Senior Software Engineer, Application Gateway

Roblox; California (MO); On-site; USD 227,000 - 295,000; Full time

Job summary

Roblox is seeking a senior engineer to design, build, and operate the Envoy-based application gateway fleet, the front door for billions of daily requests, owning L7 routing, authentication, rate limiting, and traffic policy end to end.

You will ensure reliability at scale, model capacity, reduce edge incidents, and collaborate with the internal networking and service teams to deliver a coherent traffic story across clusters and regions, while mentoring junior engineers in testing and

Qualifications

• 3+ years of experience in distributed systems.
• Deep knowledge of networking concepts, Envoy, Kubernetes.
• Expertise with Go, C/C++, or Rust.
• Production Kubernetes experience and on-call readiness.
• Strong problem-solving and collaboration abilities.

Responsibilities

• Design, build, and operate Roblox's Envoy-based application gateway fleet, the front door for billions of daily requests, owning L7 routing, authentication, rate limiting, and traffic policy end to end.
• Own the reliability and scale characteristics of the gateway: capacity modeling, failure isolation, and progressive delivery of config and code changes.
• Partner with internal networking and service teams to deliver a coherent traffic story from client to service across clusters and regions.
• Serve as a primary escalation point for edge and gateway issues, debugging Envoy configurations, xDS, TLS termination, and network stack.
• Mentor junior engineers and promote reliability engineering best practices.

Skills

Distributed systems

Networking architecture

Go

C/C++

Rust

Envoy & xDS

Kubernetes production

Tools

Envoy

Kubernetes

Go

C/C++

Rust

xDS

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.

Who We Are:

Roblox is reimagining the way people come together to connect, create, and express themselves. To support our massive scale, we are powered by thousands of microservices. The Application Networking team connects and secures these services, building ingress gateways, managing the service mesh, and enabling seamless communication across Roblox’s hybrid on-prem and cloud infrastructure.

We are executing on Cloud Bursting, a strategic initiative to enable Roblox’s core services to transparently burst from on-prem data centers to the cloud, allowing us to handle historical peak concurrent players and survive regional failures. You will join our Application Gateway team to build the networking infrastructure that makes this possible.

You Will:

• Design, build, and operate Roblox's Envoy-based application gateway fleet — the front door for billions of daily requests — owning L7 routing, authentication, rate limiting, and traffic policy end to end.

• Own the reliability and scale characteristics of the gateway: capacity and headroom modeling, failure isolation and blast-radius reduction, progressive delivery of config and code changes, and measurable reduction in edge-caused incidents.

• Partner with the internal networking and service teams to deliver one coherent traffic story from client to service, abstracting cluster and regional boundaries away from application developers.

• Serve as a primary escalation point for complex edge and gateway issues, debugging across Envoy configuration and internals, xDS control plane behavior, TLS termination, and the underlying network and load-balancing stack.

• Act as a senior voice on the team, mentoring junior engineers and promoting best practices in testing, deployment, and reliability engineering.

You Are:

• A professional with 3+ years of experience in distributed systems, with strong expertise in networking architecture and technologies (Envoy, Kubernetes). You understand the tradeoffs of sidecar-based microservice architectures at scale.

• Deeply knowledgeable of L7 networking concepts: routing and request transformation, TLS termination and certificate management, authentication and authorization, rate limiting, and load-balancing.

• Experienced running Kubernetes in production and familiar with the K8s networking model.

• Comfortable working with Envoy proxy internals, xDS APIs, and control plane architectures.

• Excellent at designing large-scale distributed systems that span multiple clusters, regions, and runtime environments.

• Fluent in Go, C/C++, or Rust.

• Experienced with on-call rotations and approach infrastructure with a “reliability-first” mindset.

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 as described on this page.

Annual Salary Range

$227,370—$295,250 USD

Roles that are based in an office are onsite Tuesday, Wednesday, and Thursday, with optional presence on Monday and Friday (unless otherwise noted).

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 to candidates with qualifying disabilities or religious beliefs during the recruiting process.

For US based roles only, please note the Company may not be able to employ candidates for this role who have United States work authorization related to certain U.S. visa categories, or support future H-1B sponsorship at this time.