Company profile

Underdog Tech Stack

Fantasy sports, prediction markets and sports media app for U.S. fans

Spectator Sports Brooklyn, NY 201–500 employees Founded 2020 Privately Held

Underdog runs consumer fantasy and prediction-market apps on a mobile-first stack (React Native, Swift, Kotlin) backed by real-time streaming via Kafka, Flink and Kinesis. Active work on regulatory reporting infrastructure and fraud detection points to compliance pressure as the product scales. Hiring is accelerating and marketing-led, with data and ops close behind, while dbt adoption signals investment in the analytics layer.

Tech Stack 97 technologies

Core StackSlack React Native Ruby Monday.com dbt Kotlin Jetpack Compose Datadog Amplitude Swift SwiftUI Firebase SageMaker Kubeflow Vertex AI AWS Apache Spark Looker Python Kafka Apache Flink Terraform Android Studio Espresso Xcode UIKit Xcode Cloud Proxyman XCTest AWS Kinesis+66 more

Adoptingdbt

What Underdog Is BuildingChallenges and projects from their job posts

◆Challenges

Fraud detection gaps and false positives
Speed and reliability at scale
Critical issues in the React Native client
Scaling VIP program operations and engagement
High-volume creative production workflow inefficiencies

▲Active Projects

Regulatory reporting infrastructure
Fraud program development and capability shipping
Simulation-based predictive and pricing models across sports
Core betting experience and bet history feature
AI-assisted model development workflows
Entry placement and tracking

Hiring Activity

Accelerating15 roles · 15 in 30d

Department

Marketing

Data

Ops

Design

Engineering

Finance

Sales

Security

Seniority

Senior

Mid

Junior

Manager

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About Underdog

Underdog is a Brooklyn, NY-based sports company founded in 2020 that builds consumer products for U.S. sports fans. Its offering spans fantasy sports games, prediction markets, and a media network featuring former athletes, coaches and analysts. The company employs 201–500 people and is privately held. Engineering covers native iOS and Android clients alongside a React Native app, with infrastructure on AWS managed through Terraform. Hiring is concentrated in the United States.

HeadquartersBrooklyn, NY

Company Size201–500 employees

Founded2020

Hiring MarketsUnited States

Frequently Asked Questions

What tech stack does Underdog use?

Underdog uses React Native, Swift, Kotlin and Ruby for its apps, AWS with Terraform for infrastructure, Kafka, Flink and Kinesis for streaming, and dbt, Looker and Amplitude for analytics.

Is Underdog hiring?

Yes, hiring is accelerating, led by marketing with additional demand in data and operations, plus roles in design, engineering, finance, sales and security, all in the United States.

What is Underdog working on?

Current projects include regulatory reporting infrastructure, a fraud program, the core betting experience, a bet history feature, and simulation-based pricing models across multiple sports.

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How this profile is built

Underdog's technology stack, projects, and hiring signals are inferred from public hiring and company data — career pages, public listings, and company web presence — then clustered and de-duplicated. Figures are estimates that refresh over time. Read our full methodology →

This is not an official vendor or customer list. It is a technology-adoption signal inferred from public data, intended for B2B research.