Sr. Software Engineer – User Identity, Messaging & Trust Infrastructure

About Quizlet

At Quizlet, our mission is to help every learner achieve their outcomes in the most effective and delightful way. Our $1B+ learning platform serves tens of millions of students every month, including two-thirds of U.S. high schoolers and half of U.S. college students, powering over 2 billion learning interactions monthly.

We blend cognitive science with machine learning to personalize and enhance the learning experience for students, professionals, and lifelong learners alike. We’re energized by the potential to power more learners through multiple approaches and various tools.

Join us to design and deliver AI-powered learning tools that scale across the world and unlock human potential.

As a Senior Software Engineer, you will work on critical infrastructure powering identity, account management, and trust and safety systems that serve millions of learners. You'll partner with experienced engineers and product managers to improve our secure sign-up/login flows, support compliant messaging, and implement scalable systems for user protection and privacy.

We’re happy to share that this is an onsite position in our San Francisco office. To help foster team collaboration, we require that employees be in the office a minimum of three days per week
:
Monday, Wednesday, and Thursday and as needed by your manager or the company. We believe that this working environment facilitates increased work efficiency, team partnership, and supports growth as an employee and organization.

• Build and maintain secure authentication and account services (OAuth2, MFA, SSO)
• Help scale our user messaging platform, integrating systems like Braze
• Implement features that support moderation, privacy requests, and abuse detection
• Ensure regulatory compliance through thoughtful consent flows and data handling

• 10+ years of backend/platform engineering experience, with 5+ years in identity, messaging, or trust systems
• Experience in modernizing legacy account systems and building privacy-centric user platforms
• Hands‑on experience in security, compliance, and messaging infrastructure (e.g., rate limiting, consent management, opt‑in flows)
• Hands‑on experience with Node.js, Go, Python, or Type Script.
• Familiarity with tools like Braze, Segment, or equivalent martech stacks.
• Passion for building platforms that enable scale, intelligence, and trust
• Fluency with platform security, privacy, and system design.
• Proven ability to lead architectural transformation while shipping continuously
• Strength in cross‑functional collaboration, especially with legal, marketing, and product

• Quizlet is an equal opportunity employer. We celebrate diversity and are committed to creating an inclusive environment for all employees. Salary transparency helps to mitigate unfair hiring practices when it comes to discrimination and pay gaps. Total compensation for this role is market competitive, including a starting base salary of $258,000 – $314,000, depending on location and experience, as well as company stock options
• Collaborate with your manager and team to create a healthy work‑life balance
• 20 vacation days that we expect you to take!
• Competitive health, dental, and vision insurance (100% employee and 75% dependent PPO, Dental, VSP Choice)
• Employer-sponsored 401k plan with company match
• Access to Linked In Learning and other resources to support professional growth
• Paid Family Leave, FSA, HSA, Commuter benefits, and Wellness benefits
• 40 hours of annual paid time off to participate in volunteer programs of choice

🌎 Massive reach: 60M+ users, 1B+ interactions per week

🧠 Cutting‑edge tech:
Generative AI, adaptive learning, cognitive science

📈 Strong momentum:
Top‑tier investors, sustainable business, real traction

🎯 Mission‑first:
Work that makes a difference in people’s lives

🤝 Inclusive culture:
Committed to equity, diversity, and belonging

We strive to make everyone feel comfortable and welcome!

We work to create a holistic interview process, where both Quizlet and candidates have an opportunity to view what it would be like…