OfferUp Tech Stack

Mobile marketplace for local buying, selling, and services

Technology, Information and Internet Bellevue, Washington 201–500 employees Founded 2011 Privately Held

OfferUp operates a consumer mobile marketplace connecting buyers and sellers across used goods, jobs, services, and rentals. The tech stack reveals infrastructure maturity—Java microservices on AWS, Kubernetes orchestration, BigQuery + Databricks for analytics—paired with emerging AI tooling (LangChain, LangGraph, Gemini, SageMaker). Active projects around production RAG pipelines and agentic workflows signal a shift toward AI-driven discovery and seller automation, while simultaneous investment in legacy system replacement and microservices redesign suggests the company is refactoring core infrastructure to handle scale.

Tech Stack 29 technologies

Core StackJava AWS Stripe Shopify Cursor LangChain ADP Node.js React React Native JavaScript TypeScript GraphQL webpack Python Terraform Kubernetes Databricks SageMaker BigQuery NetSuite LangGraph Culture Amp Gemini Bower DSP Concur

What OfferUp Is Building

◆Challenges

Replacing legacy systems
High traffic services
Scaling real-time services
Reducing friction for new business customers
Scaling high-throughput microservices
Reducing fraud
Optimizing performance management cycles
Engagement survey implementation
Solving real problems for millions of users

▲Active Projects

Highly scalable real-time microservices
Legacy system replacement
Technical strategy development
Offerup business portal development
Self-serve acquisition flywheel
Technical roadmap definition
Microservices design and operation
Experimentation strategy and a/b testing
Production rag pipelines for intelligent discovery
Agentic workflows for marketplace automation

Hiring Activity

Accelerating6 roles · 5 in 30d

Department

Engineering

Product

Data

Seniority

Mid

Principal

Staff

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About OfferUp

OfferUp is a mobile-first C2C marketplace founded in 2011, based in Bellevue, Washington, and serving millions of users across the United States. The platform spans multiple verticals: secondhand goods, local jobs, professional services, and home rentals, all accessible through a mobile app designed for local discovery. The company operates with a mid-market team (201–500 employees) structured around engineering, product, data, and business operations. Current hiring across engineering, product, and data roles—with emphasis on mid-level and principal-level hires—reflects active scaling of technical infrastructure and experimentation capabilities.

HeadquartersBellevue, Washington

Company Size201–500 employees

Founded2011

Hiring MarketsUnited States

Frequently Asked Questions

What tech stack does OfferUp use?

OfferUp runs on Java microservices deployed on AWS with Kubernetes, uses React and React Native for mobile, and relies on BigQuery, Databricks, and SageMaker for data and ML. Recent additions include LangChain, LangGraph, and Gemini for AI-driven features.

What is OfferUp working on?

OfferUp is building production RAG pipelines for intelligent discovery, agentic workflows for seller automation, and redesigning core microservices for real-time operations. The company is also replacing legacy systems and developing a self-serve acquisition flywheel for business sellers.

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How this profile is built

OfferUp'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.