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Posted Oct 22, 2026
Düsseldorf
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Salary (estimate)
Broad estimate: €44,000–€58,000/year
termios builds smart thermostats for real estate. Our product — termios Pro — replaces standard radiator thermostats in existing buildings, performs hydraulic balancing via a self-learning algorithm, and cuts heating energy consumption by up to 30%. No battery, no retrofitting: the device harvests energy from the temperature differential between radiator and room air (thermo-harvesting) and communicates over LoRaWAN.
The system runs at scale across multi-unit residential portfolios. Each thermostat is a constrained embedded device operating autonomously, syncing state through a LoRaWAN gateway to a cloud backend that runs the optimization logic. We're 35 people, growing, and the firmware team is small — your work ships directly to devices in real apartments.
The firmware running on our smart thermostats — from first commit to field rollout. You write code, solder, measure, debug. No handoffs to someone else when it gets hard.
Don't tick every box? Apply anyway.
We are a 35-person company — short path to decision-makers, real ownership
Hard problems: thermo management, energy harvesting, LoRaWAN at scale, OTA in the field
Every line of code runs on real devices in real homes and make real change.
No cover letter. CV + GitHub / project links if available.
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