As a Software Engineer, Communications Safety, you'll build the chat and communication systems that let people and creators express themselves better than in real life, and keep them safe at scale. You'll ship the real-time detection systems that help scale and protect billions of messages across 2D and 3D spaces and stay ahead of bad actors trying to evade our safety measures, so expression and trust go hand in hand.

You will work with various teams (Game Engine, Safety, ML platform) and products including backend services working at high scale, data pipelines, ML models, and tools to strengthen underlying chat and policy infrastructure to support reliability, safety, and flexibility, while enabling new communication products. You'll also have the opportunity to make direct contributions to core communication Roblox products, ensuring safety is woven into the foundation of the platform itself.

If you are a developer with an understanding of large scale systems and want to shape how the next generation of Roblox users interact safely in the metaverse, you’ll be right at home within our highly-skilled and rapidly growing team.

You will:

• Engineer and scale next-generation infrastructure to accommodate our rapidly expanding user base, maintaining systems capable of supporting millions of concurrent users. You will architect highly reliable safety services, leverage machine learning models, and support rapid product experimentation.
• Work with cutting-edge ML—model tuning and prompt engineering—to build safe chat experiences that are novel even by industry standards.
• Design and implement top-tier moderation systems to uphold global and regional policy compliance, preventing harmful content across a variety of developer-customized communication products
• Introduce and improve our processes to help us be more effective and efficient.
• Enforce high quality standards while we iterate on feature development.
• Collaborate with other engineering and product teams (Game engine, Creator, Trust & Safety to name a few) at the company to push the boundary of what is possible
• Self-organize and take ownership of projects throughout its full lifecycle.

You have:

• Experience in backend software development
• 2+ years industry experience building and supporting ML systems in a production environment.
• Hold a Bachelor’s degree or equivalent experience in Computer Science, Computer Engineering, or a similar technical field.
• Experience collaborating with backend engineers on client/server design and architecture for high-scale products, including knowledge of performance principles like caching and modern technologies.
• Experience collaborating with cross-functional partners in Product, Design, and Data Science to drive meaningful results that align with the team's overarching vision

You are: 

• Responsible: you build systems that work and keep on working reliably. You are thorough in your designs, rigorous in handling potential failure cases, and diligent in automated testing.
• Analytical: Excited to investigate large, ambiguous problems, and quantify the problems and the solutions.
• Creative: You take a creative and strategic approach to solving hard problems and driving new tools/functionality for our end users and game developers 
• Team-oriented:   You are able to work well as part of a team and know how to collaborate with all participants to develop the best solutions. Able to write clear design specs, mentor junior engineers, and guide projects from beginning to end
• Data-driven focused on quality metrics and monitoring

Bonus:

• Experience building communication products and features.
• Experience working closely with design, strong design interest/background.
• Experience with LLMs
• Experience using big data query/processing languages and tools such as SQL, Hive, Spark and Airflow
• Experience of test driven development.