Every IT job has an air of mystery to its roles and responsibilities. If you’re beginning a career in data science, you may be wondering what a day in the life of a data scientist looks like. There are several factors that influence the typical day for a data scientist – are you working for a start-up or a multinational company? Are you a full-time data scientist or an intern or a freelancer? It is actually very difficult to describe a typical day in the life of a data scientist because when your day-to-day tasks involve building data products to solve problems for billions of people, it is not possible to have a “typical” day. Every day in the life of a data scientist is a new challenge. Finding out what a data scientist does isn’t a cakewalk. Yet, we will try to understand and decode what a typical day looks like in the life of a data scientist.

A Day in the Life of a Data Scientist – Decoded

  • Defining the Data Science Problem 

One of the most important and primary steps that every data scientist follows along the data science pipeline is to identify and define the business problem by asking a lot of right questions. Data is only as good as the questions you ask. Unless a data scientist asks the right questions, it cannot provide the right insights for better business decision making. This involves various tasks such as understanding the business requirements, scoping an efficient solution, and planning the data analysis. Data scientists are responsible for analysing the pain points of the stakeholders and framing a data science problem from a stakeholder’s perspective. They gain domain knowledge from stakeholders and combine it with the data and the technical knowledge to build a data product for better business gains. 

  • Gather Raw Data for Analysis of the Defined Problem

Having defined the business problem, a data scientist is responsible for collecting all the required data that will help them solve the business problem. The next important task in the data science pipeline is to identify the data sources they have to dig in to get all the relevant data, choose the required fields, and collate all relevant information at one place that might be required in the future. If the required data is already available with the organisation, well and good. Otherwise, if a data scientist thinks that the available data is not enough to solve the business problem, they make arrangements to collect new data either through feedback from customers, surveys or by setting up a popular auto data collection paradigm like cookies for a website, etc. Once raw data is collected, a data scientist cleans and organises the data(70% of a data scientist’s time is spent on this)  to make corrections for any errors, remove missing values and identify duplicate records.

  • Decide on an Approach to Solve the Data Science Problem

Having gathered all the data and understood what questions they want to answer, a data scientist explores the best and most efficient methods to answer these questions. The best and efficient might not always be the same and finding a trade-off solution is the responsibility of a data scientist. For instance,  some of the questions can be answered by running a k- means clustering algorithm but this could be an expensive method particularly if it requires several iterations for a large dataset. However, these questions could also be answered with a simpler distance calculation method. A data scientist has to decide on the best method to approach a data science problem. There are various algorithmic approaches that can be applied to a data science problem, few of them are listed below–

  1. Two-Class Classification Approach – works best for finding answers to questions that have only two possible answers.
  2. Multi-Class Classification Approach – works best for finding answers to questions that have multiple possible answers.
  3. Reinforcement Learning Algorithms – when your problem is not predictive in nature and requires you to figure out what are good actions.
  4. Regression – works best for questions that have a real-valued answer instead of a class or a category.
  5. Clustering – works best when you want to classify each data point into a specific group and answer questions about how data is organised.
  • Perform in-depth Data Analysis – Apply Statistical Modelling, Algorithms, and Machine Learning 

The data that comes from 2.1 billion mobile devices, 216 million computers that were sold last year, or let’s say 1 million tablets need to be analysed to glean meaningful insights.  A data scientist is responsible for building automated machine learning pipelines and personalised data products for profitable business decision making. Having explored the data and decided on an approach, a data scientist analyses the data to get valuable information from it. There are several open-source data science tools and libraries in Python and R that can be used to analyse data and glean high-value insights for better business decision making. There are chances that an approach decided on in the above Step 3 might not work when a data scientist actually begins to analyse the data. A data scientist then has to start trying with other machine learning approaches and see what works best for their data science problem using the following 5-step approach –

  1. Build a machine learning model to answer the questions.
  2. Validate the model built against the data collected.
  3. Apply necessary algorithms and perform statistical analysis
  4. Present the results using various data visualisation tools.
  5. Compare the results with other approaches.

A data scientist experiments with several models and approaches before finding the best solution for a data science problem.

  • Communicate Insights to the Stakeholders  

Having tweaked and optimised the model to obtain the best results, the next most important task of a data scientist is to effectively communicate the findings so various stakeholders can understand the insights and take further action based on them. A picture is worth a million datasets. Data scientists work with various data visualisation tools like Tableau, QlikView, Matplotlib, ggplot, and others to demonstrate real-life cases on how the model is working on the actual customer. They create presentations with an appropriate flow to narrate a story the data can tell in a way that is easily comprehensible and compelling to the stakeholders.

Here’s how a typical day looks like in the life of a Walmart Data Scientist at Walmart Labs –

Here’s how a typical day looks like in the life of a Zeotap Data Scientist –

Meet Charlie Brown – Our Superhero Data Scientist

Charlie Brown is the name of our mental framework for an exemplary data scientist. Charlie has messy hair, wears round glasses, has intellectual curiosity, and a proactive problem-solving attitude. Charlie is the fictional character that we will use as a thinking model in this blog post to understand what does a data scientist does on a day-to-day basis.

The Data Scientist - 60 Second Data Science - YouTube
Image Credit: Data Scientist Mental Framework

Data scientists are all different, and most aspects of their responsibilities cannot be generalised as they are donned with multiple hats. Charlie is an example that we will consider as a typical data scientist.

7 AM Wake Up – An Early Riser

Charlie’s day starts with the first cup of coffee, the start of many. Checks his emails for any alerts on the code that has been in operation through the night and reacts if necessary.

8 AM Head to Work – Commute

When working on complex data science projects, Charlie is intensely thinking about which machine learning approach would work best for his dataset on his commute to the office. During other days where the data product has already been built and the team is working on code polishing or other temporal activities, Charlie spends his commute time listening to some interesting data science podcasts or classic music.

9 AM Arrive at Work 

Grab a cup of coffee and head to the desk. A busy day starts. Last week Charlie’s data science team released a new recommender engine. Charlie monitor’s the outcome of this recommender engine to see there have been no surprises or critical issues during the night that need dealing with. Charlie then checks the infrastructure health and data pipeline to ensure everything is working as expected.

11 AM Sprints and Stand-up Meetings 

Yesterday, Charlie has been working on optimising and tuning the parameters of a random forest machine learning model. Today, he plans to evaluate the accuracy and variations in predictions of all the tuned parameters. Charlie and his team hold meetings with different cross-functional members. They have meetings with various stakeholders, the project managers, marketing, sales, and mention what they’re working on and what they plan to work on next. The stakeholders brief the data scientists more in detail about the users and share the customer feedback reviews. This helps Charlie and his team understand their goals and how the data can be leveraged to achieve these goals.

There is another meeting that Charlie attends with peer data scientists and data analysts where his team presents the actual details of the project, shares the code and visualisations with each other, and discusses the progress. These meetings are typical task trackers to ensure that everyone in the data science team is on the same page and to ensure that there are no blockers. Charlie and his team use Jira task management platform to organise tasks to display sprints and groups the tasks based on where they are in the data science process. 

1 PM Lunch

Lunch is sometimes delayed not because Charlie is not hungry but sometimes he gets so busy and engrossed in the code that he has his lunch only after he feels that he has made some progress towards analysis. 

2 PM – 5 PM  Code, Code, and Code

Developing a machine learning model requires several days, weeks, or months and there is a step-by-step process every data scientist follows. This is the time when actual requirements gathering, data preparation, exploratory data analysis, feature engineering, and model building takes place. Some days Charlie is building data cleaning or plumbing services using various data scientist tools, other days he could be doing some academic style-research and coding in Python to implement a machine learning algorithm. He could also be performing analysis in Jupyter notebook using SciKit learn or firing up PyCharm to code up a class that implements a machine learning model or interfaces with the database. 

He could be using Spark MLlib library to churn machine learning models or do k-means clustering, or he could be prototyping in R using ML packages or could be creating beautiful data visualisations using Tableau or Qlikview to communicate the insights to stakeholders or he could be using Apache Hive to pull data or could be creating summaries by pulling data in an excel. Charlie also helps his team members to improve their machine learning models by testing the current model on real data and identifying any false negatives. He also creates new training examples to fix problems if any. 

6 PM Code Revie

Having coded all day long, it’s time to let your peers know about the changes you have committed. Code reviews usually happen over conference calls or through in-person meetings. Charlie takes the help of other data scientists in his team when he is stuck with a code snippet and also makes it a point to explain the code to his peers so he knows his code better. The collaboration of new ideas and brainstorming happens in these meetings.

7 PM – End of a Hectic Day….Home Time!

Charlie heads back home but if there is any data science or tech event happening in his company he makes it a point to attend that so that he can learn new things from brilliant tech minds. Charlie likes to unwind his evening researching on some latest data science trends and technologies to keep himself updated.

This is how a typical day in the life of a data scientist looks like but as already mentioned this varies from project to project, company to company, and person to person. There are many data science companies and hundreds of data scientists but the data science process and the tasks a data scientist will be involved in remain the same.

A day in the life of a data scientist is similar to the life of a writer who is always immersed in a deep state of concentration. A typical day in the life of a data scientist is never boring or dull, instead it is full of challenges and opportunities to learn new things and solve new business problems. 

There’s no question that learning data science can completely transform your career prospects. Data science skills are in-demand, with India alone likely to see a 62% increase in data science job openings. And the data science industry is also popular for its high salaries – average data scientist salary is 10 lakhs per annum. If you like the sound of Charlie’s day and the perks a data scientist job entails, enroll for Springboard’s comprehensive, 1:1 mentor-led data science online program to become a qualified data scientist in 6 months with a job-guarantee. If we can help you become a data scientist, it’ll be worth it.