HackerEarth

Computing accurate skill percentile with DDSketch

An architectural overview of our global benchmarking of candidates

Logging millions of requests reliably with our new data ingestion pipeline

An architectural overview of our request logging pipeline

Building a reliable asynchronous job pipeline

How we leveraged AWS services to build a scalable and a fully managed asynchronous flow

How to set a React Component or dom element as a background image

My internship experience at HackerEarth

Zero to One and Beyond: HackerEarth's journey to Continuous Delivery

The journey to transform HackerEarth's DevOps Culture

How I built my first search component in React

From the vault of my memories before joining HackerEarth

Hassle-free automated assessments

A simplified and automated skill-based test creation

Profiling Django views with Scooby profiler

With scooby profiler, you can debug SQL/Memcache queries while serving requests in Django. The profiler works well in case of AJAX requests.

What you see is what you get!

Integration of WYSIWYG editor in HackerEarth's Recruit platform

Introducing Nuskha

How an internal hackathon led to our own front-end framework

WTF is MVP ?

The MVP architecture blueprint

Sending emails to our half million and growing user community

Email infrastructure at HackerEarth.

Analyzing submissions in real time for social media updates

Story: How we made a real-time app to automate marketing

Beautiful Math Symbols

Supporting LaTex for writing math symbols on HackerEarth

Managing roles and access control in a web application

Manage admin roles and restrict access to features.

HackerEarth Question Library: Stats, Usage Analysis and Health

Feature that helps recruiters to choose the best questions for candidate assessment out of thousands of questions we serve in our library

Logging millions of requests everyday and what it takes

HackerEarth's web servers handle millions of requests every day. These request logs can be analyzed to mine some highly useful insights as well as metrics critical for the business. For example, no. of views per day, no. of views for each product, most popular user navigation flow etc.

Building a powerful comment system

Comments have become an integral part of our website. They are integrated almost everywhere-challenge, practice problem page etc. and soon will be added to few more pages

Post-mortem: The big outage on January 25, 2014

25th January was a rather unfortunate day for us. The monthly challenge - January Jackpot 2014...

Programming challenges, uptime, and mistakes in 2013

HackerEarth hosted more than thousand contests in the year 2013 alone. Out of them, there were more than two...

Introducing CodePlayer - watch your code like a movie

Ever thought of sharing solution of a coding problem in form of a video with someone, to teach them how you implemented the solution. Or, wanted to see...

The HackerEarth Data Challenge

40,000+ programmers use HackerEarth. Everyday, people from all over India and other countries submit code on HackerEarth, solve problems and participate in online coding tests...

HackerEarth API v2: Introducing asynchronous callbacks

We had already published HackerEarth API v1 in February, 2012 at (http://developer.hackerearth.com). The API v1 was synchronous in nature. This means that your request kept hanging until the code...

Continuous Deployment System

This is one of the coolest and important thing we recently built at HackerEarth. What's so cool about it? Just have a little patience, you will soon...

The Robust Realtime Server

This is going to be a long blog post but I promise you will find some interesting piece of engineering here, so stay till the end...

HackerEarth Technology Stack

Description of technology used by us in building HackerEarth.

Analytics for Challenges

Detailed Analytics of data retrieved from challenge

100,000 strong - CodeFactory server

January 2012 was an idyllic time for us. Three of us had just teamed up [to build something...