---
title: 'Thermal Systems & Mechanical Engineer at Flux Mobility'
canonical: 'https://feeny.ai/job/thermal-systems-mechanical-engineer-flux-mobility-winterthur-gj1m8wf4916b'
type: 'job'
last_seen: '2026-09-07'
---

# Thermal Systems & Mechanical Engineer at Flux Mobility

- **Company:** Flux Mobility
- **Location:** Winterthur, Switzerland
- **Work type:** onsite
- **Posted:** 2026-09-02
- **Last confirmed live:** 2026-09-07
- **Apply:** https://jobs.lever.co/flux-mobility/14760919-7745-4135-b718-e547483830af

## Job description

Our Team. A strong team is the DNA of our company. Our team brings together experts in Mechanical Engineering, Software, E/E, Manufacturing, Homologation, Testing, Purchasing, Business Development, and Sales & Marketing. At Flux, we work as equals and foster a highly motivating environment shaped by shared ownership, flat hierarchies, and a strong team spirit. Here, you will not only develop your skills, but also make a real impact. Join our team and help shape the mobility of tomorrow.

Your role. We are looking for an experienced Thermal Systems & Mechanical Engineer to take technical ownership of the thermal management of our electric light commercial vehicles and the mechanical design that goes with it. In this role, you own the thermal architecture of the vehicle: battery cooling and heating, power electronics and e-motor cooling, cabin climate, and the coolant and refrigerant circuits that connect them. You size these systems, design and integrate the mechanical hardware (pumps, valves, heat exchangers, lines and mounts) and make sure they work together across the full operating range, from alpine winters to fully loaded summer duty cycles. You work closely with our mechanical, electrical and software teams. You define the thermal requirements and operating strategy together with software, and support development from concept through simulation and calculation to verification in the vehicle and in the field. At Flux, you will work in a small team with short decision-making paths. You take ownership of technical decisions early and directly shape the architecture of our vehicles.

What you can contribute.

- Take technical ownership of the vehicle's thermal architecture: battery thermal management, power electronics and e-motor cooling, cabin HVAC, and the associated coolant and refrigerant circuits.

- Size and design cooling and heating systems, including pumps, valves, radiators, chillers, heat exchangers, expansion tanks, lines and heat pump and refrigerant circuits.

- Carry out thermal sizing and simulation (1D system simulation and, where needed, CFD) and correlate models against component and vehicle test data.

- Design and integrate the mechanical hardware of the thermal system into the vehicle (packaging, mounting, routing and interfaces to the vehicle structure) together with the design team.

- Define the thermal requirements and thermal operating strategy together with the software team.

- Plan and lead thermal verification and validation: component tests, climatic-chamber testing and on-vehicle testing in hot and cold conditions, in collaboration with external partners.

- Work with suppliers of thermal components (compressors, pumps, heat exchangers, HVAC units) on selection, specification and validation.

- Support aftersales and the field team with thermal-related field issues and root-cause analysis.

- Analyse test and field data to continuously improve the thermal and mechanical design.

How you will succeed in this role.

- Degree in mechanical engineering, automotive engineering, mechatronics, process/energy engineering or a comparable discipline.

- At least 5 years of industry experience in thermal systems or thermal management, ideally in automotive or a comparably demanding industry.

- Practical experience with vehicle thermal management topics such as battery cooling, HVAC/climate, refrigerant circuits or heat pump systems.

- Experience with thermal and 1D system simulation tools (e.g. GT-SUITE, KULI, Simcenter Amesim or Simscape) and with correlating models to test data.

- Solid mechanical design skills and a good understanding of fluid systems e.g. pumps, valves, heat exchangers and coolant/refrigerant circuits.

- Experience working with suppliers and development partners.

- Ability to take technical ownership and systematically develop complex systems.

- Enjoy working across disciplines in a pragmatic, fast-moving team.

Your environment.

At Flux, we develop electric commercial vehicles in small, highly responsible teams. Our vehicles are already operating in the real world, on construction sites, in cities and in the daily operations of our customers.

That means decisions are made close to the product. Engineers take responsibility for their systems throughout the entire development cycle, from concept and testing through to issues seen in the field.

If you enjoy developing robust thermal and mechanical solutions, taking ownership and working in an environment where execution matters more than hierarchy, this role is a good fit for you.

About Flux. Flux Mobility AG was founded in April 2021. Our mission is to develop high-quality light commercial vehicles with innovative, emission-free drivetrain technologies and to electrify specialist vehicles in Winterthur. Our vehicles are built on a flexible platform concept that enables the direct replacement of diesel vehicles on a one-to-one basis. In doing so, we are helping to drive the sustainable transformation of industrial mobility and enabling companies to realise the full potential of electric mobility.

## About Flux Mobility

## Company Overview
- **One-liner**: Flux Mobility develops and electrifies light commercial vehicles, offering fully electric all-wheel drive conversions of MAN chassis with high payload and range, designed as one-to-one diesel replacements.
- **Entity Type**: Private (Startup, founded in 2021)
- **Headquarters**: Winterthur, Switzerland (Klosterstrasse 34, 8406 Winterthur)
- **Founded**: April 2021
- **Founders**: Duga Hoti (CEO, President) and Bill Zollinger (Co-founder, Electrical Development)

## Core Business
- Primary industry: Electric vehicle manufacturing / Light commercial vehicle electrification
- Target customers: B2B – commercial fleets, municipalities, logistics companies, and special vehicle operators (e.g., municipal technology, freight)
- Mission: "develops and designs high-quality light commercial vehicles with innovative, emission-free drive technologies for uncompromising and safe use in all areas" [en.fluxmobility.ch](https://en.fluxmobility.ch/company/ueber-flux)

## Products & Services
- **Flux Electric Commercial Vehicle (MAN Chassis Conversion)**: Electrification of MAN panel vans, single/double cabs, and special vehicles. Includes fully electric all-wheel drive, 112 kWh gross battery capacity, WLTP range up to 480 km, real-world range up to 320 km at full payload, payload up to 2,500 kg, trailer load up to 3,500 kg, and 56 kW electric power take-off. Customization options available. [en.fluxmobility.ch](https://en.fluxmobility.ch/)
- **Vehicle Electrification Service**: Conversion of existing MAN chassis to electric drivetrain, taking 7–10 days per vehicle, with development and production in Winterthur. [en.fluxmobility.ch](https://en.fluxmobility.ch/)

## Market Standing
- **Valuation/Market Cap**: Not publicly available
- **Key Metric**: Not disclosed (private, no funding rounds mentioned in search results; however, the company received support from the Swiss Federal Office of Energy (SFOE) as part of a pilot and demonstration program) [en.fluxmobility.ch](https://en.fluxmobility.ch/company/ueber-flux)
- **Notable Investors/Partners**: Aebi Schmidt Group (through Henning Schröder, Head of Group Technology), Designwerk (previous employer of founders), MAN (chassis partner), Swiss Federal Office of Energy (SFOE) [en.fluxmobility.ch](https://en.fluxmobility.ch/company/ueber-flux)
- **Growth Signals**: Active recruitment for multiple engineering and operations roles (Senior Mechanical Engineer, Vehicle Systems & Homologation Engineer, Customer Care Manager, Operations Buyer, etc.) [jobs.lever.co/flux-mobility](https://jobs.lever.co/flux-mobility); claims "broadest portfolio of light electric commercial vehicles on the market" [en.fluxmobility.ch](https://en.fluxmobility.ch/)

## Competitive Advantages
- First fully electric all-wheel drive in its segment
- High payload (2,500 kg) and trailer load (3,500 kg) – comparable to diesel equivalents
- Long range (up to 480 km WLTP) with large battery capacity
- Swiss engineering and quality promise – all development and electrification done in Winterthur
- Customization for special vehicles (municipal, freight, etc.) and one-to-one diesel replacement without compromise

## Strategic Focus
- Continue developing and expanding the electric light commercial vehicle portfolio
- Serve both standard panel vans and specialized vehicles (e.g., municipal technology, superstructures)
- Leverage partnerships (MAN, Aebi Schmidt Group) and public funding to scale production and R&D
- "Always think about the vehicles of the day after tomorrow" [en.fluxmobility.ch](https://en.fluxmobility.ch/company/ueber-flux)

## Why Work Here
- **Culture**: "The Flux team is motivated and works with vision. We help and support each other and take responsibility." [en.fluxmobility.ch](https://en.fluxmobility.ch/company/karriere)
- **Impact**: Every employee can make a difference; opinions are valued; projects and ideas can be turned into reality quickly.
- **Flexibility**: Flexible working hours and home office possible (where job allows) [en.fluxmobility.ch](https://en.fluxmobility.ch/company/karriere)
- **Work Environment**: Most roles are on-site in Winterthur; engineering is the top priority.
- **Notable Perks**: Not explicitly listed, but the company is backed by public innovation funding and offers a chance to work on cutting-edge electric vehicle technology.

## Sources
1. [jobs.lever.co/flux-mobility](https://jobs.lever.co/flux-mobility)
2. [en.fluxmobility.ch/company/ueber-flux](https://en.fluxmobility.ch/company/ueber-flux)
3. [en.fluxmobility.ch/company/karriere](https://en.fluxmobility.ch/company/karriere)
4. [en.fluxmobility.ch/](https://en.fluxmobility.ch/)

## Other roles at Flux Mobility

- [Field Engineer](https://feeny.ai/job/field-engineer-flux-mobility-winterthur-xah690vfww6c) — Winterthur, Switzerland
- [Softwareingenieur:in (m/w/d)](https://feeny.ai/job/softwareingenieur-in-m-w-d-flux-mobility-winterthur-sb2g5ax5mjtp) — Winterthur, Switzerland
- [Konstrukteur:in](https://feeny.ai/job/konstrukteur-in-flux-mobility-winterthur-14xap9h4am1t) — Winterthur, Switzerland
- [Customer Care Manager/in – im Einsatz für Qualität & Bewegung](https://feeny.ai/job/customer-care-manager-in-im-einsatz-fur-qualitat-bewegung-flux-mobility-jjm9xcs0gnj8) — Winterthur, Switzerland
- [Senior Maschinenbauingenieur:in elektrischer Antriebsstrang](https://feeny.ai/job/senior-maschinenbauingenieur-in-elektrischer-antriebsstrang-flux-mobility-7thkq0ddtv7s) — Winterthur, Switzerland