Principal Software Engineer, GenAI Platform

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Principal Software Engineer, GenAI Platform in USA new

Roblox
Full time
Email

USA
10/29/2026
Report

San Mateo, CA

Responsibilities

Define the multi-year technical vision and architecture for machine learning, generative AI, and agentic-experience platforms.
Lead high-impact platform initiatives involving multi-provider inference resiliency and information retrieval infrastructure for agentic systems.
Establish self-service standards, paved paths, guardrails, usage attribution, metering, spend controls, and onboarding for platform users.
Make foundational trade-offs across quality, latency, reliability, cost, responsible data use, instrumentation, and observability.
Own SLOs, capacity planning, on-call, incident response, graceful degradation, and recovery for the platform.
Set technical direction across teams, build alignment with engineering and leadership, and mentor engineers through design and code review.

Requirements

Undergraduate or graduate degree in computer science or a related technical field, or equivalent practical experience.
8+ years of experience building and operating large-scale production software, distributed systems, cloud services, or related infrastructure.
Sustained experience designing and owning foundational systems or platforms with organization- or company-wide impact.
Deep expertise in one or more of machine learning, generative AI, distributed systems, data infrastructure, or developer platforms.
Expert proficiency in one or more of Go, Python, or Rust.
History of setting technical direction across multiple teams and completing large cross-organizational initiatives.
Exceptional communication and influence skills across engineering, product, and leadership.
Preferred experience with LLM gateways, inference serving, model routing, vector databases, similarity search, knowledge graphs, RAG, agentic systems, multi-tenant platforms, GPU infrastructure, or ML inference efficiency.

Benefits

Full-time employees are eligible for equity compensation and benefits.
For San Mateo headquarters roles, the starting annual base salary range is $328,610–$362,280 USD.
Office-based roles are onsite Tuesday through Thursday, with optional presence Monday and Friday unless otherwise noted.
Roblox provides reasonable accommodations during the recruiting process for qualifying disabilities or religious beliefs.

Salary: $329k - $362k/yr

Roblox

Roblox's vision is to reimagine the way people come together. Our mission is to connect a billion people with optimism and civility. What is Roblox? Roblox is a platform where people come together virtually to share experiences. Every day, tens of millions of people from around the world come to ...

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