Companies testing their code

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

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
• Java
• Golang
• +2 more

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

Cybersecurity · HQ: France

GitGuardian (founded 2017, Paris) builds DevSecOps code security: automated secrets detection and remediation, NHI security and observability. Its team spans France, Europe and the USA (20+ countries), working hybrid (3 remote days/week in France) or fully remote.

• Python
• Django
• Golang
• JavaScript
• +4 more

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

Communication · HQ: Lithuania

MailerLite is an email marketing platform, part of the Vercom family. The team has a Vilnius co-working space and annual workations to Sweden, Bali, Morocco and Panama.

• PHP
• JavaScript
• React
• Vue.js
• +2 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

Automation · HQ: United States

Naologic makes an AI-native ERP for growing manufacturers that connects sales, production, purchasing, inventory and finance in one system.

• Node.js
• Golang
• TypeScript
• Angular
• +2 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

Operating Systems · HQ: United States

Red Hat (IBM subsidiary) is a Linux-oriented organization behind Fedora and RHEL. Office-flex policy allows working from home. WFH stipend and quarterly recharge days. 10,000+ employees.

• Java
• Spring Framework
• Gradle
• Kafka
• +7 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

FinTech · HQ: United States

Stripe is a global online payments processing service for online businesses.

• Ruby
• Scala
• Golang
• GraphQL
• +2 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

Infrastructure · HQ: United States

VMware (part of Broadcom since November 2023) makes software for virtual machines, containers and clusters.

• Golang
• Java
• Kotlin
• JavaScript
• +1 more

Automation · HQ: United States

Zapier (founded 2011) is a 100% remote automation platform with 700+ employees across 38+ countries. Benefits include profit sharing, a $10K annual stipend, bi-annual retreats and sabbaticals.

• Python
• Django
• Node.js
• RabbitMQ
• +6 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

EdTech · HQ: United Kingdom

Aula is a learning experience and communication platform for higher education. Coventry University Group acquired it in January 2022.

• JavaScript
• Node.js
• React
• MongoDB
• +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

Customer support · HQ: United States

Help Scout is a one-stop software for customer service.

• Kotlin
• Ruby
• Golang
• Python
• +8 more

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

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