Principal Software Engineer - Core Services

Company: Roblox Corporation
Location: San Mateo
Posted on: May 24, 2025

Job Description:

Every day, tens of millions of people come to Roblox to explore, create, play, learn, and connect with friends in 3D immersive digital experiences- all created by our global community of developers and creators.At Roblox, we're building the tools and platform that empower our community to bring any experience that they can imagine to life. Our vision is to reimagine the way people come together, from anywhere in the world, and on any device. We're on a mission to connect a billion people with optimism and civility, and looking for amazing talent to help us get there.A career at Roblox means you'll be working to shape the future of human interaction, solving unique technical challenges at scale, and helping to create safer, more civil shared experiences for everyone.Why Core Services?The Core Services team operates the core infrastructure and API stack and constructs highly efficient microservices that powers https://www.roblox.com. These services need to be fast, reliable and scalable as they have a huge impact on the daily experience of every Roblox user. Also, the team owns shared libraries, infrastructure microservices, and the web infrastructure used by all other Roblox full-stack feature teams. We ship with testable and configurable features that allow for rapid experimentation, data collection, and optimize for performance and user engagement. From serving basic user information to populating content into in-experience. Core Services is integral to the Roblox experience.Here are a few quick highlights of how we power Roblox:

• Microservices - we manage 50+ microservices, the most of any Roblox full-stack engineering team. Most of these services handle access to production databases to return users related data to the rest of Roblox architecture. These services are crucial to run Roblox. They sit right at the heart of the connection between product and infrastructure.
• API Scale - we run services that hit 500K - 3M RPS, the highest load of any Roblox full-stack engineering team. Scalability and reliability of these services is important to keep the product alive.
• Thumbnails - our system generates 20,000 - 50,000 thumbnails at peak. Perfect for viewing all your avatar clothing options!
• Roblox website - managing the production machines behind running the website while re-architecting it is a real interesting architectural challenge. If you're interested in changing the airplane's engine while it's flying, you'll like this challenge.As a Principal Engineer within the team, you will own and drive the development and management of core infrastructure, API stack, and microservices. These components are essential for supporting a range of services and platforms within Roblox, including our studio environment. Additionally, you will contribute to the development of tooling and frameworks for other product teams. You will take ownership of high RPS (requests per second) services, re-architect them and scale them to accommodate our company's growth, and collaborate with a diverse set of teams including Infra and the product teams within Roblox, leading initiatives, and making a significant impact across the company.You will:
  • Report into the Core Services Organization.
  • Build, maintain, and scale systems to support our goal of 1 billion active users.
  • Design backend features for https://www.roblox.com and mobile apps on iOS, Android, and Amazon platforms.
  • Collaboratively build new microservices using Docker, .NET Core, and container orchestration.
  • Build and establish core infrastructure accessible to all Roblox teams.
  • Enforce high code quality standards, architectural designs, and long-term approaches as a gatekeeper.You have:
    • Experience in C#, Java, Go or any other object-oriented programming language.
    • 9+ Years of Experience building web applications in frameworks such as ASP.NET, SpringMVC, Express, Rails, or Flask.
    • Experience designing high traffic REST APIs, using Containers and microservices.
    • Experience building large scale distributed systems with focus on scalability, reliability, and availability.
    • Experience in debugging, mitigating, and root causing problems in the production environment in a timely and systematic manner.
    • Experience leading cross team greenfield projects.
    • Bachelor's degree in Computer Science or a related field, or equivalent experience.For roles that are based at our headquarters in San Mateo, CA: The starting base pay for this position is as shown below. The actual base pay is dependent upon a variety of job-related factors such as professional background, training, work experience, location, business needs and market demand. Therefore, in some circumstances, the actual salary could fall outside of this expected range. This pay range is subject to change and may be modified in the future. All full-time employees are also eligible for equity compensation and for benefits.Annual Salary Range: $273,070 - $338,270 USDRoles that are based in our San Mateo, CA Headquarters are in-office Tuesday, Wednesday, and Thursday, with optional in-office on Monday and Friday (unless otherwise noted).You'll Love:
      • Excellent medical, dental, and vision coverage.
      • A rewarding 401k program.
      • Flexible vacation policy (varies by exemption status).
      • Roflex - Flexible and supportive work policy.
      • At Roblox HQ:
      • Free catered lunches five times a week and several fully stocked kitchens with unlimited snacks.
      • Onsite fitness center and fitness program credit.
      • Annual CalTrain Go Pass.Roblox provides equal employment opportunities to all employees and applicants for employment and prohibits discrimination and harassment of any type without regard to race, color, religion, age, sex, national origin, disability status, genetics, protected veteran status, sexual orientation, gender identity or expression, or any other characteristic protected by federal, state or local laws. Roblox also provides reasonable accommodations for all candidates during the interview process.
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Keywords: Roblox Corporation, Woodland , Principal Software Engineer - Core Services, IT / Software / Systems , San Mateo, California