Rain Tech Stack

AI financial health platform for employee earned wage access and financial wellness

Financial Services Santa Monica, CA 51–200 employees Founded 2019 Privately Held

Rain operates a fintech platform serving 1,200+ employers and 3.5 million employees with earned wage access, budgeting, and spending analytics. The tech stack is infrastructure-heavy—Kubernetes, Kafka, Terraform, Prometheus/Grafana, PostgreSQL—reflecting a platform handling massive transaction volumes and real-time balance updates. Current hiring is skewed 65% engineering, with senior and lead roles dominating, and the org is actively adopting RAG and LangChain, suggesting AI-driven personalized insights are a near-term product priority.

Tech Stack 74 technologies

Core StackHubSpot Looker Tableau Figma Salesforce AWS Terraform Kubernetes GitLab CI/CD Prometheus Grafana Kafka Helm Python AWS RDS Go PostgreSQL Playwright Docker React Terragrunt AWS EKS Karpenter Bash IAM VPC Chakra UI Appium UIAutomator Espresso+42 more

AdoptingRAG Langchain

What Rain Is Building

◆Challenges

Hyper growth
Scaling design team
Scaling ml function globally
Scaling cloud infrastructure to millions of users
Improving observability and reliability
Automating infrastructure operations
Maximizing performance and scalability
Balancing automation strategy
Improving qa processes
Scaling to support 3.5 million employees

▲Active Projects

Personalized financial insights
Balance forecasting
Credit risk scoring
Scalable cloud infrastructure on aws
Kubernetes cluster management and autoscaling
Ci/cd pipeline improvement
Internal admin portal apis
Ci/cd pipeline automation integration
Ui test automation framework development
Employee balances and debt management system

Hiring Activity

Accelerating50 roles · 50 in 30d

Department

Engineering

Data

Sales

Design

Finance

Marketing

Support

Seniority

Senior

Lead

Mid

Principal

Notable leadership hires: Head of Design, Tech Lead

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About Rain

Rain provides an AI-powered financial wellness platform designed for mid-to-large employers seeking to reduce financial stress and improve workforce retention. The core product layer includes earned wage access (on-demand pay), budgeting tools, spending analytics, and wealth-building features. Rain has processed $4B+ in earned wages across employers including major retail, hospitality, and telecom operators. The company operates a multi-tenant SaaS model, supported by AWS infrastructure, and is scaling to handle transaction and user data volume from 3.5 million employees. Headquarters is in Santa Monica, California; engineering hiring spans North America and Western Europe.

HeadquartersSanta Monica, CA

Company Size51–200 employees

Founded2019

Hiring MarketsUnited States, Portugal, Spain, Romania, Italy, Netherlands, United Kingdom

Frequently Asked Questions

What tech stack does Rain use?

Rain's core stack includes Kubernetes, Kafka, PostgreSQL, Python, Go, React, AWS (EKS, RDS, IAM, VPC), Terraform, Prometheus/Grafana, and HubSpot + Salesforce for enterprise sales and operations.

What is Rain working on?

Current projects include personalized financial insights, balance forecasting, credit risk scoring, Kubernetes cluster autoscaling, CI/CD automation, and test automation frameworks to support 3.5 million employees on the platform.

How this profile is built

Rain'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.