Data Science Intern

Intern / Student, Full-time · Berlin

About The Role
As Data Science Intern at Juna AI, you’ll work closely with our technical founder and engineering team to support the development of our core machine learning capabilities. You’ll help process industrial sensor data, explore modeling techniques, and contribute to training and evaluating AI agents in real-world manufacturing settings. This is a rare opportunity to work at the frontier of applied AI – where your code will directly impact energy use, emissions, and efficiency in sectors like steel, chemicals, and cement. If you're excited about bringing advanced ML into messy, high-stakes real-world environments, this role is for you.

Core Responsibilities
  • Data Processing: Build tools to clean, structure, and analyze time-series data from industrial processes
  • Model Development: Support training and evaluation of AI models, including reinforcement learning and optimization techniques
  • Simulation & Testing: Contribute to simulating process environments and validating model performance
  • Research & Prototyping: Work on experimental features and explore new approaches to modeling and control
  • Collaborate Across Teams: Work with engineers and researchers to bring your ideas into production workflows
About You
Tech Excellence
  • ML Fundamentals: BSc/MSc in Computer Science, Data Science, Mathematics, Physics, or related; solid Python skills and initial hands-on experience with ML frameworks (PyTorch, TensorFlow, JAX)
  • Hands-On Skills: Rapid prototyping—turning ideas into working code; practical experience working with time-series and sensor data
  • Data Fluency: Cleaning, exploring, and visualizing large, unstructured datasets; basic familiarity with numerical modeling or simple control systems (e.g., PID)
  • Bonus: Early exposure to reinforcement learning or real-time AI agents
Personal Qualities
  • Curious and analytical – excited to learn fast and dig into hard technical challenges
  • Pragmatic – able to turn ideas into code, even in early or imperfect environments
  • Collaborative and open to feedback, with a strong sense of ownership
  • Motivated by real-world impact and building things that actually get used
What we offer
  • Impactful Experience: Work on real-world projects that directly reduce energy use and emissions in heavy industries.
  • Mentorship & Learning: Pair with senior AI engineers and our technical founder for hands-on guidance and career growth.
  • Startup Culture: Join a flat, fast-moving team where your ideas shape the product from day one.
  • Industry Exposure: Gain deep insights into how AI powers manufacturing, steel, chemicals, and cement sectors.
  • Competitive Compensation: Receive a market-competitive salary.
Life At Juna
We operate on the factory floor, not in slide decks. At Juna, you’ll solve high-stakes problems in the real world – chemical plants, paper lines, steel mills  – and cut emissions of the biggest polluting industries in the world. We move fast, work face-to-face, and care about outcomes and solving customer problems. Juna is the place where you’ll experience the most impactful and productive time of your career.
About us
Juna AI is revolutionizing heavy industries by leveraging AI-enabled autonomous agents to decarbonize and optimize industrial processes. Our mission is to transform complex manufacturing facilities into intelligent, self-learning systems that operate autonomously, delivering significant improvements in plant performance and sustainability. Our AI-based control system learns from sensor data to control complex processes in real time across industries like chemical, steel, paper, cement, and textile. 

Juna’s founders, Matthias Auf Der Mauer and Christian Hardenberg, are serial entrepreneurs with a proven track record of founding successful startups, developing advanced AI and IoT applications, and scaling technology solutions globally for over 100 million users. They have led engineering teams of up to 2,500 engineers, launched more than 50 internet companies, and introduced transformative AI technologies to the manufacturing sector. Backed by extraordinary investors like Kleiner Perkins and Norrsken VC – the same backers behind companies like Google, Amazon, and Twitter – we are poised to make a significant impact on the future of industrial automation.
Your application!
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