About Quizlet

At Quizlet, our mission is to help every learner achieve their outcomes in the most effective and delightful way. We’re a $1B+ learning platform used by two-thirds of U.S. high school students and half of college students, powering over 1 billion learning interactions each week.

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.

Let’s Build the Future of Learning

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

Why Join Quizlet?

🌎 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

About the Team

Quizlet's Product Engineering organization builds the core experiences that help millions of students and teachers achieve their learning goals. We collaborate across teams to achieve user-centric outcomes, focusing on developing intuitive interfaces, engaging learning tools, and robust, scalable systems.

You’ll be joining a passionate group of engineers, designers, product managers, and data scientists dedicated to solving real-world educational challenges. Our teams operate with autonomy, embrace experimentation, and are deeply committed to user-centric design. We value transparency, inclusivity, and collaboration at all levels.

Our (non-exhaustive) Tech Stack:

Languages: Go, PHP, Typescript

Frameworks: React, Next.js, UIKit, SwiftUI, Jetpack Compose

Data: MySQL, PostgreSQL, Spanner, BigQuery

Misc: GCP, Datadog, Growthbook, Rollbar, Pub/Sub, Redis/Valkey, Docker/Colima, Kubernetes

About the Role

We're looking for a Senior Software Engineer to design, build, and deliver the architecture that supports Quizlet's users, authentication, and engineering teams. You'll work closely with other engineers, product managers, and partners in Security, Privacy, and Product to turn complex requirements into secure, reliable, and well-designed systems that serve millions of learners globally.

As a senior individual contributor, you'll take ownership of complex projects from concept through deployment, applying sound technical judgment and balancing trade-offs between security, reliability, performance, and maintainability. You'll play a key role in shaping architecture, driving best practices, and mentoring teammates through code reviews, design discussions, and technical guidance.

This role involves careful, incremental change to systems that cannot go down: planning migrations, rolling out safely, and leaving behind clear designs and documentation that other teams can build on.

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.

In this role, you will

Deliver end-to-end projects that directly contribute to Quizlet's platform and business priorities, from planning and design through implementation, testing, and rollout

Design, build, and operate authentication and account systems (login, signup, SSO, sessions, and account security) used by millions of learners and teachers

Lead incremental migrations from legacy systems to new services, using feature flags, ramped rollouts, backfills, and rollback plans so users see no disruption

Define service boundaries, APIs, data models, and event contracts for shared platform services such as the User Service

Build privacy and compliance foundations into the platform, including account deletion, data requests, age and consent requirements, and data separation for school district agreements