Duolingo Tech Stack

Gamified language-learning app with ad-driven and subscription monetization

Software Development Pittsburgh, PA 501–1,000 employees Founded 2011 Public Company

Duolingo operates a mobile-first language platform at scale—501–1,000 employees, public company, highest-grossing education app globally. The tech stack (iOS/Android, Python, Go, Kubernetes, PostgreSQL, AWS/GCP) reflects a mature mobile infrastructure with distributed compute. Current hiring skews engineering-heavy (30 roles), followed by product (21) and marketing (19), while active projects and pain points reveal dual-revenue focus: scaling direct ad sales and improving subscription conversion, with parallel investment in core learning features, short-form content, and international ecommerce presence.

Tech Stack 68 technologies

Core StackSwift Java Kotlin Python Go Docker Kubernetes Nomad MySQL PostgreSQL Ansible Puppet Terraform CloudFormation Linux AWS Cursor AppLovin iOS iOS SDK Bazel Mesos Android SDK Android Chef rkt GCP Alibaba Cloud ChatGPT Unity+36 more

AdoptingJetpack Compose GitHub Actions Tuist

What Duolingo Is Building

◆Challenges

Scaling direct advertising revenue
Ensuring reliability and scalability
Scaling merchandising internationally
Higher-quality ad formats
Reducing toil
User acquisition and retention
Improving subscription purchase convenience
Accelerating test growth in india
Grow userbase and retention
Reducing time to launch

▲Active Projects

Duolingo ads
Tailored sourcing strategies
Ecommerce strategy
Global ecommerce presence
Insights pipeline
Core learning experience features
Short-form content strategy
User experience across features within the duolingo language app
Build community function from scratch
Launch initiatives to grow participation

Hiring Activity

Accelerating120 roles · 60 in 30d

Department

Engineering

Product

Marketing

Design

Sales

Ops

Research

Seniority

Senior

Director

Lead

Staff

Manager

Mid

Intern

Junior

Notable leadership hires: Learning Design Director, Head of Commerce, Head of Academy, Creative Director

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About Duolingo

Duolingo is a mobile language-learning platform offering bite-sized, game-like lessons. The app is free-to-play with monetization through ads and subscriptions. The company serves language learners globally and also offers language proficiency assessment. Founded in 2011 and headquartered in Pittsburgh, PA, Duolingo went public and operates at scale with infrastructure spanning AWS, GCP, and Alibaba Cloud. Current product development spans core learning experience, community features, short-form content, and international ecommerce strategy. The org is hiring across nine countries (US, Japan, China, UAE, India, UK, Mexico, Peru, Turkey), with particular growth focus in India.

HeadquartersPittsburgh, PA

Company Size501–1,000 employees

Founded2011

Hiring MarketsUnited States, Japan, China, United Arab Emirates, India, United Kingdom, Mexico, Peru

Frequently Asked Questions

What tech stack does Duolingo use?

Core stack: Swift, Kotlin, Java, Python, Go; infrastructure: Kubernetes, Docker, AWS, GCP, Alibaba Cloud; data: PostgreSQL, MySQL; mobile: iOS/Android SDKs. Actively adopting Tuist, Jetpack Compose, GitHub Actions.

Where is Duolingo headquartered?

Pittsburgh, PA. The company is hiring across nine countries: US, Japan, China, UAE, India, UK, Mexico, Peru, and Turkey.