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Category: Mechanical Engineering

Change of Website Domain for My Official Work Website

The 3rd quarter of 2018 saw that Universiti Teknologi Malaysia (UTM), my work place for the past 10 years experienced a major restructuring in its organization. I was previously in the Faculty of Chemical and Energy Engineering (FCEE), but after the synergy restructuring, it is now no longer a faculty, but a school. It is now known as the School of Chemical and Energy Engineering (SCEE).  What happen was all 6 engineering faculties were merged into 1 huge engineering faculty,…

Running Apache Airflow At Lyft – Lyft Engineering

By Tao Feng, Andrew Stahlman, and Junda Yang ETL is a process to extract data from various raw events, transform them for analysis and load the derived data into a queryable data store. Data engineers and scientists at Lyft build various ETL pipelines which run at a different set schedule to gain insight on topics ranging from the current ridesharing market to the experiences for driver/passenger, etc. A reliable, efficient, and trustworthy workflow management system is crucial to make sure…

Year in Review: 2018 Highlights from the Uber Engineering Blog

With new content every week, our blog showcases the technologies—and the people behind them—that power the Uber platform. In 2018, we published articles on topics spanning the breadth and depth of our technical stack, from a series detailing our driver app rewrite (codenamed Carbon) to our Michelangelo machine learning platform. We shed light on the experiences and backgrounds of our technologists, including our Q&A with site reliability engineering manager and UberHUE member, Sumbry, and our profile from fabric weaver turned…

Nevergrad: An open source tool for derivative-free optimization

Most machine learning tasks — from natural language processing to image classification to translation and many others — rely on derivative-free optimization to tune parameters and/or hyperparameters in their models. To make this faster and easier, we have created and are now open-sourcing a Python3 library called Nevergrad. Nevergrad offers an extensive collection of algorithms that do not require gradient computation and presents them in a standard ask-and-tell Python framework. It also includes testing and evaluation tools. The library is…

100 years ago, airmail took flight

French aviator Jean Mermoz was one of the pioneers of Aeropostale On December 25, 1918 a daring French industrialist launched the world’s first ever airmail service, flying between the southwestern French city of Toulouse and Barcelona in northeastern Spain. It was the beginning of an adventure which would soon see pioneering pilots from the company, best known as Aeropostale, delivering letters to Morocco, Senegal in Africa and later to Latin America. The plan for a regular airmail service was…

Zstandard: How Facebook increased compression speed

Two years ago, Facebook open-sourced Zstandard v1.0, a landmark data compression solution that offers best-in-kind performance. Since then, we’ve released a variety of enhancements and advanced capabilities. While some of the improvements, such as faster decompression speed and stronger compression ratios, are included with each upgrade, others need to be explicitly requested. This post will walk through these new features and how they’ve delivered a second round of benefits at Facebook. The initial promise of Zstandard (zstd) was that it…

Year in Review: 2018 Highlights from Uber Open Source

By Brian Hsieh The diversity of Uber’s open source offerings speaks to the complexity of our technology stack and the business problems we use these projects to solve. Open source also gives our engineers, data scientists, and researchers the opportunity to further build out their projects for the benefit of the broader technical community. In this spirit, Uber Open Source developed our mission statement: enabling collaboration through open source. From joining The Linux Foundation as a Gold member to releasing…

On-Prem Automation and Our Path to a Hybrid Environment – Wayfair Tech Blog

Wayfair’s software engineering history demonstrates a common theme throughout it’s time: It moves fast and is a core trait of our business. To create and support the right foundations, we need our infrastructure to move faster than our ideas, and this is especially true for our hybrid environment objectives in 2019 and beyond. Hybrid for Wayfair means using Google Cloud Platform (GCP) to deliver extra capacity to our customer-facing website and related systems, while still supporting and maintaining our on-premise…

What it’s like to interview at Pinterest – Pinterest Engineering – Medium

Justin Mejorada-Pier | Software Engineer, Analytics Platform Tech Lead Interviews have traditionally been thought of as an unpleasant but necessary experience. Candidates often find them stressful and many come in having had poor interview experiences in the past. However, interviews are the clearest opportunity for companies to articulate and demonstrate their company values, culture, and approach. It’s counterproductive for a candidate’s first live interaction with a company to risk being an unpleasant experience, stress them out with a tricky probability…

Beyond “How May I Help you? “ – Airbnb Engineering & Data Science – Medium

How we used sequence models and LSTM networks to suggest responses for our customer service agents By Xin (Cindy) Chen, Mengting Wan At Airbnb, we serve a global community of hosts and guests. An essential part of Airbnb’s business is to provide high quality customer service at scale. Live chat is one of our customer support channels, where customers can chat with our customer service agents to resolve their issues. It is time-consuming for agents to repeatedly type or copy and…