---
title: "What Tech Stack Does Duolingo Use? | UniqueSide"
description: "Duolingo stack: React, TypeScript, SwiftUI frontend, Python, Scala, Kotlin backend, DynamoDB, PostgreSQL, Redis."
url: "https://www.uniqueside.io/tech-stack/duolingo"
canonical: "https://www.uniqueside.io/tech-stack/duolingo"
type: "tech-stack"
date: "2026-05-22"
lastmod: "2026-05-27"
---

# What Tech Stack Does Duolingo Use?

Gamified language learning mobile app. Below is the stack powering Duolingo, based on widely reported engineering information.

## Duolingo Tech Stack

- **Frontend:** React, TypeScript, SwiftUI
- **Backend:** Python, Scala, Kotlin
- **Database:** DynamoDB, PostgreSQL, Redis
- **Hosting / Cloud:** AWS
- **Notable Tools:** Kafka, Airflow, Kubernetes, Snowflake

## How to Build a Product Like Duolingo

You do not need Duolingo's full stack to launch. A lean, modern stack (Next.js, Node.js, a managed database) covers the core capabilities; adopt heavier infrastructure only as you scale. UniqueSide builds production-ready MVPs on stacks like this in 15 days, from $8,000.

[MVP development service](https://www.uniqueside.io/services/mvp-development) · [Technologies we use](https://www.uniqueside.io/technologies) · [Start a project](https://tally.so/r/wdaQ1N)