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Fitness22 Tech Stack

Multi-platform fitness apps serving 30M users

Mobile Computing Software Products Center District 11–50 employees Privately Held

Fitness22 operates a portfolio of fitness apps with 30 million users across iOS and Android. The tech stack spans native platforms (Swift, Kotlin) plus Node.js/TypeScript backend and both PostgreSQL and MongoDB, indicating a mature, scaled consumer product. Active pain points around feature parity, user acquisition scaling, and churn suggest the company is balancing engineering velocity against growth pressure—a typical phase for consumer apps moving from product-market fit into retention and monetization.

Tech Stack 19 technologies

Core StackNode.js TypeScript React PostgreSQL MongoDB AWS Docker JavaScript Swift SwiftUI GraphQL Android iOS Objective-C UIKit App Store Connect TestFlight HealthKit Kotlin Multiplatform Mobile

What Fitness22 Is Building

◆Challenges

Feature parity between ios and android
Scaling user acquisition
Reducing churn
Optimizing marketing spend

▲Active Projects

Android app modernization
Growth funnel optimization
Multi-channel acquisition programs
Lifecycle and retention programmes

Hiring Activity

Accelerating5 roles · 2 in 30d

Department

Engineering

4

Marketing

1

Seniority

Mid

2

Senior

2

VP

1

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About Fitness22

Fitness22 builds consumer fitness applications distributed globally with 30 million active users. The product suite is built on native iOS (Swift/SwiftUI/UIKit) and Android (Kotlin), backed by Node.js services and dual-database architecture (PostgreSQL and MongoDB). Current roadmap focuses on three areas: modernizing the Android codebase, optimizing growth channels, and improving user retention through lifecycle programs. The company is based in Israel with an engineering-forward hiring posture (4 engineering roles open, 1 marketing).

HeadquartersCenter District

Company Size11–50 employees

Hiring MarketsIsrael

Frequently Asked Questions

What tech stack does Fitness22 use?

Native iOS (Swift, SwiftUI, UIKit) and Android (Kotlin) front-ends, Node.js and TypeScript back-end, PostgreSQL and MongoDB databases, AWS infrastructure, and Docker containerization.