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.

As a Senior/Principal Backend Software Engineer on the Personalization team, you will help build features that are used by millions of users daily. The team is responsible for providing our users with personalized and relevant recommendations. We want to empower people to find content they’ll love, to foster long-term engagement on Roblox, and to connect experiences with the people that are right for them. With daily active users growing at a new record rate, we are looking for experienced backend engineers who are passionate about designing and scaling the systems that power Roblox's content distribution funnel across different surfaces. 

You Will: Design and build the systems architecture that powers Roblox content distribution across surfaces. Lead the design and implementation necessary to grow the backend Infrastructure across our tech stack of C#, Go, and several data pipeline technologies. Collaborate with other teams within Roblox to make sure we are building products with community mindset. Balance researching new technologies with a practical approach to work towards the research efforts into the Roblox products You Have: You have 7+ years of experience designing and building full-stack systems behind consumer-facing APIs that can handle large numbers of concurrent users. Have dealt with scalability and reliability issues associated with different system architectures including microservice architecture. Knowledgeable about server-side architecture/design and compiled languages such as C#, Java, C++, or others. An expert in SQL database-based applications with in-depth knowledge of query optimization and scalability concerns. Exposure to Discovery products like Search and Recommendations or real-time machine learning systems. You have a BS in Computer Science or a related discipline, Advanced degrees are a definite plus.

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$315,850—$383,910 USD

Roles 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: 

Industry-leading compensation package Excellent medical, dental, and vision coverage A rewarding 401k program Flexible vacation policy (varies by exemption status) Roflex - Flexible and supportive work policy  Roblox Admin badge for your avatar 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.