As the data science field matures, the distinction between data roles has grown sharper, allowing more standard classification. While the roles of data analyst, data scientist, and data engineer are still somewhat similar, each require specialized knowledge that significantly alter the skillsets required. A migration has been underway for some time, as people realign their skills and goals with these more distinct fields.
One of the most common transitions we are seeing is the shift from data analytics to data engineering. This requires a shift not only in technical skills, but also in foundational knowledge and mindset, as each role interacts with different parts of the data pipelines. In this blog, we look at the differences between the data analytics and data engineering roles, as well as the implications of a transition from one role to another.
A data analyst focuses on processing structured data, typically queried from a database or cleaned from a data pipeline. A data analyst’s job is to provide insights from the data, often through visualizations. Data analysts have an additional important function, they must translate their findings to non-technical stakeholders inside and outside the organization. Data is only useful if it can be understood.
Data analysts work with a range of tools, including Excel, SQL, as well as data visualization platforms like MatPlotLib or PowerBI. They require proficiency in both statistical and data manipulation skills. Let’s take a look at a data pipeline and break down where a data analyst will be most active:
As you can see, the data analyst plays crucial roles in the following tasks:
More about data analyst:
Data engineers are responsible for creating and maintaining the architecture (databases and large-scale processing systems), pipelines, and data sets that data analysts and data scientists use in their work. These professionals are skilled in data warehousing solutions, and they ensure data is clean, reliable, and easily accessible. Let’s delve into the specifics of a data engineer’s role:
More about data engineering:
Data analytics and data engineering are two distinct facets of the broader data landscape.
An analyst, armed with tools like SQL, Excel, and Tableau, dives deep into structured data to produce actionable insights. Their primary objective is to make sense of the data and to present it in a way that drives informed business decisions. An emphasis on communication skills is paramount, as translating complex data into understandable narratives is crucial.
Conversely, a data engineer’s realm is the back-end infrastructure. Their challenge lies in ensuring the data’s journey—from raw, unstructured form to a clean, usable state—is effective at scale. Using technologies like Hadoop, Spark, and various database systems, they lay the groundwork for analysts and data scientists. Their focus extends beyond just data storage, it also encompasses data integrity, reliability, and accessibility.
In essence, while analysts shine a light on the “what” and “why” through their insights, engineers craft the “how” by building robust data foundations. Transitioning between these roles means navigating between the nuanced challenges of data interpretation and infrastructure development.
We will now examine the education and experiences that best complement that transition.
Transitioning from a data analytics background to a data engineering role, via formal education, necessitates a multi-faceted approach.
Firstly, while many data analysts have varied educational backgrounds, data engineering careers will benefit heavily from bachelor’s degrees in Computer Science, Information Systems, or a related field. If you are coming from an unrelated degree field, some universities now cater to this transition by offering “bridge” programs or post-baccalaureate courses. These programs aim to fill foundational gaps and equip students with essential computer science knowledge.
Secondly, for a more specialized and in-depth understanding, considering a master’s degree in Data Engineering or Big Data Analytics can be a strategic move. Offered by several renowned institutions, these programs delve deeper into data architecture, storage, and processing—core areas of data engineering. An advanced degree in this area not only bolsters one’s theoretical knowledge but can also provide a competitive edge in the job market. These courses are not required to be a successful data engineer however.
Lastly, irrespective of one’s familiarity with SQL or database systems from an analytics background, undertaking formal courses in Database Management can be beneficial. A stronger grasp of advanced database concepts is a cornerstone of a data engineer’s skillset, and formal training in this domain ensures proficiency.
Two people are looking to transition to data engineering:
Alex comes from a Computer Science background and has experience in data analytics within a tech firm. His strengths lie in programming, system design, and database management.
Jordan, on the other hand, studied Business Administration with a minor in Data Analytics. He worked as a data analyst for a retail chain and brings strong business domain knowledge and insights generation from data.
In transitioning to a Data Engineering role:
If you’re transitioning from a data analytics background to a data engineering role, you already possess a foundational understanding of data, its importance, and how to interpret it. However, data engineering requires a deeper dive into the technical aspects of data handling, storage, and processing. Here’s an educational path you might consider:
Foundational Courses in Computer Science and Programming:
Concepts such as algorithms, data structures, and object-oriented programming are fundamental. If you don’t have a computer science background, consider taking introductory courses in these areas.
Database Management and SQL:
While you may already be familiar with SQL from your analytics background, a richer understanding will be beneficial. Look into courses or workshops that delve into advanced SQL topics, database architecture, and both relational and NoSQL databases.
Big Data Technologies:
Learn about distributed data storage and processing frameworks like Hadoop, Spark, and Kafka. Platforms like Cloudera and Databricks offer certifications and training in these technologies.
Familiarize yourself with major cloud platforms such as AWS, Google Cloud, or Azure, particularly their data-related services. Cloud providers often offer training and certifications, which can be immensely beneficial.
ETL Tools and Processes:
Tools like Apache NiFi, Talend, or Informatica are commonly used for data integration tasks. Having hands-on experience with ETL (Extract, Transform, Load) processes and tools will be crucial.
We’ve mentioned a few of the certifications out there, as many companies now offer them for their platforms. Look for ones from cloud providers (e.g., AWS Certified Big Data) or technology-specific certifications (e.g., Apache Spark), which can bolster your resume and provide practical skills.
Theory and coursework are essential, but there’s no substitute for hands-on experience. Consider building your projects, contributing to open-source initiatives, or seeking internships or temporary roles that allow you to practice data engineering. Consider the following takehomes from Interview Query to boost your portfolio.
Remember, while formal education and certifications can significantly aid your transition, continuous learning and hands-on experience are equally important in the rapidly evolving field of data engineering.
Transitioning from a data analytics to a data engineering role involves a broadening of your toolset. Data Engineering is largely about the design and construction of the systems and infrastructure used in collecting, storing, and analyzing data. As such, you’ll need to be familiar with a wider array of tools, languages, and frameworks. Here’s a breakdown of what you might need to focus on:
When considering data warehousing solutions, a variety of platforms emerge as frontrunners in the industry. Snowflake stands out as a cloud-native data warehousing solution that offers scalability and flexibility. In contrast, Teradata functions primarily as an RDBMS and is typically chosen for crafting large-scale data warehousing applications. Another notable mention in this realm is Google BigQuery, a fully-managed and serverless data warehouse offering from Google Cloud that streamlines big data analytics.
As businesses and developers move towards more consistent and reproducible environments, tools facilitating infrastructure as code and deployment are gaining traction. Docker is at the forefront of this revolution, ushering in an era of containerization that allows developers to encapsulate their applications in standardized environments. Once you have containers, managing them, especially at scale, becomes the next challenge. This is where Kubernetes comes into play. As an orchestration tool, it aids in efficiently handling containerized applications across a cluster. Complementing these technologies, Terraform emerges as an essential Infrastructure as Code (IaC) tool. With Terraform, developers can define and set up data center infrastructure using a declarative configuration language, ensuring infrastructure consistency and reliability.
In the modern era of software development, version control is paramount. Git serves as the backbone for many developers, offering robust code management and collaboration capabilities. While Git provides the underlying versioning mechanism, platforms like GitHub and GitLab elevate the experience by furnishing collaborative platforms. These platforms allow teams to host, review, and work together on Git repositories, ensuring seamless code integration and team collaboration.
Remember, you don’t need to be an expert in all of these tools and technologies. The key is to have a foundational understanding of a broad spectrum and then specialize in the tools and frameworks that are most relevant to your specific role or industry.
Transitioning from a data analytics role to data engineering demands a foundational understanding in several key areas to adeptly navigate the intricacies of building reliable data systems. A good starting point is an advanced proficiency in SQL, which goes beyond the usual analytics purview. This includes optimizing complex queries, having a grasp of execution plans, and understanding the nuances of table design and indexing for optimal performance. Additionally, a familiarity with the core tasks of database administration such as backups, replication, and scaling is invaluable.
Venturing further into the field, a data engineer’s role is closely tied to the creation and management of data pipelines. This encapsulates the design, deployment, and upkeep of ETL (Extract, Transform, Load) processes. Hands-on experience with Big Data technologies, especially within frameworks like the Hadoop ecosystem and Spark, is indispensable. The growing reliance on cloud services in contemporary data operations underscores the importance of gaining practical experience with platforms like AWS, GCP, or Azure. This extends to the provisioning and administration of data-centric services on these platforms. Additionally, a foundational understanding of container technologies, such as Docker, and orchestration tools like Kubernetes, offers a competitive edge. Equally pivotal is the ability to collaborate and communicate with a gamut of data professionals and stakeholders, ensuring that the data infrastructure is in sync with overarching business goals.
Two people are looking to transition to data engineering:
Priya worked in a small startup as a data analyst, mainly handling a traditional relational database. Her main tasks revolved around data extraction using SQL for reports. She had occasional exposure to query optimization but with limited, smaller datasets.
Carlos, in contrast, was a data analyst in a larger corporation that used both relational databases and a cloud data warehouse. He frequently interacted with extensive datasets and honed his skills in SQL, not just for extraction but for performance optimization as well. Carlos also had hands-on experience with basic ETL processes and occasionally collaborated with the cloud solutions team.
In transitioning to a Data Engineering role:
Choosing the right projects to work on, especially when transitioning or building expertise in data engineering, should be a strategic decision. Firstly, reflect on your current industry. If you’re aiming to leverage your existing domain knowledge, select projects that address specific challenges or gaps in that sector. For instance, if you’re coming from healthcare analytics, projects related to electronic health record (EHR) integrations or patient data anonymization can be leveraged. This approach allows you to blend your data engineering skills with industry-specific knowledge, creating a niche expertise that can be a potent differentiator.
Conversely, if you’re looking to pivot to a new industry, familiarize yourself with its unique data challenges and trends. Research prominent companies in the target sector, and identify the technological stacks they employ or the data problems they face. If you aim to join the finance sector, projects that delve into real-time transaction processing, fraud detection, or financial forecasting using vast datasets could be insightful. Tailoring your projects to simulate or solve real-world issues in your desired industry not only boosts your portfolio’s relevance but also showcases your proactive approach to potential employers.
Interview Query’s blogs offer a vast selection of carefully curated datasets and projects that might help you get started with your data analytics portfolio. For example, you can try reading through these SQL project ideas article or try building your own pipeline with some of the takehomes we have to offer.
Let’s look at one of the most fundamental data engineer skill: ETL. The extract-transform-load process is one of, if not the most, quintessential data engineering task, allowing data engineers to provide automated data flows to data marts and data lakes. We have a blog article made specifically for ETL and data engineers, the ETL Interview Questions blog.
Approaching data engineering projects, especially those centered on ETL, begins by understanding the scope and objectives of the task. First, identify the data sources and their formats, then assess the quality of the data. Next, determine the desired output or end state and understand any transformations the data must undergo. Using tools and frameworks best suited for the job, design a data pipeline that extracts from the source, transforms as necessary, and loads into the target system, whether it be data marts or data lakes. It’s essential to consider scalability, efficiency, and error handling in your design.
Once you think that your portfolio is buffed enough and showcases different skills necessary for a DE position (SQL, ETL, System Design, etc.), you should start applying for jobs that align strongly with what you think are your most honed skillsets. However, keep your options open and know that it’s perfectly fine to learn on the job! Nobody expects an applicant to know every single thing in a job position. In fact, quite the contrary. It is common to have no single member understand the entire data pipeline thoroughly (especially in huge projects). As such, feel confident in applying to these jobs and prepare yourself thoroughly.