Engineer
Location: Tallinn, Estonia (On-site)
Employment Type: Full-Time
Start Date: August 2025
Your Impact
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As an Engineer at Jälle Technologies, you’ll play a key role in turning our lab processes into real, working production systems.
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You’ll design, build, and refine equipment and setups for our pilot line, troubleshoot issues, and help optimize operations for safety, reliability, and efficiency. Your work will make sure our recycling technology can scale up from experimental to practical use.
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By taking ownership of the technical side, you’ll help bridge the gap between research and real-world impact—making sustainable battery recycling a reality.
About the position
What you'll do
As an Engineer at Jälle Technologies, you will play a hands-on role in building and scaling up the technologies that turn battery waste into valuable raw materials:
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Design, build, and test components of our pilot production line for lithium recovery and rGO production.
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Collaborate with scientists and engineers to scale up lab processes into continuous-flow operations.
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Select and integrate equipment for thermal, mechanical, and chemical treatment stages.
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Troubleshoot technical issues and optimize process parameters for performance, safety, and cost.
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Support installation, commissioning, and operation of new process equipment.
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Ensure that all systems meet environmental, health, and safety standards.
What we're looking for
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Degree in Mechanical Engineering, Chemical Engineering, Process Engineering, or a related field.
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Hands-on experience with prototyping, equipment integration, or process scale-up.
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Comfortable working in a lab/pilot production environment.
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Familiarity with reactors, pumps, filtration systems, or high-temperature processing.
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Strong analytical and problem-solving skills; detail-oriented and pragmatic.
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Proficient in English; Estonian is a plus.
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Nice-to-have
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Previous experience in cleantech, battery recycling, or chemical manufacturing.
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CAD and process simulation skills (e.g., SolidWorks, COMSOL, Aspen Plus).
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Knowledge of corrosive materials handling and safety design.
What we offer
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A rare chance to help build pioneering clean technologies from the ground up.
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Work on real hardware solving real sustainability problems in a fast-moving environment.
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Competitive salary in a purpose-driven startup.
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A supportive team of scientists, engineers, and entrepreneurs.
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The opportunity to shape the technical backbone of Europe’s circular battery economy.
Jälle Technologies is on a mission to transform battery waste into next-generation materials. We’re developing breakthrough solutions to recover critical metals and upcycle battery waste from used lithium-ion batteries into a material with game-changing applications in energy storage, electronics, coatings, and more.
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Backed by deep scientific expertise, grant funding, and initial industry partnerships, we’re scaling our lab innovations into an industrial reality.
Send us your CV and a short motivation letter