EarnIn Tech Stack

Earned wage access platform with payroll, savings, and credit tools

Financial Services Mountain View, California 201–500 employees Founded 2012 Privately Held

EarnIn operates a consumer fintech platform centered on immediate wage access, now expanding into payroll-as-a-service and building AI-powered development tooling. The stack spans Java, Kotlin, Python, and Kafka across AWS/GCP/Azure, with active adoption of Kotlin Multiplatform and RAG — indicating a shift toward cross-platform mobile efficiency and LLM-driven features. Engineering dominates the hiring mix (59 roles), reflecting the complexity of real-time financial workflows and the platform's scale challenges around ML reliability and high-throughput processing.

Tech Stack 93 technologies

Core StackJava Kotlin Scala Spring AWS Python PostgreSQL MySQL Kafka Kubernetes Jetpack Compose Intune TensorFlow PyTorch SageMaker Databricks Spring Boot GCP Azure iOS AWS SNS/SQS AWS Kinesis Android RxJava Jetpack XML macOS Windows Jamf Pro VMware Workspace ONE+60 more

AdoptingRAG Kotlin Multiplatform MCP

What EarnIn Is Building

◆Challenges

Enhancing compliance program
Reliability of ml platform
Scaling platform
Time-critical financial workflows
High throughput and real-time conditions
Performance optimization
Reducing fragmentation
Improving conversion
Reducing friction in funnel
Streamline payroll management

▲Active Projects

New payroll saas product
Money platform
Payroll and tax processing engines
Ai-powered development tools adoption
Scalable backend features and rest apis
High-impact web pods
Earnin’s cheddar design system
End-to-end user experience for product verticals
Growth funnel backend services
Automation and testing frameworks

Hiring Activity

Steady120 roles · 40 in 30d

Department

Engineering

Product

Finance

Data

Support

Design

Marketing

Seniority

Senior

Mid

Staff

Director

Lead

Manager

Junior

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About EarnIn

EarnIn is a fintech platform that allows salaried and hourly workers to access earned wages on-demand rather than waiting for traditional paydays. Founded in 2013 and based in Mountain View, the company has served 3.8 million users and facilitated over $15 billion in earnings access. The product combines earned wage access with adjacent tools: credit monitoring, automated savings accounts, and low-balance protections. EarnIn partners with Evolve Bank & Trust for deposit and card issuance. The company is actively diversifying into payroll processing engines and expanding its backend services to support multiple product verticals, while operating at a technical scale that demands reliable ML systems, high-throughput transaction handling, and compliance automation.

HeadquartersMountain View, California

Company Size201–500 employees

Founded2012

Hiring MarketsMexico, United States, India, Canada, Thailand

Frequently Asked Questions

What tech stack does EarnIn use?

EarnIn runs Java, Kotlin, and Scala on Spring and Spring Boot, with Python for data/ML work (TensorFlow, PyTorch, SageMaker, Databricks). Infrastructure spans AWS, GCP, and Azure. Mobile apps use iOS, Android, Jetpack Compose, and RxJava. Streaming and async processing use Kafka and AWS Kinesis.

What is EarnIn working on?

Active projects include a new payroll SaaS product, payroll and tax processing engines, scalable backend APIs, AI-powered development tooling, a design system (Cheddar), and growth funnel services. Key challenges include ML platform reliability, real-time financial workflow performance, and platform scaling.