Resources

There are tons of great resources all over the internet. I've bookmarked hundreds of URLs and this page is my categorized collection of the references and free tools I've found to be helpful. If you're reading this and have something to add or find a dead link please send me a note. I'm continuing to add to this over time.

API Services | Career Management | Cloud Computing | Computer Science | Data Engineering | Data Science | Datasets | Data Visualization | MarTech | Programming | Software Development | Web Applications | Website Tools


Career Management


3 Data Career Paths Decoded

Helpful article that compares and contrasts the role of a data analyst vs. data scientist vs. data engineer.
blog.udacity.com/data-analyst-vs-data-scientist-vs-data-engineer

CodeFights - Practice for Technical Interviews

Technical interviews are tough. CodeFights, which is best known as a competitive coding and skill-based recruiting platform, helps developers practice for these interviews through a free platform that offers study topics and practice questions.
codefights.com/interview-practice

Data Flair Interview Questions

Frequently asked interview questions, by category. Each question is accompanied by answers shared by industry experts.
data-flair.training/interview-questions

GeeksforGeeks

A Computer Science portal for geeks. It contains computer science and programming articles, quizzes, and practice/competitive programming questions. It also has a large database of company-specific interview questions.
www.geeksforgeeks.org

Git Showcase

Free portfolio site that allows developers to easily feature projects from their GitHub repositories.
gitshowcase.com

Google Cloud Certification - Data Engineer

A Google Certified Professional - Data Engineer enables data-driven decision making by collecting, transforming, and visualizing data. To earn this certification you must pass the in-person exam. This webpage offers a collection of useful training resources and reference materials aimed at achieving this certification.
cloud.google.com/certification/data-engineer

Hackterms

At some point in your professional coding career, you’re going to feel stupid when you forgot some simple term. Hackterms is a crowdsourced dictionary of coding terms and serves as a sort of wiki for coding language. Programming is full of jargon and self-inflicted nomenclature wounds. Hackterms helps by returning plain-speak explanations for these.
www.hackterms.com

IBM Certified Data Engineer - Big Data

This certification is intended for big data engineers. To attain IBM Certified Big Data Engineer status, candidates must pass one test.
ibm.com/certify/certs/50001501

InterviewBit

Learn and Practice on almost all coding interview questions asked historically and get referred to the best tech companies.
www.interviewbit.com

Interview Cake

Free practice programming interview questions. Interview Cake helps you prep for interviews to land offers from your dream companies.
interviewcake.com

Interviewing.io

Interviewing.io is a platform where people can practice technical interviewing anonymously with engineers from top companies.
interviewing.io

Learn To Code

Programming and computer science are becoming more popular than ever. As a result, there are an increasingly huge number of resources and tutorials being produced for beginners who want to learn to code, ranging from books to online tutorials to interactive websites to massive open online courses (MOOCS). This can be overwhelming for beginners – there are almost too many resources available, and it’s difficult to figure out where to start. This page offers a curated list of resources for both new developers and developers looking to advance their skills and learn a new language/framework.
ashleymcnamara.github.io/learn_to_code

Pramp

Practice mock interviews and coding questions online, with peers, for free. Great practice for preparing for interviews and ultimately landing your dream tech job.
www.pramp.com

Skills Index

Undoubtedly you’ve heard about the skills gap challenges in the U.S. economy. Using select data from LinkedIn and [email protected]’s proprietary analysis, the [email protected] Skills Index takes a look at supply vs. demand around specific skill sets across top industries and provides actionable recommendations for getting up to speed.
skillsindex.com

TechPizza

This site aggregates information around upcoming data-related Meetups and also gives users the ability to browse for slides, code, and video from Meetup tech groups around the world.
techpizza.org

TestDome

For developers, this site offers public technical tests and practice interview questions. If you score well you can get free certificates to display on your online profiles.
testdome.com

Things You Need to Know in a Programming Interview

This article cover general tips on how you, the interviewee, can impress your interviewer during a coding session and land your dream job.
medium.freecodecamp.org/most-important-things-to-know-programming-interview


Cloud Computing

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AWS Explained: The Basics

A nice introductory primer for getting started in AWS and cloud computing in general.
inqdo.com/aws-explained-the-basics


Computer Science

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Big-O Notation Cheat Sheet

This webpage covers the space and time Big-O complexities of common algorithms used in Computer Science.
bigocheatsheet.com

Coding Interview University

At a time where technology is outpacing the ability of many universities to update their course curriculum, many aspiring software engineers are seeking alternative forms of the education required to get a job. This is a popular complete computer science multi-month study plan to become a software engineer.
github.com/jwasham/coding-interview-university

ComputerScience.org

Great collection of resources for exploring different careers in tech.
computerscience.org

CS Algorithm Notes

Set of CS lecture notes, which you can use to teach yourself algorithms.
web.stanford.edu/class/archive/cs/cs161

CS Playground React

A simple in-browser JavaScript sandbox for learning and practicing algorithms and data structures.
cs-playground-react.surge.sh

Intro to Computer Science Terminology

A complex definition: Computer Science is the study of information technology, processes, and their interactions with the world.
codeburst.io/intro-to-computer-science-terminology

Teach Yourself Computer Science

If you’re a self-taught engineer or bootcamp grad, you owe it to yourself to learn computer science. This guide offers the nine subjects you should learn with the best book or video lecture series for each subject. Ideally this list can be revisited throughout your career.
teachyourselfcs.com


Data Engineering

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7 Steps to Understanding NoSQL Databases

The term NoSQL has come to be synonymous with schema-less, non-relational data storage schemes. NoSQL is an umbrella term, one which encompasses a number of different technologies. This article provides newcomers an overview of NoSQL technologies and architectures it includes.
kdnuggets.com/seven-steps-understanding-nosql-databases.html

Awesome Data Engineering

A curated list of data engineering tools for software developers.
github.com/igorbarinov/awesome-data-engineering

Beginner’s Guide to Big Data Terminology

Walkthrough on some of the common lingo of big data, such as DaaS and Neural Networking.
dataconomy.com

OLAP Cubes

A nice intro guide on what these are and why they are used.
olap.com/learn-bi-olap/olap-bi-definitions/olap-cube

Self-Study List for Data Engineers and Aspiring Data Architects

With the explosion of “Big Data” over the last few years, the need for people who know how to build and manage data-pipelines has grown. This article takes a look at the sought after job skills for these areas and how you can go about learning these.
blog.treasuredata.com

Transactional vs. Analytical Processing

Good cross-comparison between OLTP and OLAP systems.
datawarehouse4u.info/OLTP-vs-OLAP

What Does a Data Engineer / Data Architect Do?

This post explores the path of becoming a data engineer / big data architect.
edvancer.in/engineering-fresher-get-into-analyticspart-2

What Is Big Data?

Analyzing lots of data is only part of what makes big data analytics different from previous data analytics. This article delves into what those other aspects are.
infoworld.com/article/what-is-big-data-everything-you-need-to-know.html

What Is ETL?

ETL is shorthand for the extraction, transformation, and loading process used in most data movement operations. This article provides a nice overview for those wanting to understand the basics around these phases.
timmitchell.net/what-is-etl


Data Science

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Best Practices for ML Engineering

This guide is intended to help those with a basic knowledge of machine learning get the benefit of best practices in machine learning. If you have taken a class in machine learning, built, or worked on a machine-learned model, then you have the necessary background to read this document.
martin.zinkevich.org/rules_of_ml.pdf

Data Mining in Python: A Guide

Data mining is the process of discovering predictive information from the analysis of large databases. This guide provides an example-filled introduction to data mining using Python, one of the most widely used data mining tools - from cleaning and data organization to applying machine learning algorithms.
springboard.com/blog/data-mining-python-tutorial

Handy Python Libraries for Formatting and Cleaning Data

Data scientists spend a lot of time cleaning messy data. This is a list of Python libraries that help make data more orderly and legible - from styling DataFrames to anonymizing datasets.
blog.modeanalytics.com/python-data-cleaning-libraries

Kaggle

Offers a means of learning data science through both public and private competitions.
kaggle.com

KDnuggets

This website looks like its design hasn’t changed since the 90s, but it is home to lots of great content on business analytics, big data, data mining, and data science.
kdnuggets.com

R or Python for Data Science?

This is a nice blog post on opendatascience.com that digs into the differences/advantages of using either R or Python for performing data science tasks.
opendatascience.com/blog/r-or-python-for-data-science

RegexOne

Regular expressions are extremely useful in extracting information from text such as code, log files, spreadsheets, or even documents. This site offers an interactive tutorial and practice exercises to help you learn them.
regexone.com

rOpenSci

Open source R packages that allow access to data repositories and provide programmatic access to a variety of scientific data and other real-time metrics of scholarly impact.
ropensci.org

TensorFlow Playground

TensorFlow is a machine learning library that underlies many of Google’s products. With this playground site, you can tinker with a neural network right in your browser.
playground.tensorflow.org


Datasets

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Crowdflower: Data for Everyone

Collection of free, downloadable, and categorized datasets that have gone through the Crowdflower platform.
crowdflower.com/data-for-everyone

Data.World: The Social Network for Data People

Discover and share cool data, connect with interesting people, and work together to solve problems faster. Users can find and use a vast array of high-quality open data.
data.world

Google’s My Activity Page

This portal reveals everything Google knows about you - every search you’ve made, the apps you’ve used, the videos you’ve watched, and everything in between. Visit to see how your data is being collected, modify activity settings, and delete data that you prefer not retained.
myactivity.google.com


Data Visualization

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Google Charts

Google Charts is a JavaScript-based tool that lets people easily create a chart from some data and embed it in a web page. It’s free and has a solid library of interactive charts and data tools available for use.
developers.google.com/chart

Google Data Studio

Free product lets you connect to all your marketing data and turn that data into beautiful, informative reports that are easy to understand, share, and fully customizable.
datastudio.google.com


MarTech

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Google Analytics Demo Account

If you’re like me, you learn by doing. This fully functional Google Analytics account is a great way to look at real business data and experiment with Google Analytics features. The data is from the Google Merchandise Store, a real ecommerce store, and it’s typical of what you would see for an ecommerce website.
support.google.com/analytics

The Definitive Glossary of Programmatic Advertising

Programmatic advertising is about using automated systems (technology) and data to make media buying decisions without humans. This is a helpful glossary of terms associated with this concept.
blog.hubspot.com/agency/programmatic-advertising-glossary

Real Story Group

This firm specializes in evaluating vendors in the MarTech space to help you find the right provider among a glut of offerings.
realstorygroup.com


Programming

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Beginner’s Resources to Learn Programming Languages

This blog post details some important programming languages and offers numerous links for learning more about each.
blog.vodien.com/beginners-resources-to-learn-programming-languages

Bento

A curated collection of tutorials and free learning resources for learning to code in new languages.
bento.io

CodeEnv

Free site lets you share your code with others in CodeEnv online environments. Good for teaching, prototyping, and sharing fiddles.
codeenv.com

CodeProject: Diving in OOP

Comprehensive article that covers almost every OOP (object-oriented programming) concept in detail with C# examples.
codeproject.com/diving-in-oop

Codility

Offers programming problems and lessons for challenging yourself to get to become a better coder.
codility.com/programmers

Fiddles.io

Offers sandbox environments for developers to play around with and modify live sample code for all kinds of languages. It’s also easy to share or demonstrate solutions to problems.
fiddles.io

Google’s Go Language

This article represents a nice primer on the differentiating features of Google’s Go language (Golang) and its tools, including its extremely lightweight concurrency.
infoworld.com/googles-go-language

HackerEarth

HackerEarth is a network of top developers across the world. Developers participate in online coding challenges and hackathons, solve problems and discover the best jobs.
www.hackerearth.com

HackerRank

Join over 2 million developers in solving code challenges on HackerRank, one of the best ways to prepare for programming interviews.
www.hackerrank.com

Java Beginner’s Guide: Part 1 of 3

Great series of posts that will help you either learn or brush up on Java programming concepts in a simple and effective way.
medium.com/@madhupathy/guide-to-java

LeetCode

Level up your coding skills and quickly land a job. This is a good place to expand your knowledge and get prepared for your next interview.
leetcode.com

Rosetta Code Programming Tasks

Offers over 800 problems that can be solved through programming in different languages. Great for practice.
rosettacode.org/wiki/Category:Programming_Tasks

Project Euler

Project Euler is a series of challenging mathematical/computer programming problems that will require more than just mathematical insights to solve. Although mathematics will help you arrive at elegant and efficient methods, the use of a computer and programming skills will be required to solve most problems.
projecteuler.net

Python Challenge

Python Challenge is a game in which each level can be solved by a bit of (Python) programming. It’s a good way to practice through solving riddles.
pythonchallenge.com

Python Tutor

This is a free tool that helps people overcome a fundamental barrier to learning programming: understanding what happens as the computer runs each line of source code. With it, you can write Python, Java, JavaScript, TypeScript, Ruby, C, and C++ code in your web browser and visualize what the computer is doing step-by-step as it runs your code.
pythontutor.com

Topcoder

Topcoder is a company that administers contests in computer programming, through which prize money can be won. Competition aside, this site also offers regular challenges and matches through which you can learn new skills and hone skills you already have.
topcoder.com

Understanding Go Pointers

This post is for programmers coming to Go who are unfamiliar with the idea of pointers or a pointer type in Go. It also digs deeper into the concept of computer memory (RAM) and how memory location is accessed through your code.
dave.cheney.net/understand-go-pointers

OverAPI

A huge selection of cheat sheets for almost any current programming language and other technologies.
overapi.com


Software Development

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30 Best Practices for Software Development and Testing

Some good suggested software engineering principles and testing best practices that might help save you time and headaches.
opensource.com/30-best-practices-software-development-and-testing

50 Tips for Improving Your Software Development Game

This post compiles the most illustrative advice and recurring tips from blogs/forums around the topic of being a great programmer. These are organized into five themes that emerged. A great reference for developers looking for ideas around self-improvement.
techbeacon.com/50-tips-improving-your-software-development-game

Draw.io

Draw.io is free online diagram software for making flowcharts, process diagrams, org charts, UML, ER and network diagrams.
draw.io

Git Branching Model

This post outlines a development model for git branching strategy and release management.
nvie.com/git-branching-model

Queues

This page tries to collect the libraries for the queueing systems (job, messaging, etc.) that are widely popular and have a successful record of running on (big) production systems.
queues.io

Libraries.io

Helping you make more informed decisions about the software you use. Libraries.io indexes data from a growing number of projects from numerous package managers. The ‘dependency tree’ that emerges is the core of the services that are provided.
libraries.io

StackShare

StackShare provides online software for displaying and sharing your technology stack, which is made up of the software that you use. It’s an online community that features comparisons, ratings, reviews, recommendations, and discussions of the best software tools and software infrastructure services.
stackshare.io

The Twelve-Factor App

In the modern era, software is commonly delivered as a service: called web apps, or software-as-a-service (SaaS). The twelve-factor app is a methodology for building SaaS apps that can be applied to apps written in any programming language, and which use any combination of backing services (database, queue, memory cache, etc).
12factor.net


Web Applications

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The Djanjo Book

Free online book offers comprehensive Python Django Tutorials, easy to understand Django documentation, the Model-View-Controller (MVC) design pattern, and more.
djangobook.com

PythonAnywhere

PythonAnywhere makes it easy to create and run Python programs in the cloud. You can write your programs in a web-based editor or just run a console session from any modern web browser. There’s storage space on our servers, and you can preserve your session state and access it from anywhere, with no need to pay for, or configure, your own server.
www.pythonanywhere.com

Python Web Frameworks

This report surveys 30 Python web frameworks that have more than 1,000 monthly downloads and provides a deeper look into six of the most widely used. Also provides general overview of web application frameworks and what they do.
oreilly.com/learning/python-web-frameworks


API Services

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Google Analytics Query Explorer

This tool lets you play with the Core Reporting API by building queries to get data from your Google Analytics views (profiles). You can use these queries with any of the client libraries to build your own tools.
ga-dev-tools.appspot.com/query-explorer

How to design a RESTful API architecture from a human-language spec

A three-post series that teaches RESTful API design to solve users’ needs with simplicity, reliability, and performance.
oreilly.com/learning/how-to-design-a-restful-api-architecture-from-a-human-language-spec

OpenWeatherMap

API for accessing current weather data for any location including over 200,000 cities.
openweathermap.org/api

OpenWeatherMap

API for accessing current weather data for any location including over 200,000 cities.
openweathermap.org/api

Postman

This free Chrome extension allows developers to explore, test, and build APIs using a powerful collaborative testing and development suite.
getpostman.com

Public APIs

Categorizes different APIs scoured from the web which make their resources available for public consumption.
github.com/abhishekbanthia/Public-APIs

RapidAPI

Enables developers to find, test, and manage API integrations from one place and provides real-time performance metrics.
rapidapi.com

RESTful Architecture

Technical documentation for RESTful web services with references and language-specific examples.
smartsheet-platform.github.io/api-docs

What is a REST API?

Thorough overview on what REST APIs are and how to use them.
idratherbewriting.com/docapis_what-is-a-rest-api


Website Tools

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BuiltWith

Enter the URL of a website and quickly find a list of the technologies used to support that site including email services, nameserver providers, JavaScript libraries, widgets, server information, and more.
builtwith.com

Font Awesome

Font Awesome makes it easy to add vector icons and social logos to your website.
fontawesome.com

Google Design: Resizer

An interactive viewer to see and test how digital products respond to material design breakpoints across desktop, mobile, and tablet.
design.google.com/resizer

How To Use GitHub Pages To Make Websites

Step-by-step tutorial to getting started with building a website hosted on Github Pages.
readwrite.com/github-pages

How to Host Your Static Site with HTTPS on GitHub Pages and CloudFlare

While GitHub offers free static website hosting and custom domain support, it is currently not possible to configure HTTPS for custom domains directly through GitHub Pages. This is where CloudFlare comes in.
developer.ubuntu.com/static-site-https-github-pages-and-cloudflare/

Lighthouse

Lighthouse is an open-source, automated tool for improving the quality of web pages. You can run it against any web page, public or requiring authentication. It has audits for performance, accessibility, progressive web apps, and more.
developers.google.com/web/tools/lighthouse

Mobile Website Speed Testing Tool

Another great Google product. Find out how well your site works across mobile and desktop devices by simply entering the URL.
testmysite.thinkwithgoogle.com

Static Site Generators

A leaderboard of the top open-source static site generators based on Github stars.
staticgen.com

Website Grader

Free online tool that grades any website against key metrics such as performance, mobile readiness, SEO, and security.
website.grader.com

Who Is Hosting This

Allows a user to simply enter the domain name of any site and instantly uncover the identity of the company that is hosting the site.
whoishostingthis.com