Companies performing the code review process

Cybersecurity · HQ: Canada

1Password is password management software. It helps keep sensitive information safe by keeping all passwords.

• Golang
• React
• TypeScript
• MySQL
• +1 more

Databases & tools · HQ: Italy

Agile Lab is developing products in data-intensive environments.

• Node.js
• Java
• Scala
• TypeScript
• +2 more

AI & Machine Learning · HQ: Italy

Altilia is an enterprise AI company that develops automation software. Its Altilia AI Platform lets organizations build custom AI agents with no-code/low-code tools. It is used for document processing, workflow optimization and data intelligence in finance, healthcare, manufacturing and other industries.

• Python
• Java
• React
• TypeScript

Infrastructure · HQ: Portugal

Codacy is a code quality tool. It provides static code analysis and supports major programming languages.

• Scala

Custom software development · HQ: United Kingdom

Collabora is a consultancy specialized in custom Linux and Open Source software development.

• Python
• Django
• Rust
• Java
• +2 more

Infrastructure · HQ: United States

Datadog is a modern cloud monitoring tool with a lot of customizable visualization options.

• Java
• Golang
• JavaScript
• Java EE
• +8 more

Infrastructure · HQ: United States

Docker is an open-source platform that lets you deliver software quickly and separate applications from infrastructure.

• Golang
• C#
• Swift
• React
• +2 more

Custom software development · HQ: United States

Epam is a global consulting company that focuses on product development, digital platform engineering, and design.

• C#
• Kotlin
• Java
• GraphQL
• +11 more

Project management · HQ: United States

Gitbook is a documentation & knowledge management tool for software teams.

• Node.js
• JavaScript
• React
• TypeScript

HR & Recruitment · HQ: Germany

GOhiring is a B2B SaaS for data-driven recruitment decisions. It has been remote-first since 2012.

• Ruby
• Rails
• Ember.js
• React
• +3 more

Infrastructure · HQ: United States

Grafana Labs is a fully remote company working on observability platforms. Its main product, Grafana, is an open-source analytics and visualization web application.

• Golang
• Python
• Ruby
• Java
• +8 more

Travel · HQ: Canada

Hopper develops data-driven solutions that improve the booking of flight tickets and hotels.

• Scala
• Ruby
• Java
• React
• +3 more

HR & Recruitment · HQ: Estonia

Jobbatical is a company that specializes in foreign specialists relocation services.

• Express
• GraphQL
• Node.js
• JavaScript
• +3 more

Operating Systems · HQ: United States

Linux Foundation is an organization focused on developing open-source software, building communities and companies around the Open Source Software idea.

• Serverless Framework
• Node.js
• Golang
• Python
• +5 more

Custom software development · HQ: United States

Lumenalta (formerly Clevertech, renamed in February 2024) is a fully remote digital engineering and custom software consultancy.

• PHP
• Python
• Node.js
• Java
• +5 more

Custom software development · HQ: Switzerland

Luxoft, a DXC Technology company since 2019, does custom software development for automotive, finance, healthcare, telecommunications and other fields.

• Java
• Kotlin
• Spring Framework
• PHP
• +12 more

Maps · HQ: United States

Mapbox provides maps and location data.

• Node.js
• Express
• JavaScript
• C++
• +7 more

Databases & tools · HQ: United States

MongoDB develops a NoSQL database for modern applications.

• Golang
• Python
• Dart
• C#
• +3 more

Custom software development · HQ: Poland

Netguru is a Polish custom software development company. It hires both full-time employees and project-based contractors.

• Python
• Node.js
• Ruby
• Rails
• +11 more

Content management · HQ: Germany

Raidboxes (Münster, Germany) is a remote-first, B Corp-certified, climate-friendly WordPress host. Of its 60 team members, 60% work fully remote, in decentralized teams under holacracy. Benefits include a learning/equipment budget, team gatherings, flexible hours, parental leave and part-time schedules.

• PHP
• Laravel
• WordPress
• TypeScript
• +6 more

E-commerce · HQ: United States

Shopify is an e-commerce platform for online shops across the world.

• Ruby
• Rails
• GraphQL
• Java
• +4 more

Custom software development · HQ: Poland

SoftwareMill is a flat-structured company which develops software for clients from all over the world. The main focus is on Scala, Akka, and Kafka.

• Scala
• Java
• Spring Framework
• Akka
• +7 more

Productivity tool · HQ: Estonia

Toggl is a fully distributed company developing tools for time tracking, project management, and hiring.

• Golang
• Ruby
• JavaScript
• PostgreSQL

Infrastructure · HQ: United Kingdom

Tyk is a cloud-native API gateway and API management tool.

• Golang
• React
• JavaScript
• TypeScript
• +2 more

Infrastructure · HQ: United States

Vercel is a platform for front-end developers for project deployment and collaboration.

• JavaScript
• Next.js
• React
• TypeScript
• +1 more

Automotive & Mobility · HQ: Italy

2hire is a mobility technology company. It develops apps and services for car sharing, rental services and connected vehicle platforms, combining software development with automotive technology.

• Python
• C
• C++
• React
• +1 more

Marketing · HQ: Singapore

Ahrefs is a Ukrainian-founded company that makes SEO tools and runs its own web crawler. It was founded in 2010 and has its HQ in Singapore. It has about 150 team members.

• Scala
• OCaml
• C++
• React

Databases & tools · HQ: United States

Airtable is a web-based relational database in spreadsheet form. It's a no-code tool that can power your application with data.

• Ruby
• Node.js
• JavaScript
• TypeScript
• +1 more

Collaboration · HQ: United Kingdom

Bind is a rich community management platform for Discord.

• JavaScript
• Node.js
• TypeScript
• React
• +1 more

Logistics · HQ: Spain

Cabify is a Spain-based company that provides vehicle rides. Self-employed service providers drive vehicles.

• Golang
• Elixir
• Ruby
• Java
• +7 more

Enterprise Software · HQ: Germany

ChartMogul is an analytics tool for SaaS businesses that integrates subscription analytics with billing systems.

• Ruby
• JavaScript
• Python
• Rails
• +4 more

Collaboration · HQ: United States

Discourse is a 100% open-source forum platform for discussion, community engagement and moderation. Founded in 2013 by Jeff Atwood, Robin Ward and Sam Saffron, it is fully remote across 23 countries and 16 timezones.

• Ruby
• Rails
• Ember.js
• PostgreSQL
• +1 more

Media & Entertainment · HQ: United States

Epic Games is a US-based gaming company, producing and publishing games.

• Node.js
• JavaScript
• C++
• Golang
• +11 more

Marketplace · HQ: United States

Etsy is a global online marketplace where people make, sell and buy handmade, vintage and unique items and gifts. A community has grown around it.

• PHP
• Scala
• MySQL

Marketplace · HQ: United States

Gumroad allows creators to sell their digital products.

• Ruby
• Rails
• JavaScript
• React

Infrastructure · HQ: United States

Honeybadger is a monitoring tool for developers, providing exception, cron, and uptime monitoring.

• Ruby
• Rails
• PHP
• Java
• +4 more

Customer support · HQ: United States

Intercom makes the Intercom helpdesk and the Fin AI customer agent. The company renamed itself Fin in May 2026, and Salesforce acquired it in September 2026.

• Ruby
• Golang
• PHP
• Python
• +1 more

Collaboration · HQ: United States

Kaggle is an online data science and machine learning community. Anthony Goldbloom founded it in April 2010 and Google acquired it in 2017.

• R
• Python
• C++
• TypeScript

Productivity tool · HQ: Poland

Nozbe is a tool for personal & team to-do list management. Inspired by the GTD method.

• JavaScript
• Python
• React
• SQLite
• +4 more

EdTech · HQ: United Kingdom

Potentially is an education technology start-up developing software for universities and colleges. The Potentially platform helps universities to embed competence and skills development of students into the curriculum.

• Kotlin
• Spring Framework
• Java
• PHP
• +3 more

Marketing · HQ: Belgium

Prezly is software for contact management and multimedia story sharing for PR teams.

• PHP
• Symfony
• React
• JavaScript
• +3 more

FinTech · HQ: United Kingdom

Revolut offers global banking, currency exchange, crypto trading and financial tools. It has 2M+ lines of Python code and cloud-native, autoscaling infrastructure.

• Python
• Node.js
• Java
• JavaScript
• +1 more

Design · No office

Sketch is a tool for collaborative user interface design.

• Elixir
• GraphQL
• C++
• Phoenix
• +6 more

Operating Systems · HQ: Germany

SUSE develops its main product, SUSE Linux, an open-source enterprise Linux distribution.

• Python
• Django
• C
• Golang
• +3 more

Marketing · HQ: United States

Talkable is a referral & loyalty marketing platform for e-commerce businesses.

• Ruby
• Rails
• React
• TypeScript
• +2 more

Design · HQ: United States

thoughtbot (founded 2003, Boston) is a fully remote product design/development agency (design sprints, prototyping, UX) with 100 people in 14 countries (Africa, Americas, Europe, West Asia). Staff have 4 client days, Fridays for learning or volunteering, 40-hour weeks and 4+ weeks off.

• Ruby
• Rails
• Golang
• Elixir
• +3 more

Infrastructure · HQ: Germany

Travis is a continuous integration tool that helps developers with building and testing their code. It has multiple integrations and supports the most popular languages and platforms.

• Golang
• Ruby
• JavaScript
• Ember.js
• +1 more