Iakov Markov

We use Mandrill to handle all transactional emailing - from welcome letters to password reminders to notifications. Mandrill

Selenium is a great way to automatically test if a build is sane and can be deployed. Selenium

Our UX designers swear by this tool, that gives us valuable information on how our users interact with the app. Thanks to FullStory, we've implemented A/B testing that helps us to fine-tune and polish our interfaces to perfection. FullStory

GTM is used to monitor marketing campaign effectiveness and measure other marketing-related data. Google Tag Manager

Sentry is a very powerful error reporting tool. We use it both on front-end and back-end of Ataccama One. It proved to be invaluable in providing insights on our errors - what caused it, what user did before the error occured, stack trace, release tracking and more. Sentry

Slack is used as a company-wide communication tool. In addition, we've got a few channels set up to notify developers about build failures, thrown exceptions on production servers and stuff like that. Slack

Our JS test library of choice, chosen primarily for it's small footprint, ease-of-use and ability to produce TAP results. Tape

Our state management library of choice. Redux has a simple concept, but it's flexible enough and it's React binding library, react-redux, contains a lot of performance-optimized code to make the most out of this combo. Redux.js

A super-flexible library to manage side-effects built on ES6 generators, redux-saga is used in One to describe async event flow using imperative code style. Really powerful 'escape hatch' from world of pure reducer functions. The ability to easily test sagas is a cherry on top. redux-saga

ES6 brings some sweet features to the language. Our favourites are lambda-expressions, block-scoped consts and lets and Promises. ES6