Software Engineer, Communications

Roblox; California (MO); On-site; USD 153,000 - 197,000; Full time

Benefits offered by this job

Equity compensation

Benefits package

Job summary

Roblox is seeking a Software Engineer on the Communications team to build real-time chat infrastructure and safety ML models for billions of users. You will scale backend services, data pipelines, and ML systems to keep conversations fast, civil, and expressive across 2D/3D experiences.

Based in San Mateo, CA, this full‑time role includes equity compensation and a comprehensive benefits package; onsite presence is expected Tue–Thu with flexible options.

Qualifications

• Bachelor's degree or equivalent in CS/Engineering or related field.
• Experience building production ML systems and backend services.
• Ability to design for high-scale, high-availability systems.

Responsibilities

• Build and scale backend services for real-time chat and safety.
• Develop data pipelines and ML models for content moderation.
• Collaborate with Product, Design and Data Science to achieve team goals.

Skills

Backend development

ML systems

Systems design

Collaboration

Performance optimization

Education

Bachelor's degree or equivalent

Tools

SQL

Hive

Spark

Airflow

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.

As a Software Engineer on the Communications team, you will work on real-time communication across 2D and 3D spaces for billions of users while keeping interactions civil, safe, and expressive. Communication is at the core of what makes Roblox a vibrant social platform, the systems you build will define how tens of millions of people connect every day.

You will work with teams across Game Engine, Safety, and ML Platform, building backend services at scale, data pipelines, and ML models that strengthen the underlying chat and policy infrastructure. You will build and ship detection systems that identify chat violations and continuously evolve to outpace bad actors circumventing our safety policies. As a core contributor to a broader suite of communication products, you will drive feature development while embedding safety into the foundation of the platform.

If you are a developer with an understanding of large scale systems and want to shape how the next generation of Roblox users interact safely in the metaverse, you’ll be right at home within our highly-skilled and rapidly growing team.

You will:

• Engineer and scale the communication infrastructure that supports millions of concurrent users, architecting highly reliable systems that keep chat civil, proactively detect violations using machine learning models and data pipelines, and define how people connect on Roblox.

• Work with cutting‑edge ML—model tuning and prompt engineering to build safe chat experiences that are novel even by industry standards.

• Contribute as needed to the full spectrum of communication product development, from core infrastructure and safety systems to user‑facing features.

• Introduce and improve our processes to help us be more effective and efficient.

• Enforce high quality standards while we iterate on feature development.

• Collaborate with other engineering and product teams (Game engine, Creator, Trust & Safety to name a few) at the company to push the boundary of what is possible

• Self‑organize and take ownership of projects throughout its full lifecycle.

You have:

• Experience in backend software development

• 2+ years industry experience building and supporting ML systems in a production environment.

• Hold a Bachelor’s degree or equivalent experience in Computer Science, Computer Engineering, or a similar technical field.

• Experience collaborating with backend engineers on client/server design and architecture for high-scale products, including knowledge of performance principles like caching and modern technologies.

• Experience collaborating with cross‑functional partners in Product, Design, and Data Science to drive meaningful results that align with the team's overarching vision

You are:

• Responsible: you build systems that work and keep on working reliably. You are thorough in your designs, rigorous in handling potential failure cases, and diligent in automated testing.

• Analytical: Excited to investigate large, ambiguous problems, and quantify the problems and the solutions.

• Creative: You take a creative and strategic approach to solving hard problems and driving new tools/functionality for our end users and game developers

• Team‑oriented: You are able to work well as part of a team and know how to collaborate behind all participants to develop the best solutions. Able to write clear design specs, mentor junior engineers, and guide projects from beginning to end

• Data‑driven focused on quality metrics and monitoring

Bonus:

• Experience building communication products and features.

• Experience working closely with design, strong design interest/background.

• Experience with LLMs

• Experience using big data query/processing languages and tools such as SQL, Hive, Spark and Airflow

• Experience of test driven development.

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

$153,120—$196,750 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.