(Updated: May, 2019)
The world’s platform for change
Top Engineering Values
Each team is asked to select, explain, and rank their top 8 values in order of importance.Work/Life Balance
Committed to Personal Growth
Actively Practices Inclusion
Engages with Community
Team is Diverse
Data-Driven
Start-to-Finish Ownership
B2C
PBC / B-Corp
Tech Stack
Ruby on Rails, Elixir, React.js, GraphQL, Node.js, AWS, Redis, Spark & Scala (Data team)
Personal financial training
Top Engineering Values
Each team is asked to select, explain, and rank their top 8 values in order of importance.EQ > IQ
Engages with Community
Flexible Work Arrangements
Fosters Psychological Safety
Impressive Team Members
Open Communication
Promotes from Within
Wears Many Hats
B2C
Remote-OK
Tech Stack
Rails, PostgreSQL, Docker, Heroku
Commerce and Backer Management for Crowdfunding
Top Engineering Values
Each team is asked to select, explain, and rank their top 8 values in order of importance.Committed to Personal Growth
Open Communication
Uses Agile Methodologies
Actively Practices Inclusion
Work/Life Balance
Pair Programs
Customer Comes First
B2B
Self-Funded
Technical Founder(s)
Tech Stack
Ruby (2.5 at the time of writing), Ruby on Rails (5.1), Backbone.js, Postgres, Redis
The best restaurants, for delivery or pickup
Software Engineer, Ruby on Rails
San Francisco, CA
Top Engineering Values
Each team is asked to select, explain, and rank their top 8 values in order of importance.Customer Comes First
Bonded by Love for Product
Start-to-Finish Ownership
Wears Many Hats
Continuous Feedback
Flexible Work Arrangements
Actively Practices Inclusion
Internal Mobility
B2B
B2C
Technical Founder(s)
Tech Stack
Ruby on Rails, JavaScript (React, Redux), iOS (Swift, Objective-C), Android (Kotlin, Java), Ember
Top Engineering Values
Each team is asked to select, explain, and rank their top 8 values in order of importance.Safe Environment to Fail
EQ > IQ
Flat Organization
Open Communication
Actively Practices Inclusion
Flexible Work Arrangements
Committed to Personal Growth
Engineering-Driven
B2B
Technical Founder(s)
Tech Stack
The bulk of our infrastructure is dedicated to distributed processing for machine learning, powered by Apache Hadoop: Hive, Presto, and Spark. Our web app uses React on the frontend and Ruby on Rails on the backend. We’re hosted on AWS.
Leading Software-Powered Freight Forwarder
Top Engineering Values
Each team is asked to select, explain, and rank their top 8 values in order of importance.Fast-Paced Environment
Product-Driven
Work/Life Balance
Open Communication
Wears Many Hats
Promotes from Within
Light Meetings
Impressive Team Members
B2B
Tech Stack
Frontend: React, Relay, Flow, Jest, Enzyme
Mobile: React Native, Apollo
Backend: Ruby on Rails, Postgres, GraphQL, Python, RSpec
CI: GitHub, Buildkite
Infrastructure: AWS, Python
Top Engineering Values
Each team is asked to select, explain, and rank their top 8 values in order of importance.Bonded by Love for Product
Creative + Innovative
Open Communication
Continuous Feedback
Promotes from Within
Committed to Personal Growth
Continuous Delivery
EQ > IQ
B2B
B2C
Technical Founder(s)
Remote-OK
Tech Stack
Backend: Ruby on Rails
Frontend: ReactJS
Urban Air Mobility for the World’s Cities
Top Engineering Values
Each team is asked to select, explain, and rank their top 8 values in order of importance.Pair Programs
EQ > IQ
Continuous Delivery
Product-Driven
Start-to-Finish Ownership
Work/Life Balance
Committed to Personal Growth
B2B
B2C
Technical Founder(s)
Tech Stack
Ruby on Rails, React, React Native (iOS & Android), Postgres, Sidekiq … and lots of testing and CI tools!
Find awesome products designed by independent artists.
Top Engineering Values
Each team is asked to select, explain, and rank their top 8 values in order of importance.Committed to Personal Growth
High Quality Code Base
Continuous Delivery
Team is Diverse
Open Communication
Pair Programs
Heavily Team Oriented
Work/Life Balance
B2C
Tech Stack
Back End: Ruby on Rails, Elixir, Golang
Front End: ReactJS, GraphQL
DevOps: Kubernetes, Heroku (standard)
Cloud: GCP, AWS
Mobile: Swift
Payroll, Benefits, and HR for Modern Companies
Top Engineering Values
Each team is asked to select, explain, and rank their top 8 values in order of importance.Start-to-Finish Ownership
Customer Comes First
Open Communication
Pair Programs
Actively Practices Inclusion
Committed to Personal Growth
Rapidly Growing Team
Work/Life Balance
B2B
Technical Founder(s)
Remote-OK
Tech Stack
Ruby
Rails
Javascript
React
MySQL
Kubernetes
Personal Style Service
Top Engineering Values
Each team is asked to select, explain, and rank their top 8 values in order of importance.EQ > IQ
Continuous Delivery
Cross-Department Collaboration
Promotes from Within
Rapidly Growing Team
Continuous Feedback
Data-Driven
Actively Practices Inclusion
B2C
Remote-OK
Tech Stack
Ruby on Rails
Swift
Postgres
Redis
Memcache
RabbitMQ
AWS
Heroku
Agile Product Development Consultancy
Top Engineering Values
Each team is asked to select, explain, and rank their top 8 values in order of importance.Work/Life Balance
Uses Agile Methodologies
High Employee Retention
Fosters Psychological Safety
Cross-Department Collaboration
Engages with Community
Ideal for Parents
Eats Lunch Together
B2B
Technical Founder(s)
Tech Stack
The majority of our work is in Rails, Node, and Java, but almost everything is up for grabs. The only tech we don’t work in is .NET and PHP.
Software Product Development Firm
Top Engineering Values
Each team is asked to select, explain, and rank their top 8 values in order of importance.Start-to-Finish Ownership
Cutting-Edge Technologies
Uses Agile Methodologies
Pair Programs
Impressive Team Members
Cross-Department Collaboration
Work/Life Balance
Creative + Innovative
B2B
Self-Funded
Technical Founder(s)
Tech Stack
Some popular languages and frameworks we use are: (Web) JavaScript, Python, Go, Java, PHP, Ruby | Node.js, Express, Spring, ReactJS, Redux, Typescript, Rails. (Android) Kotlin, Java | RxJava, React Native. (iOS) Swift, Objective-C | RxSwift, React Native
Mobile App Intelligence
Top Engineering Values
Each team is asked to select, explain, and rank their top 8 values in order of importance.Customer Comes First
Start-to-Finish Ownership
Data-Driven
Flexible Work Arrangements
Friends Outside of Work
Thoughtful Office Layout
Committed to Personal Growth
Open Source Contributor
B2B
Self-Funded
Technical Founder(s)
Tech Stack
Rails, MongoDB, Knockout, Go, AWS
Find yourself outside
Top Engineering Values
Each team is asked to select, explain, and rank their top 8 values in order of importance.Bonded by Love for Product
EQ > IQ
High Quality Code Base
Open Communication
Work/Life Balance
Start-to-Finish Ownership
High Employee Retention
Thoughtful Office Layout
B2C
Technical Founder(s)
Tech Stack
Ruby on Rails, React, Redux, React Native, Sass, Redis, ElasticSearch, Postgres, Heroku, Airflow, Python 3
Marketplace for Local Care Services
Top Engineering Values
Each team is asked to select, explain, and rank their top 8 values in order of importance.Data-Driven
Committed to Personal Growth
Continuous Feedback
Safe Environment to Fail
Promotes from Within
Cross-Department Collaboration
Flexible Work Arrangements
Start-to-Finish Ownership
B2C
Technical Founder(s)
Tech Stack
Ruby 2.3, Rails 4.2+, Rspec React, Jest ES6+, Babel NodeJS 8.1 GraphQL PostgreSQL, MySQL Redis AWS Periscope
Top Engineering Values
Each team is asked to select, explain, and rank their top 8 values in order of importance.Work/Life Balance
Design-Driven
Eats Lunch Together
Committed to Personal Growth
Has Good Beer
Wears Many Hats
Creative + Innovative
Safe Environment to Fail
B2B
Technical Founder(s)
Tech Stack
Ruby on Rails, JavaScript (ES6), HTML+CSS, Sketch App, InVision, Pencil and Paper
Seed Funding for Startups
First Product Designer
San Francisco, CA
Top Engineering Values
Each team is asked to select, explain, and rank their top 8 values in order of importance.Start-to-Finish Ownership
Customer Comes First
Ideal for Parents
Flat Organization
Creative + Innovative
Impressive Team Members
Cross-Department Collaboration
B2B
Technical Founder(s)
Tech Stack
The YC internal software is mostly written in Ruby on Rails and React. We’re hosted on AWS and PostgreSQL. Some experience developing web apps would be helpful, but we don't care if you've used Rails before.
Note: Hacker News is written in Lisp, but Hacker News is run by a separate team. While we don't use Lisp anymore in our internal software, we retain the original motivation for it, and welcome Lisp hackers to join us.
Data Sharing Partnerships for Marketers
Top Engineering Values
Each team is asked to select, explain, and rank their top 8 values in order of importance.Start-to-Finish Ownership
Customer Comes First
Wears Many Hats
Impressive Team Members
High Quality Code Base
Open Communication
Promotes from Within
High Employee Retention
B2B
Technical Founder(s)
Tech Stack
React
Ruby on Rails
Java
AWS
API for Background Checks
Top Engineering Values
Each team is asked to select, explain, and rank their top 8 values in order of importance.Engages with Community
Cross-Department Collaboration
Continuous Delivery
Fast-Paced Environment
Safe Environment to Fail
Rapidly Growing Team
Eats Lunch Together
Team is Diverse
B2B
Technical Founder(s)
Tech Stack
Ruby / Javascript / Python / Golang
Sinatra / Rails / React
MySQL / Mongo
Presto for data warehouse
Docker / Kubernetes for deployment
REST / JSON / gRPC for service communication
QA Testing at the Speed of Development
Top Engineering Values
Each team is asked to select, explain, and rank their top 8 values in order of importance.Flexible Work Arrangements
Continuous Feedback
Open Communication
High Employee Retention
Start-to-Finish Ownership
Engineering-Driven
Promotes from Within
Continuous Delivery
B2B
Technical Founder(s)
Remote-OK
Tech Stack
Ruby, Rails, Grape, Go, Redis, Postgres, QueueClassic, GraphQL, React with redux, KVM, Puppet, Heroku, AWS
Subscription Styling Service for Sizes 14+
Top Engineering Values
Each team is asked to select, explain, and rank their top 8 values in order of importance.Customer Comes First
Data-Driven
High Quality Code Base
Work/Life Balance
High Employee Retention
Uses Agile Methodologies
Rapidly Growing Team
Continuous Delivery
B2C
Remote-OK
Tech Stack
Engineering: Ruby on Rails, React, Postgresql, ElasticSearch
Data: Python + Go, Docker, AWS services (e.g. Kinesis, Lambda, ECS, Fargate…)
Distributed Revision Control and Source Code Management
Top Engineering Values
Each team is asked to select, explain, and rank their top 8 values in order of importance.EQ > IQ
Customer Comes First
Pair Programs
Work/Life Balance
Product-Driven
Flexible Work Arrangements
Fosters Psychological Safety
Creative + Innovative
B2B
B2C
Technical Founder(s)
Remote-OK
Tech Stack
GitHub is a Rails 4 application that is composed of a large monolith and a constellation of services written in Ruby, Go, and a handful of other languages. The app and its services are exposed both internally and externally via a GraphQL API. We primarily rely on MySQL for persistent storage, Redis for temporary storage, and, as you might expect, a lot of git repositories. We rely on Kubernetes for container orchestration.
AI-Powered Analytics for Sales Calls
Top Engineering Values
Each team is asked to select, explain, and rank their top 8 values in order of importance.Customer Comes First
Fast-Paced Environment
Committed to Personal Growth
Open Communication
Wears Many Hats
Rapidly Growing Team
Heavily Team Oriented
B2B
Technical Founder(s)
Tech Stack
Rails for user facing side
React
Python for backend integrations/data science
Social Media SAAS Tool
Software Engineer
San Francisco, CA
Top Engineering Values
Each team is asked to select, explain, and rank their top 8 values in order of importance.Open Communication
Product-Driven
Heavily Team Oriented
Committed to Personal Growth
Fast-Paced Environment
Creative + Innovative
High Employee Retention
B2B
Self-Funded
Technical Founder(s)
Tech Stack
Main technologies:
Ruby on Rails
HTML
CSS
Javascript
AWS SES, S3
Cloud hosted backed with AWS
Winery Fulfillment, Ecommerce, and POS
Top Engineering Values
Each team is asked to select, explain, and rank their top 8 values in order of importance.Open Communication
Start-to-Finish Ownership
Safe Environment to Fail
Cutting-Edge Technologies
Promotes from Within
Friends Outside of Work
Work/Life Balance
Eats Lunch Together
B2B
Remote-OK
Tech Stack
Languages/Frameworks: Angular, Node, Serverless Lambda, Rails, Coldfusion
Databases: MSSQL, Aurora
Cloud Providers: AWS
Planning Platform for Public Transit
Top Engineering Values
Each team is asked to select, explain, and rank their top 8 values in order of importance.Bonded by Love for Product
Continuous Feedback
Customer Comes First
Product-Driven
Engages with Community
Open Communication
Actively Practices Inclusion
Eats Lunch Together
B2B
Technical Founder(s)
Tech Stack
Our main app is a Ruby on Rails API, with a Postgres and PostGIS database and a front-end built using React.js. It’s hosted in Heroku. We also have a variety of services built in Python that are hosted on AWS.
Digital Products for Mobile and Web
Fullstack Developer
Hamburg, Germany
Top Engineering Values
Each team is asked to select, explain, and rank their top 8 values in order of importance.Heavily Team Oriented
Open Communication
Work/Life Balance
Flat Organization
Uses Agile Methodologies
Flexible Work Arrangements
Continuous Feedback
Committed to Personal Growth
B2B
Tech Stack
mindmatters develops software for a variety of customers. Depending on the project specifics we choose mostly Java/Spring Boot, Ruby on Rails, JavaScript, React, Angular 2+, Swift, Objective-C, Android
Modern Pharmacy for Prescription Deliveries
Top Engineering Values
Each team is asked to select, explain, and rank their top 8 values in order of importance.Customer Comes First
Actively Practices Inclusion
Impressive Team Members
Engages with Community
Start-to-Finish Ownership
Cross-Department Collaboration
Fast-Paced Environment
Rapidly Growing Team
B2C
Technical Founder(s)
Tech Stack
React Native, React, Ruby on Rails, Go
Worker-Run Development Shop
Ruby on Rails Developer
Brooklyn, NY
Top Engineering Values
Each team is asked to select, explain, and rank their top 8 values in order of importance.Team is Diverse
Actively Practices Inclusion
Safe Environment to Fail
Open Communication
Work/Life Balance
High Quality Code Base
Pair Programs
Wears Many Hats
B2B
Self-Funded
Technical Founder(s)
Tech Stack
Ruby on Rails, Java, Python, Haskell, Postgres, Redis, AWS, Docker
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