Sr. iOS Engineer

Quizlet; San Francisco (CA); Hybrid; USD 140,000 - 210,000; Full time

Benefits offered by this job

Healthy work-life balance

20 vacation days

Health insurance (medical, dental, vis

401k with company match

LinkedIn Learning access

Paid Family Leave

FSA/HSA and commuter benefits

Volunteer time off (40 hours)

Job summary

Quizlet is hiring a Senior Engineer for the UX Foundations team in a hybrid role based in San Francisco. You will own core iOS app layers—shared libraries, SDKs, security, CI/CD—and ship user-facing features. The role includes mentoring engineers and collaborating with product teams to deliver high-quality mobile experiences for learners worldwide.

The position supports remote candidates in the US and requires in-office presence 2 days per week in SF or NY if local. Hybrid work arrangement in SF.

Qualifications

• Multiple years of experience in mobile software development.
• Strong problem solving and debugging skills on mobile software products.
• Proficiency in either iOS or Android development and some level of comfort with the other.
• Eagerness to learn, grow, and take on new challenges.
• Excellent verbal and written communication skills across a range of audiences.

Responsibilities

• Design, build, and maintain the core iOS app layers—shared libraries, SDKs, and frameworks.
• Own and ship user-facing features end-to-end—from design through release.
• Own and evolve CI/CD pipelines and the release process for the iOS app.
• Collaborate with product and cross-functional partners to define requirements and deliver solutions.
• Understand and operate in existing systems; propose improvements and new ideas.
• Drive incident investigations, post mortems, and retrospectives; advocate for long-term improvements.
• Influence engineering practices to improve quality of software, testing, and processes.

Skills

Mobile software development

Problem solving & debugging

iOS or Android development

Willingness to learn

Verbal & written communication

Job description

About Quizlet:

At Quizlet, our mission is to help every learner achieve their outcomes in the most effective and delightful way. Weâre 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. Weâre energized by the potential to power more learners through multiple approaches and various tools.

Letâs 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 peopleâs lives
Inclusive culture: Committed to equity, diversity, and belonging

About the Team:

UX Foundations owns Quizlet's mobile apps end to end - both the core app layers everything else is built on (shared libraries and SDKs, security, CI/CD, and the release process) and a steady stream of feature work across the app. Feature teams build user-facing features, but UX Foundations ships features directly just as often, especially where the work touches the foundation itself. We collaborate closely with feature teams, backend services, design, and product to keep the mobile app reliable, fast to build on, and moving forward for learners.

About the Role:

We're looking for a Senior Engineer to join UX Foundations. You'll split your time between owning core iOS app layers â shared libraries, SDKs, security, CI/CD, and the release process â that every feature team builds on, and shipping user-facing features directly. Both are core to the role, not one occasional on top of the other.

In this role, youâll collaborate closely with engineers, designers, and product managers to deliver high-quality mobile experiences. Youâll have the opportunity to influence technical direction, contribute to architecture decisions, and mentor other engineers while driving projects from ideation through release. Weâre looking for someone who is passionate about creating intuitive, performant, and reliable mobile experiences that have a real impact on learners worldwide.

This role is open to remote candidates anywhere in the US, as well as candidates based in our San Francisco or New York offices. If you're based in SF or NY, we ask that you come into the office 2 days per week: Wednesday and Thursday, or 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.

Weâre happy to share that this is a hybrid position in our San Francisco office. To support collaboration, we ask employees to be in the office at least 2 days a week: Wednesday and Thursday.

In this role, you will:

• Design, build, and maintain the core iOS app layers - shared libraries, SDKs, and frameworks - that feature teams build on

• Own and ship user-facing features end-to-end â from design through release â alongside your foundation work

• Own and evolve CI/CD pipelines and the release process for the iOS app

• Collaborate closely with product and other cross-functional partners to define requirements and deliver solutions

• Collaborate closely with product and other cross-functional partners to define requirements and deliver solutions

• Understand and operate in our existing systems and proactively suggest improvements and new ideas based on industry best practices

• Drive incident investigations, post mortems, and retrospectives and effectively advocate for long-term improvements to systems and processes

• Influence within your team for the right engineering improvements to increase quality of our software, testing, and processes

What you bring to the table:

• Multiple years of experience in mobile software development

• Strong problem solving and debugging skills on mobile software products

• Proficiency in either iOS or Android development and some level of comfort with the other.

• Eagerness to learn, grow, and take on new challenges

• Excellent verbal and written communication skills across a range of audiences
  

Bonus points if you have:

• Experience with native Android, native iOS, and cross platform mobile development approaches. Including evaluating tradeoffs

• Track record of influencing adjacent engineering teams of best practices or mobile client needs
  

Compensation, Benefits & Perks:

• 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 LinkedIn 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

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 to work together, in exploring a mutually beneficial partnership.

We provide a transparent setting that gives a comprehensive view of who we are!

In Closing:

At Quizlet, weâre excited about passionate people joining our teamâeven if you donât check every box on the requirements list. We value unique perspectives and believe everyone has something meaningful to contribute. Our culture is all about taking initiative, learning through challenges, and striving for high-quality work while staying curious and open to new ideas. We believe in honest, respectful communication, thoughtful collaboration, and creating a supportive space where everyone can grow and succeed together.â

Quizletâs success as an online learning community depends on a strong commitment to diversity, equity, and inclusion.

As an equal opportunity employer and a tech company committed to societal change, we welcome applicants from all backgrounds. Women, people of color, members of the LGBTQ+ community, individuals with disabilities, and veterans are strongly encouraged to apply. Come join us!

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