I recently completed Colin Fay’s excellent DataCamp course, Intermediate Functional Programming with purrr (full disclosure: I work at DataCamp, but part of why I joined was that I was a big fan of the short, interactive course format). Although I’ve used the purrr package before, there were a lot of functions in this course that were new to me. I wrote this post to hopefully demystify purrr a bit for those who find it overwhelming and illustrate some of its lesser known functions.

In early 2018, I gave a few conference talks on “The Lesser Known Stars of the Tidyverse.” I focused on some packages and functions that aren’t as well known as the core parts of ggplot2 and dplyr but are very helpful in exploratory analysis. I walked through an example analysis of Kaggle’s 2017 State of Data Science and Machine Learning Survey to show how I would use these functions in an exploratory analysis.

When I was working at Etsy, I benefited from a very robust A/B testing system. Etsy had been doing A/B testing for more than 6 years. By the time I left, Etsy’s in-house experimentation system, called Catapult, had more than 5 data engineers working on it full-time. Every morning, I was greeted with a homepage that listed all the experiments that Etsy had run in the prior four years. When you clicked on one, you got a summary of what the experiment was testing (usually written by the product manager).

This post was co-written with Jacqueline Nolis, Principal at Nolis, LLC. Check out the rest of her blog posts, including ones on prioritizing data science work, hiring data scientists, and what to do when your data science project isn’t working. When interviewing for any position, you should be evaluating the company just as much as they are evaluating you. While you can research the company beforehand on glassdoor and similar sites, interviews are the best place to get a deeper understanding of the company and ask important questions.

Following Dave Robinson’s sage tweet to write a blog post when you’ve given the same advice three times, this post is a collection of my thoughts and recommendations for people interested in applying to data science jobs in the US. Many of these principles also apply to tech jobs in general. A disclaimer: I have never worked as a recruiter or career coach. This knowledge comes from mainly from my study of Organizational Behavior (including negotiations and women in tech) in graduate school and my own career.

In my last post, I discussed the importance of building your network and some strategies for effectively reaching out. I closed with emphasizing how helpful your peers or people one step ahead of you can be. But there’s a specific area where people with more resources, status, or experience can help you: sponsorship. What is sponsorship? When people discuss what they’re seeking from a more senior person in their field, they usually talk about “mentorship.

So you’ve heard you’re supposed to network. That’s the key in getting a job or establishing a reputation in your broader field, right? And it’s true that the importance of having a good network is supported by a lot of social sciences research. But if the thought of networking makes you cringe, you’re not alone. Many people equate networking to sending out millions of unsolicited Linkedin requests with no message, handing out 20 business cards at a meetup once a week, or sending emails to prominent data scientists with the subject line “Can I pick your brain?

In the other part of this post, I covered how to start becoming involved in the data science community and meet people in general. But what if you read a really cool post by someone and want to follow up with them? This post offers some thoughts on how you can most effectively reach out to specific people. Two important caveats to start, both inspired by other posts on similar topics.

About two months ago I put a call out to Rstats twitter: #rstats twitter - who loves helping to make (short) code run as fast as possible? Playing w/ foreach, doparallel, data.table but know little — Emily Robinson (@robinson_es) October 4, 2017 I had a working, short script that took 3 1/2 minutes to run. While this may be fine if you only need to run it once, I needed to run it hundreds of time for simulations.

A few weeks ago, I wrote about my experience giving my first data science talk. If you’re interested, the full talk is available online, as well as the slides. In this post, I wanted to share some suggestions for managing business challenges that I didn’t have time to cover in my talk. Why Business Challenges? Why devote a whole post and half a talk to business challenges instead of, say, cutting edge deep learning papers or the shiny new language for handling Big DataTM?