Mobile Engineer – iOS​/Android; Onsite

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.

About the Team:

Our Mobile Engineering teams build the core experiences that power how millions of learners study on Quizlet every day. From foundational study tools to AI-powered features, we focus on creating intuitive, performant, and high-quality mobile experiences across iOS and Android.

We partner closely with Product, Design, and Backend teams to deliver seamless, engaging learning experiences.

About the Role:

We’re hiring Mobile Engineers across multiple levels (Staff Mobile Engineer - Principal Mobile Engineer), with leveling determined through the interview process.

In this role, you’ll design, build, and ship mobile features that directly impact how learners engage with Quizlet. You’ll contribute to both new product development and improvements to existing systems, with a focus on performance, reliability, and user experience.

Success is measured by your ability to deliver high-quality mobile experiences and contribute to overall product velocity and quality.

We’re happy to share that this is an onsite position in either our Seattle or San Francisco office. To help foster team collaboration, we require that employees be in the office aminimum 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 high-quality mobile applications across iOS and/or Android
• Collaborate with Product, Design, and Engineering partners to define and deliver features
• Improve app performance, reliability, and overall user experience
• Contribute to architecture decisions and evolve mobile systems over time
• Drive code quality, testing, and engineering best practices
• Participate in debugging, incident response, and continuous improvement efforts

• Experience building and shipping mobile applications (iOS and/or Android)
• Strong problem-solving and debugging skills in mobile environments
• Proficiency in native mobile development (Swift, Kotlin/Java) and familiarity with cross-platform approaches
• Experience with performance optimization and scalable mobile architectures
• Ability to operate across ambiguity and drive projects end-to-end
• Strong collaboration and communication skills

• 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 $200,000 - $259,000, 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

Why Join Quizlet?

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

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

📈 Strong momentum:
Top-t…