROLIVA

Check the fit.
Compare the requirements with the experience you have confirmed, including gaps.
Prepare honestly.
Build interview stories and application drafts from your own evidence.
Keep track.
Save the role and record your own application status and follow-ups.

Create a free workspace or log in.