Senior AI Platform Architect - Build for Scale (Equity)

Roblox; San Mateo (CA); On-site; USD 345,000 - 399,000; Full time

Benefits offered by this job

Equity compensation

Job summary

Roblox is seeking a Principal Software Engineer on the Build Platform team to set the technical direction for the infrastructure behind AI-powered creation at scale.

You will own the Build agent platform architecture, drive reliability, observability, and cost-efficiency, and mentor engineers while collaborating with product, ML infra, and Safety teams. The role is based in San Mateo, CA with strong growth opportunities.

Qualifications

• 8+ years of experience 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, such as model serving, orchestration, LLM integration, or agentic execution loops (planning, tool use, recovery, long-running workflows).
• A BS in Computer Science or a related field, or equivalent professional experience.
• The judgment to weigh tradeoffs and make pragmatic calls under ambiguity.
• 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).

Responsibilities

• Own the technical architecture and long-term roadmap for the Build agent platform.
• Design for reliability, safety, observability, and cost efficiency in production AI workloads, including usage metering and model-routing strategy.
• Define how we measure agent quality and build the evaluation infrastructure that drives model, prompt, and skill decisions.
• Partner with Build product teams, ML infrastructure, and Safety to ship new capabilities quickly and safely.
• Raise the engineering bar through design reviews, mentorship, and hands-on technical leadership.

Skills

Distributed systems

Backend architecture

AI/ML systems

Model serving

Team leadership

Education

BS in Computer Science or related field

Tools

Temporal

Job description

Roblox is seeking a Principal Software Engineer on the Build Platform team to set the technical direction for the infrastructure behind AI-powered creation at scale.

You will own the Build agent platform architecture, drive reliability, observability, and cost-efficiency, and mentor engineers while collaborating with product, ML infra, and Safety teams. The role is based in San Mateo, CA with strong growth opportunities.