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Prosper Marketplace Tech Stack

Peer-to-peer lending platform with personal loans, home equity, and credit products

Financial Services San Francisco, CA 201–500 employees Founded 2005 Privately Held
prosper.com LinkedIn

Prosper operates a multi-product lending marketplace built on Python, Java, and GCP, with heavy adoption of Vertex AI and LangGraph for ML-driven credit and risk decisions. The tech stack shape—AI/ML infrastructure layered over core lending engines—reflects an organization shifting from static underwriting toward dynamic, agent-based decision-making. Active hiring skews senior (11 of 16 roles) across product, engineering, and marketing, aligned with projects around portfolio optimization, risk-return trade-offs, and new product launches.

Tech Stack 62 technologies

Core StackPython Java Vertex AI Optimizely HEAP Google Analytics Amplitude Heap Zendesk Kubernetes React React Native TypeScript GraphQL Vite Jest Playwright Cursor Iterable LangGraph GCP SAST DAST IAST PostHog NICE CXone Apollo pnpm Turborepo Detox+32 more

What Prosper Marketplace Is Building

◆Challenges

  • Moving away from rigid, static software
  • Ai agent governance
  • Optimizing risk decisions
  • Balancing growth with risk
  • Aggressive volume targets
  • Scalable growth
  • Optimizing unit economics
  • Improving credit performance
  • Balancing borrowers and investors
  • Identifying conversion bottlenecks

▲Active Projects

  • Engine that translates company knowledge into actions
  • Shared component libraries and cross-platform modules
  • Workflows prioritizing relevancy over frequency
  • Credit card risk strategy
  • A/b testing for risk-return trade-offs
  • Portfolio optimization
  • Launch of new borrowing and investing products
  • Enhanced machine learning targeting models
  • Pr strategy
  • Unified product strategy

Hiring Activity

Accelerating15 roles · 15 in 30d

Department

Product
4
Engineering
3
Marketing
3
Data
1
Design
1
Legal
1
Ops
1
Security
1

Seniority

Senior
11
VP
2
Intern
1
Mid
1
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About Prosper Marketplace

Prosper is a peer-to-peer lending marketplace founded in 2005 and headquartered in San Francisco. The company serves consumers across the credit spectrum through three main product lines: a personal loan marketplace (originated through WebBank), home equity loans and lines of credit, and the Prosper Card (an unsecured credit card issued by Coastal Community Bank). Over the past two decades, Prosper reports having served more than 2 million customers. The platform operates a two-sided market, balancing borrower access to credit with investor returns, and is regulated as an NMLS-licensed marketplace.

HeadquartersSan Francisco, CA
Company Size201–500 employees
Founded2005
Hiring MarketsUnited States

Frequently Asked Questions

What tech stack does Prosper use?

Prosper's primary stack includes Python, Java, GCP, Kubernetes, React, TypeScript, and GraphQL. ML/AI tools include Vertex AI and LangGraph. Analytics: Google Analytics, Amplitude, HEAP, PostHog. Customer experience: NICE CXone, Zendesk. Testing: Jest, Playwright, Detox; security scanning: SAST, DAST, IAST.

Where is Prosper Marketplace headquartered?

San Francisco, California. The company's main office address is 221 Main Street, Suite 300, San Francisco, CA 94105.

How this profile is built

Prosper Marketplace'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.