About LeydenJar

LeydenJar Technologies aims to become world’s innovation leader in advanced battery anodes to energize batteries for progress. High energy density of battery cells is an urgent and unmet need for a wide range of industries from consumer electronics to electric vehicles. By addressing the bottleneck of the battery anode, LeydenJar can improve this by 70% in an industry that can only improve 3% per year. Our pure silicon anode is regarded as the holy grail to achieve in the battery industry. Progress is not only about enabling new products, it also means a more sustainable supply chain, resilience and access to battery technology in geopolitical context and enabling electrification.

Our business model is to provide pure silicon anode rolls that fit directly in the battery plants of cell partners, allowing our clients to make step change in their product performance, or to allow new product categories such as e-flight. Our immediate focus in on the consumer electronics industry, with first automotive application development starting in shortly. To produce pure silicon anodes, we have crossed over from semicon thin film technology (plasma deposition) to anode production. This has given us a unique product quality that can last long without the problems associated with silicon as a battery material. To produce this material at scale we have pioneered roll to roll production tools that we will deploy in PlantOne in Eindhoven, expected to open in 2026. We will produce rolls and validate the production tools, allowing us to ramp up to large commercial production in PlantTwo (location to be determined). Ramping up to become a leading player in the battery market is an enormous opportunity, but also daunting development that requires a team of energy dense professional leaders. 

We are looking for a dedicated intern on machine learning to create new insights within LeydenJar: You will be working within an entrepreneurial start-up - we are open-minded, data driven and innovative. You will be part of a young, international and ambitious team that is determined to make an impact towards a better world with cleaner energy. 

About the job

As a Machine learning/Data science intern in the Battery R&D team, you will play a key role in the development of new electrolytes to boost our anode’s performance. Currently we are scaling up our testing capabilities for electrolyte testing. We need you to help us make smart decisions and finding the optimal electrolyte. You will be working closely together with experienced battery scientists and data science professionals. The primary location for work will be Leiden. It is acceptable to work remotely one day a week. The minimum duration of the internship is 6 months. 

You can be responsible for: 

• Use our machine learning model to suggest new electrolyte formulations 

• Querry, join and clean data from our Azure database. 

• Implement new features in the machine learning model.  

• Test new models to improve the suggested electrolytes. 

• Make the machine learning model usable for our scientist.

Requirements

About you:

• University (WO) degree in a technical discipline e.g., Data Science, Computer Science, Engineering, Physics, Chemistry or similar. 

• You have prior experience in programming and machine learning, ideally with Python 

• You have experience with SQL and GIT or are willing to learn. 

• Good communication skills in English. 

• Experience in a mechanical and / or electrical lab is a plus. 

• Good skills in MS Excel / Word / PowerPoint, and fine with learning new IT apps. 

• You have a positive attitude and are full of energy. 

• You are enrolled in a university and need to complete an internship as part of your program. 

• A possible start date is the beginning of May. 

What can you expect from us ? 

• Unique experience in a rapidly scaling VC-backed start-up environment.

• Chance to work on potentially world-changing technology that can be a game changer to a range of industries and a key enabler for the energy transition.

• Great colleagues; at LeydenJar you will be part of a multi-national, ambitious, innovative and entrepreneurial team/20+ different nationalities!

Why LeydenJar?

🌟 Unleash your potential: Dive into a realm where personal growth meets ownership, with the backing to achieve your career aspirations.

💼 Benefits beyond the basics: Enjoy a treasure trove of perks and yes, there's fresh fruit every Monday because why not?

⏰ Work your way: Embrace the freedom of flexible hours and hybrid working. 

🍹 Thirsty for Fun: Join us every first Thursday for 'Thirsty Thursday,' where we unwind and share good vibes in a laid-back setting!

🎉 Fun with a purpose: Dive into our calendar of internal events, mixing business with pleasure, and fuel your personal development with exclusive trainings and courses.

Are you ready to take on the challenge as a Machine Learning/Data Science Intern ?

We are looking forward to your application!

If you'd like to learn more about LeydenJar amazing team, see below:

At LeydenJar we value diversity, and we provide equal opportunities to all applicants without regard to race, color, ethnicity, religion, gender, pregnancy/childbirth, age, national origin, sexual orientation, disability, etc. If there are two or more applicants of equal suitability for a certain position, LeydenJar can under circumstances decide to select applicants based on positive discrimination in full compliance with all relevant and applicable law.