BESS Hardware Engineer, G.E.S.

We are a European energy technology company focused on advancing energy storage through innovative software and system design. Our mission is to develop safer, smarter and more sustainable alternatives for modern energy infrastructure.

We are revolutionising energy storage with AI, cybersecure software, and environmentally friendly sodium-ion batteries. We provide safer, smarter, more sustainable, and cost-effective alternatives to traditional lithium-ion energy storage systems, meeting the evolving demands of the energy sector. www.gridenergystorages.com

We are looking for a hands-on BESS Engineer to help design and build Battery Energy Storage System (BESS) solutions as the company scales across Europe.

This role is ideal for an engineer who enjoys turning concepts into working systems — designing, prototyping, testing, and improving products in a fast-moving environment. You will play a key role in developing early-stage solutions and supporting their evolution into commercial products, ensuring reliability, safety, and compliance with European grid requirements.

What You’ll Do

• Contribute to building and developing a high-performing engineering and R&D function

• Design, develop, and integrate BESS system architectures, including batteries, inverters, EMS integration, and grid connection

• Build and test prototypes and pilot systems

• Support the transition from prototype to commercial product

• Collaborate closely with hardware, software, and integration teams

• Work on system protection, power quality, and control strategies

• Perform system testing, troubleshooting, and performance optimization

• Ensure compliance with EU grid codes, safety standards, and international requirements

• Support technical documentation, certification, and regulatory processes

What We’re Looking For

• Master’s degree (or equivalent) in Electrical Engineering, Energy Systems, Power Electronics, or a related field

• Several years of experience in energy storage, power systems, renewables, or related technologies

• Strong hands-on experience with BESS components and system integration

• Experience with grid-connected systems, inverters, and battery technologies

• Ability to design, build, test, and iterate on real hardware systems

• Practical, problem-solving mindset suited to a startup environment

• Experience with European or international energy projects is a plus

• Strong communication and presentation skills

• Fluent English and Finnish are required

Why Join Us

🔋 Opportunity to build energy storage solutions from the ground up
🔋 Hands-on engineering role with direct technical impact
🔋 Work in a fast-growing energy technology environment
🔋 Exposure to European markets with global technical standards

Our Mission:

Our mission is to develop and bring to market innovative, sustainable, safe, and scalable energy storage technologies that enable more efficient use of renewable energy, a more responsible value chain, and the achievement of climate goals.

Our Vision:

Our vision is to become Europe's first and foremost industrial-scale sodium-ion battery manufacturer, delivering environmentally friendly, safe and cybersecure solutions to European and other Western markets.

Our Values:

⚡ ENVIRONMENT AND SUSTAINABLE DEVELOPMENT

We are committed to reducing environmental impact at all stages of our operations. We develop and offer energy solutions that support a cleaner future and help our customers reduce their carbon footprint. We invest in long-lasting and resource-efficient technologies that enhance the management of renewable energy and promote the responsible use of natural resources throughout the production chain.

⚡ RESPONSIBILITY

Ethics and responsibility guide our decision-making and partnerships. We operate transparently, taking into account both social and environmental perspectives, while ensuring that our activities benefit both our customers and society at large. It is important to us that the technologies we offer are safe for both users and the environment.

⚡ INNOVATION

We continuously renew and improve our energy storage solutions by leveraging the latest technology. Innovation is at the core of our operations, and we always strive to find the best ways to serve our customers and support sustainable energy production.

⚡ COURAGE

Courage is at the heart of our mindset. To us, it means the ability to look ahead and take on challenges that can shape the future. We believe that the greatest progress comes when we dare to push boundaries and boldly seek new, better ways to harness energy and promote sustainable development.