Aeternum is an innovative sensor/engineering company with an office in central Liverpool developing next-generation IOT modular sensor systems. Join our creative multidisciplinary team and play a key role in building reliable, field-ready sensor solutions from the ground up.The Electrical Engineer will lead the design, development, and implementation of new sensor hardware, PCB design and embedded firmware for modular sensor systems. You will participate in the full product lifecycle—from concept and prototyping to field deployment and iterative improvement. This is a hands-on engineering role with opportunities for technical leadership and cross-functional collaboration. Requirements: Experience with embedded firmware development in C/C++ and version control (git). Strong background in sensor integration, analog/digital circuit design, and PCB layout. Experience with microcontroller platforms (e.g., Nordic NRF chips, ESP32, ARM Cortex-M, Cypress PSOC, STM32). Familiarity with implementing and optimizing edge algorithms on embedded devices.