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Author: engineering

Boosting Conversion Rates with Analytics, Design Principles, and UX

Co-Authors: Rohini Pandhi (Product), Jeremy Lubin (Design), Rajat Mittal (Engineering), Rachel Smith (Analytics) Customer experience friction We have big plans for Square Invoices, and we are constantly building new features to help our sellers easily send invoices and get paid fast. A few months ago, we reached an inflection point with the product. Square Invoices had come a long way from where we started and our sellers love the simplicity of our solution. However, as we ramped up thousands of…

Version 2.2.1 of our SDKs Are Now Live – Square Corner Blog – Medium

See what’s new and what we fixed in the latest version of our client libraries. If you want to better understand how we make our SDKs, and how our API specification works with templates to create a complete SDK, check out How Square makes its SDKs. Below we’ll get into what’s new and improved in version 2.2.1 of our SDKs. API specification changes One of the easiest ways to describe the changes in the latest version is to look at…

Netflix Hack Day — Summer 2017 – Netflix TechBlog – Medium

by Daniel Jacobson, Ruslan Meshenberg, Leslie Posada, and Tom Richards About a week ago, Netflix hosted another great Hack Day. The event gives Netflix employees a chance to take a break from everyday work, have fun, experiment with new technologies, and collaborate with new people. Like previous Hack Days, we saw a wide range of ideas, including hacks designed to improve the product, our internal efficiency, and some that are just meant to be fun. We’ve embedded videos below, produced…

Russian Kalashnikov arms maker presents riot control vehicle

In this photo provided by the Kalashnikov company and made available on Tuesday, Aug. 29 2017, Russia’s Kalashnikov company, the maker of the prolific assault rifle, present a formidable crowd control vehicle in Moscow on Friday, Aug. 23, 2017. The Shchit (Shield) vehicle is based on a heavy truck with a broad list of metal attached to its front. It is also equipped with a water cannon and offers protected positions for police officers. (Kalashnikov Company via AP) Russia’s Kalashnikov…

Building a Distributed Work Queue with MySQL and RabbitMQ – Wealthfront Engineering Blog

Many of the daily processes at Wealthfront follow a similar pattern: they perform some operation for each of a large list of items. For example, we might have a daily process that performs some optimization for each active account. This type of process usually operates through some form of work queue, and in the past we’ve been able to use in-memory queues with error reporting or persistent queues operating on a single machine. However, as our client base grows and…

Download Paid Apps and Games for Free

It is a known fact that Play Store does not provide a free of charge distribution. In time, paid apps make you spend a great amount of money. Users have tried to come up with various methods that will get them free apps. iOS users, for example, have used jailbreaking. But that is a risky approach and sometimes it is borderline illegal. Luckily for us, there is another way. The Opera Mobile Store is available. There are alternative apps that…

FCR: Open source command runner for network devices | Engineering Blog | Facebook Code

As Facebook continues to grow, we are constantly looking for ways to improve our operations and drive greater efficiency. Operating at a global scale poses unique technical challenges, particularly in the network environment, where large amounts of data are always on the move. Facebook’s global network has tens of thousands of network devices connected to hundreds of thousands of servers. To keep the network operational, our network devices — the connective tissue linking everything together — need to be continuously…

Engineering Uber’s Self-Driving Car Visualization Platform for the Web

The ATG (Advanced Technologies Group) at Uber is shaping the future of driverless transportation. Earlier this year, the Data Visualization Team—which uses visualization for exploration, inspection, debugging and exposition of data—partnered with the ATG to improve how its self-driving vehicles (cars and trucks) interpret and perceive the world around them. Using some of the latest web-based visualization technologies, the ATG Visualization team built a platform that enables engineers and operators across ATG to quickly inspect, debug, and explore information collected…

Open Sourcing Kafka Cruise Control

Anomaly detectorThe anomaly detector identifies two types of anomalies: Broker failures: i.e., a non-empty broker leaves a cluster, which results in under-replicated partitions. Since this can happen during normal cluster bounces as well, the anomaly detector provides a configurable grace period before it triggers the notifier and fixes the cluster. Goal violations: i.e., an optimization goal is violated. If self-healing is enabled, Cruise Control will proactively attempt to address the goal violation by automatically analyzing the workload, and executing optimization…

How Industry Collaboration Disrupted a DDoS Attack

Introduction On August 17th, 2017, multiple Content Delivery Networks (CDNs) and content providers were subject to significant attacks from a botnet dubbed WireX. The botnet is named for an anagram for one of the delimiter strings in its command and control protocol. The WireX botnet comprises primarily Android devices running malicious applications and is designed to create DDoS traffic. The botnet is sometimes associated with ransom notes to targets. A few days ago, Google was alerted that this malware was…