Viator Tech Stack

Online marketplace for 300,000+ bookable travel experiences

Travel Arrangements Needham, Massachusetts 501–1,000 employees Founded 1995 Public Company

Viator operates a large-scale travel marketplace with a polyglot backend (Java, C#, Scala, Python) spanning AWS, Azure, and GCP. The technical roadmap reveals a data and AI-first shift: active projects span RAG systems, generative AI pipelines for product content, and customer segmentation modeling, while pain points around petabyte-scale data, API performance, and automation of data science workflows signal infrastructure constraints. Engineering-heavy hiring (27 of 54 open roles) is concentrated at senior and director levels, suggesting a push to scale internal data capabilities rather than expand the platform's user-facing surface.

Tech Stack 30 technologies

Core StackJava C# C++ GraphQL Kubernetes AWS Scala Swift SwiftUI Salesforce React TypeScript Python RAG Grafana JavaScript MySQL Kotlin Jetpack Compose Cursor SQL iOS Git Service Cloud NoSQL SAST DAST Azure GCP Android

What Viator Is Building

◆Challenges

Optimizing api performance for scalability
Scaling data science capabilities
Expanding distribution network beyond existing partner types
Supplier base reactivation
Continuous cold start
Fragmented journey user behavior
Automation of data science workflows
Petabyte scale challenges
Improving partner experience
Avoiding big company paralysis

▲Active Projects

Next-generation data science tooling adoption
Api integration roadmap development
Customer segmentation modeling
Defining technology roadmaps
Develop scalable genai pipelines for product content
Productionize generative ai models
Prompt tuning and rag systems
Advanced application security measures implementation
Ai adoption across company
Building data products

Hiring Activity

Minimal55 roles · 2 in 30d

Department

Engineering

Data

Product

Sales

Marketing

Security

Support

Research

Seniority

Senior

Mid

Junior

Director

Principal

Intern

Manager

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About Viator

Viator is a public travel marketplace headquartered in Massachusetts that enables customers to discover and book from a catalog of 300,000+ travel experiences—ranging from standard guided tours to niche adventure products. The company sells to leisure travelers and operates a supplier-side network to source inventory. With 501–1,000 employees, Viator is scaling data infrastructure (14 open data roles) and embedding AI across product workflows, while simultaneously addressing operational challenges around supplier reactivation, distribution expansion, and journey-level user experience fragmentation.

HeadquartersNeedham, Massachusetts

Company Size501–1,000 employees

Founded1995

Hiring MarketsPoland, United Kingdom, United States, Portugal

Frequently Asked Questions

What tech stack does Viator use?

Viator's core backend uses Java, C#, Scala, and Python, served via Kubernetes on AWS, Azure, and GCP. Frontend spans React (web) and Kotlin/Jetpack Compose (Android), with iOS using Swift and SwiftUI. Data layer includes SQL, NoSQL, and GraphQL APIs.

What is Viator working on?

Current projects center on generative AI (RAG systems, content generation pipelines, prompt tuning) and data infrastructure (customer segmentation, data science automation, API roadmaps). Also active: advanced application security and next-generation data science tooling adoption.