Senior Test Engineer / Manager
Skeleton Technologies
Company Overview
Skeleton Technologies Group OÜ
Tallinn, Estonia
2009
Approximately 300 employees across Estonia, Germany, and Finland (source: inforegister.ee). Revenue projected at €6.84 million for FY 2024 (source: inforegister.ee).
What They Do
Skeleton Technologies specializes in high-power energy storage solutions, leveraging its proprietary curved graphene nanomaterial to produce supercapacitors and hybrid SuperBatteries. Their innovative products are designed for a variety of applications, including AI data centers, transportation sectors such as automotive and maritime, grid stabilization, and industrial uses. As Europe's largest ultracapacitor manufacturer, Skeleton Technologies maintains full control over its value chain, from raw materials to software and patents, ensuring superior performance and reliability in their offerings (source: wikipedia.org). Their product lineup includes the SkelCap SCA series cells, which are UL 810A certified for safety in automotive and UPS applications, and the SkelStart engine start modules, which boast an impressive 2,000 cold-cranking amps and a lifespan of over 1 million cycles.
Projects & Track Record
Skeleton Technologies has a strong track record of notable projects, including the opening of the Großröhrsdorf Superfactory in 2017, which significantly scaled their ISO-certified module production capabilities. They launched the SkelStart in 2015, recognized as the world's most powerful engine starter, and have developed space capacitors for the European Space Agency since 2011. In 2024, they are set to power the NTT IndyCar Series with their advanced supercapacitors, showcasing their commitment to innovation in high-performance applications (source: skeletontech.com). Currently, they are working on the €220 million Leipzig Superfactory, which is expected to produce 12 million cells annually and create 420 jobs, with production slated to begin in 2024-2025.
Recent Developments
In the past two years, Skeleton Technologies has made significant strides, including the opening of its €220 million Leipzig Superfactory, which represents Estonia's largest industrial investment in Germany and aims to produce 12 million cells per year (source: balticvc.com). They secured a €108 million funding round in October 2023, led by Siemens and Marubeni, pushing their total funding over €300 million (source: skeletontech.com). Additionally, they acquired the former European Batteries facility in Varkaus, Finland, for SuperBattery production and established R&D operations there, further enhancing their capabilities in energy storage technology.
Working There
Skeleton Technologies offers a diverse range of roles across various departments, including module and software development, sales, finance, administration, manufacturing, and R&D. The company is actively hiring, particularly at its production sites, with the average employee count at the Estonian OÜ being approximately 98 in 2022, focusing on development and sales (source: inforegister.ee). The new Leipzig factory is expected to add 420 manufacturing positions, reflecting the company's rapid growth and expansion in the energy storage sector. The company culture emphasizes innovation, collaboration with universities, and a mission to electrify various sectors, supported by experienced leadership in energy storage technology.
Last updated on Feb 23, 2026 | Report an issue
Job Description
Skeleton is looking for a driven and experienced Senior Test Engineer / Manager to join our Advanced Engineering team.
Would you like to play a key role in ensuring the quality, safety, and reliability of our products? We are now looking for a Senior Test Engineer / Manager to take ownership of testing strategy, execution, and continuous development across multiple testing domains, including EOL, EMC, vibration, and destructive testing.
Responsibilities
- Develop and execute comprehensive testing strategies for products and systems
- Drive implementation of qualification programs (DV, PV) for customer and R&D projects
- Plan, execute, and oversee testing activities across EOL, EMC, vibration, and destructive testing
- Ensure test coverage, reliability, and alignment with product requirements
- Contribute to test method development and validation
- Analyse test data and provide root cause analysis for failures
- Design and implement testing frameworks, tools, and methodologies
- Develop and improve testing processes, documentation, and reporting practices
- Ensure safe operations in the testing laboratory in line with safety standards
- Support certification processes and compliance with industry standards
- Act as a technical lead and mentor for Test Engineers and Technicians
- Coordinate testing activities across different testing areas and teams
- Support resource planning and prioritization of testing work
- Work closely with R&D, product development, quality, and production teams
- Provide feedback from testing to support product improvements
Requirements
- Educational background in engineering (e.g. electrical, mechanical, or automation)
- Strong experience in product testing, validation, and failure analysis
- Experience in one or more testing domains (e.g. EMC, vibration, EOL, destructive testing)
- Several years of relevant experience in testing or product validation roles
- Understanding of testing standards and certification processes
- Ability to analyse complex technical data and drive conclusions
- Strong ownership and problem-solving mindset
- Good communication skills in English and Finnish
Benefits
- We offer flexible working hours, with the possibility of mobile working without core working hours and sufficient freedom for your own ideas.
- A flat hierarchy culture - fostering our great working atmosphere.
- A motivating opportunity for continuous growth at Skeleton.
- An additional day off every year for your birthday.
We're not just about energy storage. We're about redefining energy for a net-zero future, and we'd love for you to be a part of our journey.
Apply now
Job expired?Please let Skeleton Technologies know you found this job on Rejobs. It helps us grow and get more people working in renewable energy.
Apply now
Job expired?Please let Skeleton Technologies know you found this job on Rejobs. It helps us grow and get more people working in renewable energy.
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About the role
June 19, 2026
Full time
Company
- Lappeenranta, Finland
Several years of relevant experience in testing or product validation roles
UTC+03:00
