---
title: 'Mechanical Engineer at Thaleron'
canonical: 'https://feeny.ai/job/mechanical-engineer-thaleron-maidenhead-thqxx66gf6xd'
type: 'job'
last_seen: '2026-09-12'
---

# Mechanical Engineer at Thaleron

- **Company:** Thaleron
- **Location:** Maidenhead, United Kingdom
- **Employment:** full-time
- **Work type:** onsite
- **Posted:** 2025-12-17
- **Last confirmed live:** 2026-09-12
- **Apply:** https://jobs.ashbyhq.com/thaleron/ab69d7ab-de79-43c3-a368-30832740cdbe

## Job description

Who Are We? Thaleron is a driven team with significant financial backing developing an entirely new mechanical energy storage technology. We have proven it in the lab, and are now building our first scale prototypes. Our aim is not to just make a carbon-free grid cost-competitive with fossil fuels, but drastically cheaper. If we succeed, we will unlock the fourth industrial revolution.

## Your Team

We believe in small superstar teams, with high autonomy and responsibility. As a Mechanical Engineer at Thaleron, you’ll be part of a team of world experts, developing new concepts, rapidly building and testing to destruction. Our team is onsite in Maidenhead at least three days per week, creating an environment conducive to rapid innovation and seamless teamwork.

## Your Role

We're tackling a truly novel challenge: harnessing the power of physics to design and create a fundamentally better, more affordable way to store energy. We’re seeking Mechanical Engineers with a passion for theoretical problem-solving and for diving into complex mathematical equations. You'll play a pivotal role in shaping our cutting-edge experiments, modeling intricate rotating systems, and delivering innovative solutions that redefine what's possible.

What you need to succeed: Cultural:

- Very strong team player. Working well as part of our team is, if anything, more important than individual brilliance.
- A bias for action and getting hands-on work done

Technical:

- A strong background in Physics, Applied Mathematics, or Mechanical Engineering.
- Exceptional analytical skills to solve complex problems from first principles—calculating stresses, aerodynamic drag, inertia, and more.
- High spatial reasoning for accurate 3D conceptualization before CAD modeling

Candidate Journey:

1. Talent Screen - video call (30-45 minutes) - an introductory call with our Head of Talent.
2. Technical Interview - video call (60 minutes) - initial, technically focused interview with our Lead Engineer.
3. Onsite meeting (90 - 120 minutes) - in-person meeting with the team at our HQ in Maidenhead. You'll participate in a collaborative task and spend valuable time with the whole team. This process is designed to give you every chance to get the measure of us, and us of you. The various stages give you a fair opportunity to show your unique strengths and qualities, and enables each of us to establish if we’re a good fit for the other.

Please share with us any individual needs or reasonable adjustments we may need to make in advance of commencing the interview process with us.

## About Thaleron

## Company Overview
- **One-liner**: Thaleron is building cheaper mechanical energy storage to enable a 100% clean grid.
- **Entity Type**: Private (Pre-Seed / Seed stage)
- **Headquarters**: Innsbruck, Austria (with presence in United Kingdom and Portugal)
- **Founded**: 2022 (Incorporated 31 January 2022)
- **Founders**: Jorgen Tveit (Co-founder)

## Core Business
- **Primary industry**: Renewable Energy Equipment Manufacturing / Energy Storage
- **Target customers**: Utility companies, grid operators, and renewable energy developers (B2B / Enterprise)
- **Mission or purpose statement**: "Building cheaper mechanical energy storage to enable a 100% clean grid."

## Products & Services
- **Mechanical Energy Storage System**: A novel, low-cost mechanical solution based on proven technologies (likely flywheel-based, with patents related to flywheel energy storage) designed to provide grid-scale energy storage at significantly lower cost than current alternatives. The system is currently in prototype development.

## Market Standing
- **Valuation/Market Cap**: Not disclosed
- **Total Funding**: At least 2 funding rounds (Pre-Seed in March 2023 with 2 investors; Seed in November 2023 with 1 investor). Exact amounts not publicly available.
- **Notable Investors/Partners**: Investors are undisclosed. Key team members have backgrounds at Dyson, Imperial College London, UK Atomic Energy Authority, and First Light Fusion.
- **Growth Signals**: Very early-stage (5 employees, ~1,253 monthly website visits). The company is actively hiring for Mechanical and Electrical Engineers, indicating a push toward building a prototype. A Google patent related to flywheel energy storage was published in January 2024, suggesting active R&D.

## Competitive Advantages
- **First-principles engineering approach**: The team emphasizes a strong theoretical foundation and creative problem-solving, aiming to reinvent energy storage rather than incrementally improving existing technologies.
- **Proven technology base**: The solution builds on well-understood mechanical principles (flywheels), reducing technical risk compared to untested chemical or novel physics-based storage.
- **Small, elite team**: The company prioritizes hiring exceptional generalist engineers who can own designs end-to-end, fostering a high-agility, low-bureaucracy environment.

## Strategic Focus
- **Prototype development**: The immediate priority is building and testing a working prototype of their mechanical storage system.
- **Team building**: Actively recruiting senior mechanical and electrical engineers to accelerate development.
- **Unlocking the energy transition**: The long-term goal is to provide the missing piece for a 100% renewable grid by making storage economically viable.

## Why Work Here
- **High-impact mission**: Directly working on a critical problem for the energy transition and climate change.
- **Very hands-on, small team**: Engineers at all levels are expected to be deeply involved in building the prototype, offering significant ownership and impact.
- **First-principles culture**: The company values deep theoretical understanding and creative, resourceful problem-solving over following industry norms.
- **Remote-first with office hub**: Employees work remotely, with an office presence in Maidenhead, Berkshire, UK. The company is headquartered in Innsbruck, Austria, and has team members in Portugal.
- **Exceptional team**: Colleagues come from top engineering backgrounds (Dyson, Imperial College, UK Atomic Energy Authority, First Light Fusion), creating a high-caliber peer group.

## Sources
1. [thaleron.com](https://www.thaleron.com/)
2. [jobs.ashbyhq.com](https://jobs.ashbyhq.com/thaleron)
3. [linkedin.com](https://www.linkedin.com/company/thaleron)
4. [find-and-update.company-information.service.gov.uk](https://find-and-update.company-information.service.gov.uk/company/13883809)
5. [builtin.com](https://builtin.com/company/thaleron)

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