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Poshmark Tech Stack

Mobile-first fashion resale marketplace with community-driven buying and selling

Retail Apparel and Fashion Redwood City, California 501–1,000 employees Founded 2011 Privately Held

Poshmark operates a mobile commerce platform built on iOS and Android (Swift, Kotlin, Java) where the core tension is scaling transactional infrastructure. The tech stack reveals a mature operational posture: AWS security primitives (WAF, GuardDuty, CloudTrail, Macie, Network Firewall), identity management (Okta, IAM), and backend orchestration (NetSuite, Workday, Boomi). Active projects span real-time data pipelines, fraud detection, and ML productionization—all pointing to data quality and system stability as ongoing constraints. Engineering-heavy hiring (48 of 71 roles) skews senior and staff-level, suggesting architectural scaling work rather than pure feature velocity.

Tech Stack 113 technologies

Core StackKotlin Java AWS Okta CrowdStrike Swift NetSuite Bill.com Salesforce Workday JavaScript UNIX Android Android Studio REST API Jamf Objective-C Xcode iOS IAM AWS WAF GuardDuty CloudTrail AWS Macie Network Firewall SuiteScript Boomi Dell Boomi Celigo SQL+82 more

What Poshmark Is Building

◆Challenges

Maintaining complex web-scale systems
Automating large-scale operations
Real-time access to quality data
Productionizing ml models
Identifying infrastructure gaps
Scaling high-traffic marketplace
Handling terabytes of data daily
Reducing technical debt
Scalability and stability of data pipelines
Performance tuning

▲Active Projects

Alerts and dashboards
Roll-out and deployment of new product features
Comms functionality projects
Infrastructure improvement projects
Personalization
Fraud detection
Real-time and batch data pipelines
Ios mobile application development
Automation tools for deployment
Secure aws architecture design and implementation

Hiring Activity

Steady70 roles · 30 in 30d

Department

Engineering

48

Data

7

Security

5

Marketing

2

Ops

2

Support

2

Product

1

Sales

1

Seniority

Senior

30

Mid

13

Staff

8

Junior

7

Lead

5

Director

2

Manager

2

Intern

1

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About Poshmark

Poshmark is a fashion resale marketplace operating a mobile-native social commerce experience where users buy and sell apparel and accessories. The platform operates at scale: real-time transaction processing, handling terabytes of data daily, and supporting millions of concurrent marketplace participants. Operationally, the company runs dual engineering centers in the United States and India, with active infrastructure modernization and fraud-prevention systems. Revenue flows from transaction volume rather than direct seller subscription, with earnings distribution to seller community as a core value proposition.

HeadquartersRedwood City, California

Company Size501–1,000 employees

Founded2011

Hiring MarketsUnited States, India

Frequently Asked Questions

What is Poshmark's tech stack?

Mobile-first: iOS (Swift, Objective-C, Xcode) and Android (Kotlin, Java, Android Studio). Backend: AWS (with WAF, GuardDuty, CloudTrail, Macie, Network Firewall), REST APIs, SQL. Enterprise systems: NetSuite, Salesforce, Workday, Boomi integration platform.

What is Poshmark working on?

Core projects include real-time and batch data pipelines, fraud detection, iOS app development, personalization, infrastructure improvements, and ML model productionization. Challenges center on scaling transaction systems and data pipeline stability.