August 14, 2025

Tech Intern (Climate-tech Start-Up)

Brussels
50k-70k

🚀 Our Mission & Impact

At Wise Energy,  everything we do we do it for one purpose: decarbonize the energy of all companies. We believe that to enable a true energy transition, it needs to be inclusive and accessible for all. This is why we always offer our solutions in a triple-win model, we get remunerated when the client starts saving his/her first euros.

💪 Your Mission

As a Tech Intern at Wise Energy, you’ll play an essential role in supporting the development of our innovative energy optimization platform, Wise.Brain. You will work closely with the CTO and the tech team to assist in building new features, enhancing platform capabilities, and ensuring the seamless integration of advanced technologies to help businesses decarbonize and save on energy costs. We are looking for an intern that can stay with us for a minimum of 6 months.

📋 What will you be doing

Your main tasks include:

  • Technical Support: Assist in the development and optimization of Wise.Brain’s platform, working with the CTO and senior developers to implement new features.
  • Coding & Development: Help in writing clean, maintainable code for both front-end and back-end systems.
  • Platform Testing: Participate in testing and debugging processes, ensuring the platform runs smoothly and any issues are addressed promptly.
  • Data Analytics: Assist in processing and analyzing data related to energy consumption to support decision-making and platform improvements.
  • Collaboration: Work closely with the CTO and the tech team to ensure that all technical aspects of the platform align with the company’s mission of decarbonization.

Approximate Distribution of Tasks:

  • 60% Assisting in feature development
  • 20% Testing and debugging platform components • 20% Data analysis and reporting
  • 20% Data analysis and reporting

🤝 With whom you will be working

You will work closely with the CTO, full stack developers, and contractors to support the ongoing evolution of Wise.Brain. You will also interact with cross-functional teams, including the marketing and sales team to receive feedback and implement them.

📈 How will we measure your success ?

After 3 months, you will have succeeded if:

  • You’ve contributed to the development of key features on Wise.Brain.
  • You’ve actively participated in platform testing and debugging.
  • You’ve demonstrated a strong understanding of the technologies used at Wise Energy.

After 6 months, your impact will be measured by:

  • Having consistently supported the tech team in building and improving Wise.Brain. • Contributing innovative ideas for product development and optimization.

🧠 What you need to succeed

Essential Skills:

  • Fluent in English (French and/or Dutch is a plus)
  • Bachelor or Master in Tech related field such as Computer Engineering
  • Familiarity with coding languages: Experience with languages such as Python, JavaScript, or similar programming languages.
  • Understanding of web technologies: Knowledge of front-end frameworks (e.g., React, Angular) and back-end development (e.g., Node.js, Django).
  • Interest in energy technology: Passion for sustainability and energy transition.

Experience that would help:

  • Problem-Solving: A good ability to analyze issues and propose solutions.
  • Adaptability: Comfortable working in a fast-paced, start-up environment.
  • Teamwork: Willingness to collaborate with various teams and contribute ideas.

🌱 Your evolution with us

This position could lead you to:

  • Full-time Developer after 6-12 months if you prove to be an exceptional fit.
  • Specialized roles in Energy Tech as you gain more expertise in the sector.
  • Leadership opportunities in the growing tech team as the company scales.

🏢 Our way of working

  • Place of work: Hybrid - Our office is located in ClimateHub, in the center of Brussels.
  • Hours: Flexible hours, typically 9 AM to 5 PM.
  • Equipment: We provide all necessary equipment except for your computer and phone.
  • Movement: Occasional visits to clients within the Benelux region may be required.

🎯 Our culture in a few points

You’ll thrive with us if:

  • You are passionate about energy and technology.
  • You enjoy the fast-paced, ever-changing environment of a start-up.
  • You’re eager to learn and grow in a dynamic team.

What could frustrate you:

  • The start-up world is constantly evolving, and sometimes things move fast—adaptability is key.

📝 Recruitment Process

  1. Interview 45 min first meeting with the CTO
  2. Case A technical case of to be sent
  3. Final Decision 1 day after the case you will receive our decision

Total Process Time: Approximately 3 days.

👋 How to apply ?

Send us your CV and be creative about your motivation letter (video, spider diagram, other)Send us all the documents at job.tech@wise-energy.odoo.com with the subject Tech Intern Application

Working at 

Wise

🧐 Who are we ? Wise Energy is a Brussels-based start-up focused on energy optimization. Our mission is to significantly reduce the carbon footprint of the energy consumed by our clients, while also helping them save money. To achieve this, we have developed a range of innovative tools that allow us to identify areas where energy optimization is needed and implement effective solutions to achieve it. 🤸 Be part of our Pioneering team! Wise Energy is just one year old! It all began with our Founder and CEO, Julien Jirikoff, managing everything on his own with the support of a few contractors. Since then, we've experienced rapid growth, allowing us to bring on more team members. However, as demand for our services continues to rise, we’re realizing that we still need more hands on deck to keep up with the increasing customer requests. Given the positive response to our product, we are confident that we're at the beginning of something truly impactful. Joining us now means the opportunity to grow alongside us as we scale.

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