AI Systems Researcher/Engineer

brave; United States; Hybrid; USD 112,000 - 152,000; Full time

Job summary

Brave is hiring an AI Systems Researcher / Research Engineer to shape performance evaluations and optimizations across Brave’s desktop and mobile products.

You’ll work on browser ML models, on-device AI agents, and collaborate closely with privacy and security researchers to reduce AI risks while delivering high-value commercial outcomes.

Qualifications

• Experience in AI systems research and performance evaluation.
• Strong background in ML model optimization for on-device performance.
• Familiar with modern ML frameworks and security/privacy considerations.

Responsibilities

• Shaping and improving performance evaluations across desktop and mobile.
• Collaborating with privacy and security researchers to mitigate AI risks.
• Developing and validating browser ML models and on-device AI agents.
• Contributing to open-source projects related to systems optimization.

Skills

Python

C++

JavaScript

Rust

ML frameworks

Education

Ph.D. preferred

Tools

PyTorch

TensorFlow

ONNX Runtime

Core ML

Job description

AI Systems Researcher / Research Engineer

UK: London (Preferred) - Hybrid

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

Join us at Brave as we redefine the future of online experiences with a range of cutting-edge, top-performing products. We’re seeking an experienced AI Systems and Performance Researcher/Engineer to shape and improve our performance evaluations and optimizations across desktop and mobile. If you’re passionate about innovation, privacy, and delivering impactful AI solutions, this is your opportunity to make a difference. We need you to help with a wide range of key products, ranging from our browser ML models, novel applications, on-device AI agents, performance evaluations, and collaborating closely with privacy and security researchers to protect the users from AI risks.

About you

• Demonstrates a high level of initiative and consistently delivers high-quality solutions
• Has an enquiring mind and a disciplined scientific approach to extracting facts and understanding observed behavior
• Is excited by the potential of realizing high-value commercial outcomes and change the way that the advertising business operates
• Want to be part of a high-growth startup company with global ambitions
• Experience with software development practices (Python, C++, JavaScript and/or Rust)
• Has a proven track record implementing data driven products and a broad understanding of the state of the art in systems and networks
• Comfortable working in an open-source setting
• Able to create and deploy mobile/desktop applications and systems
• Has a passion for helping protect users’ privacy and security
• A Ph.D. in computer science is highly preferred, but we may consider some exceptions with industry experience

Specific Skills

• Background and/or previous work in AI systems research and performance evaluation.
• Expertise in optimizing and evaluating ML models and/or privacy & security technologies for on-device performance.
• Experience with modern Machine Learning (ML) frameworks (e.g., Pytorch, TensorFlow, MLX, ONNX Runtime, Core ML, TensorRT, etc.).

Skills That Will Set You Apart from the Competition

• ML Systems (pipelines, performance evaluation, etc.)
• Open source projects on mobile/desktop systems optimization
• Experience with confidential computing and security/privacy 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.