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Joseph Nguyen

@josephnguyen

Senior Software Engineer at Roblox who launched Roblox Assistant and real-time AI moderation pipelines at multi-billion event scale.

United States
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At Roblox, I led development of real-time AI content moderation pipelines that use transformer-based models to detect policy violations in chat and voice at multi-billion event scale. I also launched Roblox Assistant, an LLM-powered natural-language coding assistant for generating Lua scripts and 3D assets.

I fine-tuned and deployed LLaMA and CodeGen models for in-editor code generation, reducing prototyping time by 40%. I also built low-latency audio classification services that cut moderation response time by 20%.

At Exabeam, I developed backend microservices and streaming data pipelines for the New-Scale SIEM platform. My work included improving threat detection and scaling log ingestion, while a Redis-based caching upgrade increased enterprise ingestion throughput by 30%.

At PlayStation, I developed high-concurrency services for the PlayStation Network and contributed to cloud migrations and PlayStation Plus features. I also worked on Redis caching and React.js dashboards for internal network monitoring.

Experience

Work history, roles, and key accomplishments

Roblox logoRO
Current

Senior Software Engineer

Apr 2025 - Present (1 year 6 months)

Led end-to-end development of real-time AI-powered content moderation pipelines, deploying transformer-based NLP models at multi-billion event scale. Architected fault-tolerant microservices on Kubernetes with GPU-accelerated inference, and spearheaded integration of generative AI tooling into Roblox Studio.

Exabeam logoEX

Senior Software Engineer

Nov 2023 - Apr 2025 (1 year 5 months)

Architected core backend services for the cloud-native New-Scale SIEM platform, standardizing on OpenAPI Standard. Integrated high-throughput streaming data ingestion pipelines into Kubernetes microservices and optimized UEBA algorithms for improved threat detection.

PlayStation logoPL

Software Engineer - Intern

Jun 2020 - Sep 2020 (3 months)

Assisted senior developers in designing and writing modular features for the PlayStation Network platform, gaining hands-on experience with enterprise Java architectures and REST APIs. Learned to optimize data validation scripts using Python and helped expand code reliability with test suites.

PO

Software Engineer - Intern

POPin

Jun 2019 - Sep 2019 (3 months)

Developed and shipped an internal tooling feature for the POPin platform using Java and REST APIs. Optimized automated data validation scripts using Python and built interactive data tracking dashboards using React.js.

Education

Degrees, certifications, and relevant coursework

University of California, Santa Cruz logoUC

University of California, Santa Cruz

Bachelor's Degree, Computer Science

2015 - 2019

Bachelor's Degree in Computer Science from the University of California, Santa Cruz, completed in 2019.

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