Principal Software Engineer, Build Platform
Roblox · San Mateo, CA, United States
About this role
## Principal Software Engineer, Build Platform Roblox is building the tools and platform that empower creators to bring any experience they can imagine to life—connecting a billion people with optimism and civility. As a **Principal Software Engineer on the Build Platform team**, you’ll set the technical direction for the infrastructure behind **AI-powered creation** on Roblox. Build lets anyone make a game by describing it, on mobile and in Studio. Your team owns the platform underneath: the cloud-hosted agent harness, tools and skills, and the evaluation framework. ### What you’ll work on - Orchestrating **long-running, multi-step workflows** - **Model integration and routing** across providers - **Tool and skill execution** - **Sandboxed game environments** - **Evaluations at scale** - Reliability, safety, and cost systems to support growth to millions of creators ### You have - **8+ years** building and operating large-scale distributed systems, including technical leadership across multiple teams - Deep experience designing **backend platforms** used by other engineering teams - Hands-on experience with **production AI/ML systems** (e.g., model serving, orchestration, LLM integration, agentic execution loops) - Strong understanding of **tool/skill design** and **structured evaluation** for AI systems - Good judgment to weigh tradeoffs and make pragmatic calls under ambiguity - BS in Computer Science (or related) or equivalent professional experience ### You are - Excited to define how **AI agents create at scale** and stay hands-on - A clear communicator who can explain complex technical direction to engineers, product, and leadership - Experienced with workflow engines (e.g., **Temporal**), multi-provider model routing, or AI cost management *(bonus)* ### You will - Own the **technical architecture** and **long-term roadmap** for the Build platform
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