Senior Software Engineer, Geometry

Roblox; San Mateo (CA); On-site; USD 243,290 - 295,250; Full time

Job summary

Roblox is seeking a Senior Software Engineer for their Geometry team to lead development of algorithms for real-time 3D content creation. You will solve complex computational problems and ensure collaboration across various teams to improve user experiences.

The ideal candidate has over 5 years of C++ experience with a strong background in computational geometry. This role offers an opportunity to shape the platform and work with innovative technologies in a fast-paced environment.

Qualifications

• 5+ years of industry experience in C++ and 3D application development.
• Strong grasp of computational geometry concepts.
• Active in mentoring junior collaborators.

Responsibilities

• Lead complex, team-level projects through the full development lifecycle.
• Develop efficient algorithms for geometry processing.
• Provide technical guidance and mentorship to junior engineers.

Skills

C++

3D application development

Computational geometry

Algorithms

Education

MSc or Ph.D. in Computer Science, Engineering, Mathematics

Tools

WebGL

Unity

Unreal Engine

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 Senior Software Engineer on our Geometry team, you will drive foundational algorithms for real‑time 3D content creation and editing that power the Roblox platform. Working in a small, autonomous team, you will solve novel math computational problems and deliver immersive, expressive creative tools to millions of users. At this level, you are expected to own pod‑level or team‑level projects from inception to implementation, provide technical direction to junior collaborators, and contribute to the team’s long‑term technical strategy.

You Will:

• Own End-to-End Development: Lead complex, team‑level projects through the full development lifecycle, from research and prototyping to production deployment and maintenance.
• Architect Robust Solutions: Develop efficient algorithms for geometry processing (e.g., convex decomposition, mesh partitioning, boolean operations) that support real‑time simulation, collision detection, and performance requirements across all platforms.
• Mentor and Lead: Provide technical guidance and mentorship to junior engineers, fostering a culture of high standards, code quality, and collaborative architectural discussions.
• Solve Computational Problems: Tackle discrete math and computational geometry challenges, applying linear algebra, numerical solvers, and advanced data structures to deliver robust features.
• Think Systemically: Anticipate downstream impacts of your technical decisions, ensuring solutions are scalable, maintainable, and aligned with the long‑term vision of the Geometry and Engine teams.
• Collaborate Cross-Functionally: Work closely with other teams (Graphics, Physics, Avatar) to ensure cohesive integration of geometry components into the broader Roblox experience.

You Have:

• Experienced: You have 5+ years of industry experience (or equivalent research experience) in C++ and 3D application development, specifically in optimizing 3D game engines or real‑time geometry applications.
• Technically Proficient: Highly skilled in modern C++ with a focus on writing organized, efficient, and reusable code. You possess deep knowledge of advanced data structures, algorithms, and computational linear algebra (vector/matrix math, numerical solvers, finite‑element methods).
• Mathematically Minded: You have a passion for solving complex geometry problems and a strong grasp of computational geometry concepts, simulation, and real‑time graphics.
• A Proven Mentor: You actively seek opportunities to learn from peers and effectively guide junior collaborators, elevating the team’s collective skill set.
• Agile and Systematic: You excel in navigating ambiguity, breaking down complex requirements into deliverable stages, and making data‑driven decisions that align with organizational objectives.
• Educated: You are a natural coder and problem‑solver, ideally holding an MSc or Ph.D. in Computer Science, Engineering, Mathematics, or a related field with a focus on computational geometry, modeling, or simulation.

Nice-to-Haves:

• Experience with WebGL or other web-based 3D frameworks.
• Experience programming in Unity or Unreal Engine.
• Led feature development from concept definition to shipping a product.
• A history of publications or contributions to the field of computational geometry.

Annual Salary Range

$243,290 — $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 U.S. 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.