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Monday, November 21

12:30pm EET

[SLIDES]Tal Kol @koltal - Building a React Native App for 100 Million Users
At Wix.com, we’ve been betting big on React Native. The official Wix app is developed completely in React Native and designed to cater to Wix’s growing userbase of over 100 million users. Production of this scale comes with its set of challenges, especially when using a framework this young.
There’s a difference between fooling around with React Native and making a hardcore app where dozens of developers work together on a single codebase with the purpose of catering to millions of users. Mobile Engineering at Wix.com was willing to make a bet on React Native, and we want to share our experiences and talk about our journey.
Developing quality native apps is challenging in a company like Wix. We have about 200 Javascript front-end developers and only 10-20 native developers (both iOS and Android). The core of the the Wix product is web-based. It’s obvious that in order to bring the product into native mobile form, we have to rely on the existing workforce and leverage the existing skillset. React Native makes this work, as 70% of our code can be in Javascript.
We’ll touch upon different aspects of our dev flow, like: how we break the app into modules which have their own lifecycle (snapshot/RC/GA); manage dependencies for multiple teams in one bundle; use redux in our architecture for maintainability and testability; separate concerns between different dev teams using IPC; perform testing - both unit tests, component testing, e2e automation and QA; move towards continuous integration and delivery; perform deployments and over-the-air updates; do crash/exception monitoring with tools like NewRelic; report to multiple analytics providers events with custom middleware; separate development between native and JS.
Another interesting aspect is how we divide our engineering teams between native developers and JS developers. What does each group do and when do we move tasks from one type of developer to another.

avatar for Tal Kol

Tal Kol

I’m a full-stack developer, specializing in native mobile development for iOS and Android. My latest passion is React Native - which I feel can transform the way we make mobile apps and break development silos. During the last 2.5 years I’ve been leading the architecture for Wix.com’s... Read More →

Monday November 21, 2016 12:30pm - 1:20pm EET
2. Altius

12:30pm EET

Denis Yaremov @yaremov - Offline-first application with Reflex
A client-server applications are locked inside request - response cycle and due to that when connection drops there's no way that application can work. On the other hand if user is allowed changing data while offline, this creates a wide variety of corner cases related to concurrent and conflicting changes. Reflex is a software methodology that provides a simple to understand concept makes offline-first application development simple. Reflex is not only about offline first. This is the architecture that makes web applications more robust, resource friendly and fault-tolerant. Most of the web applications we develop today can be made offline-first.


Monday November 21, 2016 12:30pm - 1:20pm EET
4. Sprint

5:25pm EET

Rob Ashton @RobAshton - Functional Frontends with Elm
I've been working with Elm professionally for most of the year and it has proven itself to be a remarkably simple way to build applications targeted at the web browser in a safe and maintainable manner.

In this talk we'll very quickly skim over the language itself before taking a tour into the common patterns of usage we have discovered as well as some useful libraries that have ended up being an integral part of each of our applications.

This is not a theoretical talk, there will be tangible examples and some discussion of the pitfalls of using this technology - but hopefully together we can help prevent any more raw JS being forced on the world...

avatar for ROB ASHTON


Polyglot Software Developer, id3as
Over a decade of building software in a plethora of languages and technologies, leading teams, travelling around and learning. Now found mostly writing Erlang and Purescript, building distributed media delivery systems for a small b2b company in the UK whilst also developing an ecosystem... Read More →

Monday November 21, 2016 5:25pm - 6:15pm EET
3. Citius