Senior Software Engineer, Build Platform
About The Position
As a Senior Software Engineer on Roblox’s Build Platform team, you will build cloud infrastructure for AI-driven creation on Roblox. The Build product lets people create games by describing them, then generate, iterate on, playtest, and publish playable experiences. The team owns the underlying platform, including a cloud-hosted agent harness, tools and skills, and an evaluation framework. You will develop systems that help agents operate reliably at scale, including long-running workflow orchestration, model integration and routing, tool execution, sandboxed game sessions, evaluations, and observability, safety, and cost controls. The role also involves partnering with product, ML infrastructure, and Safety teams, supporting production operations, and helping other engineers grow.
Requirements
- At least 5 years of experience building and operating backend or distributed systems in production.
- Proficiency in C#, Java, Go, or a similar programming language.
- Experience with cloud infrastructure, containerized services, and workflow or job orchestration systems such as Temporal or Kubernetes.
- A track record of owning services end to end, including design, launch, monitoring, and incident response.
- A BS in Computer Science or a related field, or equivalent professional experience.
- Curiosity about LLMs and agentic systems, and eagerness to work on how they behave in production.
- A pragmatic approach to shipping iteratively and using data and evaluations to guide decisions.
Nice To Haves
- Experience building on LLM APIs, agent frameworks, or evaluation pipelines.
Responsibilities
- Design, build, and operate agent platform services, including orchestration, session management, model routing, and tool and skill execution.
- Improve the reliability, latency, and cost of multi-step agent workflows running in production.
- Build and extend evaluation infrastructure so teams can measure quality and detect regressions before they reach creators.
- Partner with Build product teams, ML infrastructure, and Safety to ship new capabilities quickly and safely.
- Participate in on-call and help raise the bar for operational excellence.
- Write clear technical specifications, review code, and mentor other engineers.
Benefits
- Equity compensation for full-time employees.
- Benefits are available as described on the company benefits page; specific benefits are not listed in the posting.
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What This Job Offers
Job Type
Full-time
Career Level
Senior
