FinTech · HQ: United States · 5,000 to 10,000 employees
Stripe is a global online payments processing service for online businesses.
FinTech · HQ: United States
Block, Inc. (formerly Square) is a US-based digital payment and financial services company. The parent company rebranded to Block in 2021, and Square remains the brand for the seller business. Block also includes Cash App and Tidal.
Python 
Node.js 
Golang 
FinTech · HQ: United States
Expensify's payments app helps individuals and businesses manage expenses and financial workflows. Offices are in SF, Portland, London and Melbourne.
PHP 
C++ 
JavaScript 
FinTech · HQ: United States
FloQast is an AI-powered accounting platform. It automates accounting workflows and the financial close, and handles enterprise compliance.
Golang 
MongoDB 
FinTech · HQ: United States
Flywire is a global payments company for education, healthcare, travel and B2B. It has 1,400+ employees (FlyMates) from 40+ nationalities in 15 offices, and current roles are hybrid. Engineering uses microservices and continuous delivery.
React 
Ruby
Scala
GraphQL