Data Engineer, summer job

Tko Aly; Helsinki; On-site; EUR 32,364 - 40,176; Full time

Job summary

A leading e-commerce company in Helsinki is seeking a Summer Data Engineer to develop and maintain data integrations using Python and Dagster. This role entails ensuring accurate data movement from source systems to the data warehouse and involves documentation and refactoring tasks. Ideal candidates are students or recent graduates in computer science or information systems with fluent Finnish and English skills. The position offers a salary range of €2,900–3,600 monthly and flexibility for remote work.

Qualifications

• Strong desire to understand how data moves between systems.
• Analytical mindset and enjoy solving technical problems.
• Fluent in Finnish and English.

Responsibilities

• Develop and maintain data integrations using Dagster and Python.
• Ensure reliable data movement from source systems to the data warehouse.
• Document data, refactor, and improve the existing codebase.
• Receive training to maintain the QlikSense system.

Skills

Python programming

SQL

Understanding of modern data architecture

Self-directed and well-documented working style

Education

Final stages of studies in computer science or information systems

Tools

Dagster

Airflow

dbt

Git

Job description

If you apply for this position, mention that you heard it from TKO-äly. ;-)

What would a summer surrounded by the data flows of Finland’s most popular online store sound like? As you might imagine, an iconic e-commerce company generates vast amounts of data. Your challenge this summer will be to build reliable solutions that move and transform this data into the right format. Join us in ensuring that our data is accurate, consistent, and ready to drive business value!

In a nutshell: Your summer job as a Data Engineer

Your main responsibility will be developing and maintaining data integrations using Dagster and Python. You will ensure that data moves reliably from source systems to the data warehouse. You will also work on basic-level data modeling with dbt to transform raw data into clear and usable models. In addition, your role will include a variety of early-career specialist tasks, such as documenting data and refactoring and improving the existing codebase. During onboarding, you will also receive the training needed to maintain the QlikSense system while your more experienced colleagues are on vacation. No prior experience with QlikSense is required.

At Verkkis, you will join a six-person data and analytics team responsible for ensuring that data is high-quality and easily accessible. With skilled teammates supporting you, you won’t be left alone in your role and will definitely have the opportunity to sharpen your technical skills using a modern data stack. If your summer at Verkkis goes well and you find the work meaningful, there may be opportunities for you with us in the future.

The summer position runs by agreement between May 1 and September 30, 2026. Working hours are 37.5 hours per week, and after onboarding, you may work remotely part of the time if you wish. Our office is located in Jätkäsaari, Helsinki, where we meet at least twice a week. The salary range for the position is €2,900–3,600 per month, with final compensation based on your experience and skills.

Would the Data Engineer role suit you?

You will succeed in this role if you have a strong desire to understand how data moves between systems and how it is structured into logical entities. You have an analytical mindset and enjoy solving technical problems. This position is well suited for a student in the final stages of studies in computer science or information systems, or for a recent graduate. In addition to Finnish, you will need fluent English skills in your work.

In the interview selection process, we primarily value demonstrated skills. Rather than focusing on your CV or grades, we are more interested in what you have accomplished. Therefore, we ask that you include a link to your GitHub project or portfolio in your application so that we can review your code and your approach to problem-solving.

Required skill set

• Python programming
• SQL
• Understanding of modern data architecture
• A self-directed and well-documented working style

We also appreciate

• Experience with orchestration tools (such as Dagster or Airflow)
• Knowledge of dbt
• Proficiency with Git
• Enthusiasm for developing retail data

Interested?

Great! We look forward to receiving your application. Please submit it by Sunday, March 1, 2026, by completing the application form. Include your informal cover letter and CV. Please note that we require summer employees to be at least 18 years old.

Do you have any questions? For more information about the position, please contact Head of Data and Analytics, Lauri Lepistö, at [e-mail]