Senior Software Engineer, Ads Platform

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 Software Engineer on our Ads Platform team, you will architect and build foundational ads systems that are capable of reliably serving Roblox’s massive scale. You will drive performance improvements to our ads serving and delivery infrastructure, while expanding our systems to support a variety of new and immersive ads experiences. Your scope will span across multiple teams and require close collaboration with engineers across ML, backend, and analytics to shape the future of ads infrastructure at Roblox.

This role is a great fit for you if you are proficient in managing large scale systems and data-driven applications and have a zeal for developing inspiring, easily maintainable, and reusable code. Join our highly skilled and rapidly growing team and make a significant impact at Roblox.

This position will report to our Senior Engineering Manager and require you to work onsite at our HQ in San Mateo, CA Tuesdays to Thursdays.

You Will:

• Build and ship best-in-class Ads products used by hundreds of millions of users.


• Develop backend services that scale to billions of products and transactions.


• Be a tech lead and mentor junior engineers


• Self-organize and take ownership of projects throughout their full lifecycle.

You Have

• 5+ years of experience in software development and shipping complex products to production


• Proficiency in one or more systems programming languages such as C#, Go, Rust, Java, C++, or Python.


• Knowledge with REST, GRPC, distributed systems design, scalable containerized systems and microservices. 


• Experience with technologies like Kafka, Flink, Redis, and distributed sql/nosql databases


• Bonus: Experience working in ads systems

You Are:

• A Technical Leader: You have initiated and facilitated challenging technical solutions. Your technical expertise influences product direction. You nurture a culture of technical excellence.


• Data & System Oriented: You understand that robust data is the foundation of great ML systems, and you design infrastructure for scale, correctness, and reliability.


• Collaborative: You thrive in cross-functional teams, partnering effectively with ML, backend, and product engineers to solve complex challenges.


• Curious & Creative: You enjoy tackling hard problems, exploring new technologies, and driving continuous improvements in both systems and workflows.


• Impact Driven: You focus on outcomes - prioritizing product impact, reliability, and measurable success over code volume or complexity.