Sr. iOS Engineer

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

🌎 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

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.

We're looking for a Senior Engineer to join UX Foundations. You'll split your time between owning core iOS app layers — shared libraries, SDKs, security, CI/CD, and the release process — 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, you’ll collaborate closely with engineers, designers, and product managers to deliver high-quality mobile experiences. You’ll have the opportunity to influence technical direction, contribute to architecture decisions, and mentor other engineers while driving projects from ideation through release. We’re 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.

We’re happy to share that this is an 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.

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 — from design through release — 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

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

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

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

At Quizlet, we’re excited about passionate people joining our team—even if you don’t 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.”

Quizlet’s 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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