Data has become one of the most important assets for modern businesses. Companies use it to understand customers, improve products, automate decisions, and plan for growth.
But having data isn't enough. Businesses need people who can build the systems that collect, process, store, and deliver that data reliably.
That's where data engineers come in.
Hiring a strong data engineer can be challenging because the role sits at the intersection of software engineering, databases, cloud infrastructure, and data systems. A candidate may have experience with one part of the stack but lack the broader skills needed for your specific environment.
At PlaceMeRight, we help businesses recruit technology professionals and build stronger technical teams. Here's a practical guide to hiring data engineers who can actually contribute to your organisation.
- Understand What a Data Engineer Does
Before starting the hiring process, make sure everyone involved understands the role.
Data engineers typically build and maintain systems that allow organisations to collect, transform, store, and access data.
Depending on the company, they may work on:
• Data pipelines
• Data warehouses
• ETL and ELT processes
• Databases
• Cloud infrastructure
• Data quality
• Streaming systems
• Analytics platforms
• Infrastructure automation
The responsibilities can vary significantly between companies, so avoid using a generic job description.
- Define Your Technical Requirements
The technology stack should reflect the actual work the candidate will perform.
Depending on your environment, you may need experience with:
• Python
• SQL
• Java or Scala
• Apache Spark
• Apache Kafka
• Airflow
• AWS, Azure, or Google Cloud
• Snowflake
• BigQuery
• Databricks
Not every candidate needs to know every technology.
Focus on the core skills required from day one and separate them from technologies that can be learned after joining.
- Prioritise Strong SQL Skills
SQL remains one of the most important skills for data engineers.
Candidates should understand how to work with relational data and write efficient queries.
Depending on the seniority of the role, explore their knowledge of:
• Joins
• Aggregations
• Indexes
• Window functions
• Query optimisation
• Data modelling
• Transactions
A candidate who claims strong SQL experience should be able to explain how they've used it in real projects.
- Evaluate Data Pipeline Experience
Data pipelines are central to many data engineering roles.
Ask candidates to explain a pipeline they have built or maintained.
Useful questions include:
• Where did the data come from?
• How was it transformed?
• Where was it stored?
• How was the pipeline scheduled?
• How did you handle failures?
• How did you monitor data quality?
• What happened when the data volume increased?
These questions help reveal whether the candidate understands data engineering beyond individual tools.
- Assess Cloud Knowledge
Modern data platforms increasingly run in cloud environments.
Depending on your technology stack, candidates may work with AWS, Microsoft Azure, or Google Cloud.
You don't necessarily need someone who knows every cloud service.
Instead, look for practical experience with areas such as:
• Cloud storage
• Compute
• Databases
• Data warehouses
• Security
• Monitoring
• Infrastructure
Ask candidates how they have used cloud technologies in real projects rather than simply asking them to list certifications.
- Look for Problem Solving Skills
Data engineering involves plenty of unexpected problems.
A pipeline may fail. Data may arrive late. A query may suddenly become expensive. A source system may change its structure.
Strong candidates should be able to investigate these situations logically.
Give them realistic scenarios and ask how they would approach them.
Pay attention to whether they:
• Ask clarifying questions
• Identify possible causes
• Consider tradeoffs
• Think about scalability
• Consider reliability
• Explain their reasoning
You are evaluating their thinking, not just their final answer.
- Test Data Modelling Knowledge
Data engineers often need to decide how information should be structured and stored.
Depending on the role, discuss concepts such as:
• Relational modelling
• Normalisation
• Denormalisation
• Fact and dimension tables
• Data warehouses
• Data lakes
• Data lakehouses
Senior candidates should be able to explain why they would choose one approach over another.
- Include a Practical Assessment
A practical assessment can help validate technical skills more effectively than a resume alone.
For example, you could ask a candidate to:
• Design a simple data pipeline
• Write SQL queries
• Transform a dataset
• Identify problems in an existing pipeline
• Design a basic data warehouse
Keep the exercise relevant to the actual role.
A long, unrelated coding assignment can create a poor candidate experience without giving the hiring team useful information.
- Evaluate Communication Skills
Data engineers rarely work alone.
They often collaborate with software developers, data scientists, analysts, product teams, and business stakeholders.
Look for candidates who can explain technical concepts clearly to people who may not have a data engineering background.
Strong communication helps teams make better decisions and prevents technical problems from becoming business problems.
- Look at Real Project Experience
A resume can list technologies, but real projects provide much more context.
Ask candidates about projects where they:
• Built data pipelines
• Improved data quality
• Reduced processing time
• Migrated systems
• Worked with large datasets
• Improved reliability
• Reduced infrastructure costs
Ask what they personally contributed.
This is particularly useful because candidates sometimes mention technologies that their wider team used even when they weren't directly responsible for them.
- Consider Scalability
A data system that works for thousands of records may struggle when the business starts processing millions or billions.
For experienced candidates, discuss how they would approach growing data volumes.
Explore topics such as:
• Distributed processing
• Partitioning
• Parallelisation
• Caching
• Streaming
• Storage optimisation
• Monitoring
The depth of these discussions should match the seniority of the position.
- Don't Hire Only for Today's Stack
Technology changes quickly.
A candidate may not have experience with every tool your company currently uses.
Instead of rejecting someone immediately because they haven't worked with one specific platform, consider whether they understand the underlying concepts and can learn new tools.
A strong data engineer who understands pipelines, databases, distributed systems, and cloud architecture can often adapt to a new technology stack.
- Keep the Hiring Process Efficient
Data engineers are in demand, and strong candidates may have several opportunities.
A long recruitment process can make your company lose them before you reach the offer stage.
Keep the process structured and communicate clearly about:
• Interview stages
• Technical assessments
• Expected timelines
• Feedback
• Next steps
A good candidate experience can make your company more attractive even before you make an offer.
Common Mistakes to Avoid
Companies often struggle with data engineering recruitment because they:
• List too many technologies as mandatory
• Focus only on years of experience
• Rely entirely on resume keywords
• Use unrealistic technical assessments
• Ignore communication skills
• Take too long to make hiring decisions
• Don't involve technical hiring managers early
A focused hiring process is usually more effective than a complicated one.
Final Thoughts
Hiring data engineers requires more than finding someone who knows Python or SQL.
The right candidate should understand data pipelines, databases, cloud environments, scalability, reliability, and practical problem solving. They should also be able to communicate effectively with the rest of the engineering and business teams.
At PlaceMeRight, we help startups, growing businesses, and enterprises recruit data engineers, software developers, cloud professionals, DevOps engineers, and other technical talent through targeted sourcing and structured recruitment strategies.
If you're building a modern data team and need help finding the right technical professionals, visit https://placemeright.in to explore how PlaceMeRight can support your hiring goals.
The best data engineer isn't simply someone who knows the latest tools. It's someone who can turn messy, complex data problems into systems that people and businesses can actually rely on.
