Senior Software Engineer- Account Authentication

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

Benefits offered by this job

Equity compensation

Job summary

Roblox in San Mateo, CA seeks an experienced senior full‑stack engineer to own end‑to‑end safety features within Account Authentication. You’ll work across teams to scale services, implement passwordless sign‑in, and secure accounts while delivering high‑throughput, safe systems.

You have 8+ years of full‑stack experience, strong distributed systems skills, a safety‑minded approach, and comfort mentoring juniors.

Qualifications

• Proven ability to design robust, high-throughput microservices.
• Experience with end-to-end full-stack feature delivery.
• Strong safety, data integrity, and policy compliance focus.
• Equivalent experience or a technical degree in CS, Math, Physics, Engineering or similar.

Responsibilities

• Own complete lifecycle for full-stack features within Account Authentication.
• Collaborate across security, infra, and client platform teams.
• Mentor junior engineers while making technical contributions.
• Lead cross-functional initiatives to adopt core safety applications.
• Propose solutions to ambiguous problems and guide 2–4 ICs.

Skills

Distributed Systems

Full‑Stack

Safety Mindset

Data‑Driven

Mentorship

AI‑Native

Education

BS in Computer Science / related

Tools

React

Vue

Lua

Rust

C#

C++

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.

WHY SAFETY?

At Roblox, we strive to connect a billion people with optimism and civility, and the Safety organization’s mission is to become the leader in civil immersive online communities. We systematically detect, remove, and prevent problematic accounts, content and behavior, and we make Roblox accounts secure and free from compromise. We cover a broad area of the tech spectrum, including machine learning, classifiers for 3D models, experimentation, automation, detection workflows, and AI-powered text filters. Aligned and partnering with product teams, we use this toolbelt to discover new opportunities, influence and shape the product roadmap and prioritization, build safety products, and measure the impact on our community of users and developers. In doing so, we keep Roblox safe, civil, and inclusive, and we foster positive relationships between people around the world.

WHY Account Authentication

We provide the gateway for users having access to millions of experiences and the broader Roblox community. Nearly every feature on the platform assumes that the user is who they say they are. The role of the Account Authentication pod is to provide that assurance at sign‑up, login, account recovery and elsewhere.

You Will:

• Assume ownership of the complete lifecycle for full-stack features within Account Authentication. Past examples of this team’s contributions include:
  • Supporting platform expansion onto consoles like Xbox and Playstation.
  • Providing mechanisms for users to go entirely passwordless from sign‑up while still having recoverable accounts.
  • Scale our backend systems by supporting token authentication on edge nodes.
  • Implementing service accounts to support testing (and potentially NPCs) by 3P agents.
• Lead cross team collaboration across organizational and functional boundaries. Especially with various security, infra, and client platform teams.
• Mentor more junior engineers while also making individual technical contributions. We are looking for a hands‑on technical lead.
• Take complete responsibility for projects throughout their entire lifecycle.
• Drive cross‑functional engagement and lead technical initiatives to ensure the widespread adoption and success of our core safety applications.
• Propose and land solutions to ambiguous problems while leading cohorts of 2-4 more junior individual contributors.

You Have:

• Distributed Systems Architecture: Proven ability to design and implement robust, high-throughput microservices (handling thousands of requests per second) while maintaining a strict focus on system safety and security.
• Full‑Stack Proficiency. The team works on projects vertically. Experience with front end frameworks (e.g., React, Vue, Lua) as well as App/System languages (e.g. Rust, C#, C++) to deliver end‑to‑end features.
• Safety‑Driven Mindset: A strong commitment to designing, implementing, and maintaining systems that prioritize user safety, data integrity, and compliance with safety policies.
• Equivalent experience or a BS in Computer Science, Applied Math, Physics, Engineering, Statistics, or another technical field.
• Curious to learn new technologies and systematically grow your skills.

You Are:

• • Experienced (8+ years): You have extensive experience as a full‑stack engineer working on complex, production‑grade systems end‑to‑end.
  • Entrepreneurial: It is important to use that people on the team are pro‑active about proposing scope and willing to dig into data to make the case for their ideas.
  • Analytical & Data‑Driven: You possess a strong ability to instrument, collect, and analyze user interaction data (e.g., A/B testing, usage metrics) to inform design decisions and continuously maximize user impact and product performance.
  • Team‑Player & Technical Leader: You are a collaborative team member who actively mentors peers, drives technical excellence, and takes ownership of leading and delivering key features and projects across team boundaries.
  • AI native: You are eager to define and build AI‑centric solutions, incorporating modern machine learning and agentic AI capabilities directly into the core user experience and system architecture.

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

$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 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.