Sr. Staff Engineer – Partner Platform, APIs & Ecosystem Services

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.

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 Role

We’re seeking a Senior Staff Engineer to lead engineering on Quizlet’s external API platform and Learn

OS plugin architecture. You’ll define integration patterns for partner applications, guide API best practices, and build infrastructure that enables seamless learning workflows across external platforms and AI agents.

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.

In this role, you will:

• Design and implement APIs powering partner experiences and agentic workflows

• Develop MCP and agentic services to build the learn

OS of Quizlet

• Lead cross‑team initiatives to deliver secure, rate‑limited, and discoverable APIs

• Build the infrastructure for Quizlet widgets and embedded experiences in LMSs, productivity tools, or creative apps

• Mentor engineers and influence platform development standards

What you bring to the table:

• 10+ years of engineering experience with large‑scale, multi‑tenant API or developer platforms

• Strong track record designing extensible, secure APIs, SDKs, and plugin systems

• Understanding of agent frameworks like MCP, protocol design, and AI/LLM interoperability

• Experience building platform abstractions and developer enablement layers

• Hands‑on expertise with containerized services, OAuth 2.0, gRPC/REST, and event‑driven systems.

• 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

Compensation, Benefits & Perks

• 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 $212,160 - $294,000, 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‑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!

In Closing

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