Are you all about science and technology? Would you like to develop your skills and use them to tackle the greatest challenges of our time? VTT might be just the place for you – apply now for summer traineeships! 

VTT is one of the leading applied research organisations in Europe. What unites us are curiosity, a passion for learning, and a purpose: to solve the biggest challenges of our time and turn them into sustainable growth and well-being. Our cross-disciplinary community of nearly 2400 brilliant minds from 60 different nationalities is focused on creating impact through science-based innovation. Now, we are looking for passionate changemakers – you – to join us as summer trainees.

Our last summer's trainees rated their summer job experience at VTT 4.8/5 in our summer job survey. Below are some excerpts from their feedback when asked how they would describe VTT as a workplace:

"I was impressed by how much responsibility and freedom I was given. I was trusted to work independently, but support was always available when needed."

"VTT is a professional, inspiring, and forward-looking workplace where practical impact is evident. The work community is skilled and open to new ideas."

"I found VTT versatile, innovative, and inspiring."

Do you want to be our next Summer Trainee in our team Integrated Energy Systems and Technologies team? 

As a Summer Trainee, your key goals are to support the development of data-driven tools and insights for smart greenhouse energy management.

In this position, you will work hands-on with real-world greenhouse and smart grid data: cleaning and combining datasets, analysing patterns using data analytics and machine learning methods, and supporting the development of AI-based concepts such as “AI gardener”. Your work will combine desk-based data analysis with occasional field visits to greenhouses for data collection and interviews.

Our team, Integrated Energy Networks and Technologies, works on data-driven solutions for energy efficiency, flexibility in distributed energy systems, and optimization algorithms for planning and operating the current and future energy system.

The Integrated Energy Networks and Technologies team focuses on providing technology and software solutions to plan and operate a carbon-free energy system across sectors. In this work specifically, the team of researchers focuses on combining smart grid data, user behaviour, and AI methods to enable more efficient and sustainable energy use. Our work supports VTT’s broader mission of solving global sustainability challenges by developing scalable digital and data-driven solutions for the energy transition.

What would your responsibilities as a include?

• Cleaning, parsing, and combining heterogeneous datasets (e.g. time series, sensor data, operational data).
• Performing exploratory data analysis and basic big data analytics under supervision.
• Applying machine learning methods for pattern recognition and predictive analysis.
• Supporting the drafting and testing of AI/ML-based concepts (e.g. “AI gardener” logic).
• Collecting data during greenhouse visits and documenting observations.
• Conducting and summarising greenhouse interviews together with the project team.
• Preparing short technical summaries, figures, or internal reports based on analysis results.
• Collaborating closely with supervisors and other team members on a weekly basis.
• Optionally: supporting the setup or documentation of data management infrastructure (e.g. remote data connections).

We're lookign for someone who:

• Is a Master’s-level student in a relevant field, such as:
  • Data Science, Computing Sciences, Electrical Engineering, Machine Learning, Signal Processing or Statistical Data Analytics
• Has experience with data processing and analysis, preferably using Python (e.g. pandas, NumPy).
• Has basic understanding of machine learning or statistical modelling (required).
• Is familiar with AI/ML libraries (e.g. scikit-learn, PyTorch, TensorFlow) (nice to have).
• Is comfortable working with real-world, imperfect datasets.
• Can read technical documentation and write short reports in English. As this work may require interactions with local communities, Finnish or Swedish is also required.
• Is able to work independently but also collaborate closely with a multidisciplinary team.

As a person, we hope that you are:

• Are curious and motivated to learn new methods and tools in data analytics and AI.
• Enjoy solving practical problems using data rather than working only with clean, theoretical examples.
• Are proactive, structured, and willing to ask questions when needed.
• Value teamwork and open communication.
• Are interested in applying data and AI to support sustainability and energy transition goals.

What would we offer you?

• Impactful work for the future. As a leading applied research organisation, we are on a mission to bring exponential hope to the world by joining together people, businesses, science and technology. We tackle the biggest challenges of our time – from climate change and resource sufficiency to industrial renewal and smart healthcare – and turn them into sustainable growth. Read more about our strategy – the path of exponential hope.
• Career opportunities, top-level mentors. At VTT, your skills are appreciated and supported with the opportunity to learn from the top experts in their field. You’ll get to discover our community of nearly 2400 experts representing 60 nationalities working across cutting-edge fields of science and technology.
• Meaningful projects, real responsibility. With us, you get to take on meaningful projects and create innovative scientific and technical solutions. We treat all employees as equals and give you real responsibility from the start. VTT is a caring employer that supports your growth and work–life balance and offers a range of well-being services.

What is like to work with us solving the biggest challenges of our time? Check from the video what kind of experiences Aymara, Daniil, Eric and Isabella had from their summer traineeships and what kind of change did they drive.

Apply now and join our community of brilliant minds!

Come, curious minds and clever changemakers! Prepare your CV and cover letter, and send in your application with your transcript of records via our recruitment system as soon as possible but at the latest by 22 February 2026. Let’s change the world for the better next summer.

All VTT Summer of Changemakers traineeships are paid, and the salary is determined based on study credits: for Master's students the monthly salary is between 2650€ and 2850€, and for Bachelor's students the monthly salary is between 2150€ and 2450€. The typical duration of traineeships is between 3 and 6 months, with start dates usually falling between March and June, however the length and the exact starting date can be discussed with the hiring team. 

Please read more of VTT Summer of Changemakers from here: https://www.vttresearch.com/en/summer-changemakers

Interested and want to hear more?

For further information, please contact Research Scientist, Matti Aro, matti.aro@vtt.fi, 0401873719 (available: Friday afternoons 14-16)

We will process applications as they come in, and fill in the position as soon as we find the right candidate. 

We look forward to hearing from you!

Location: Espoo, Tampere or Oulu