Your mission
We're developing next-generation wearable sensor technology that captures far more than standard metrics. Our goal is to give people deeper, more accurate insights into how they move.
Your role
As a Junior Embedded Software Engineer with 2–3 years of experience, you'll contribute to building and improving our firmware across a range of BLE-enabled wearable devices. Working alongside hardware, app, and data specialists, you'll help optimise low-power BLE systems and develop reliable firmware features. This is a hands‑on role with real ownership and plenty of room to grow.
Responsibilities
BLE Firmware Development
* Contribute to BLE stack development, supporting robust performance and low‑power operation.
* Implement and refine advertising and connection strategies under the guidance of senior engineers.
Low‑Power Firmware
* Write clean, well‑structured embedded C/C++ (FreeRTOS or bare‑metal), using state machines and peripheral management to help maximise battery life.
Communication Protocol Implementation
* Implement data synchronisation between BLE devices and smartphones (iOS/Android), handling connection interruptions and packet loss with support from the wider team.
Hardware/Firmware Interface
* Work with hardware engineers to validate peripherals (I2C/SPI buses, sensors, power management) and contribute to PCB bring‑up at the prototype stage.
Debug & Testing
* Use oscilloscopes, logic analyzers, and power profilers to identify and resolve firmware and hardware issues.
Your profile
What we're looking for
* 2–3 years of embedded C/C++ experience on resource‑constrained systems.
* Hands‑on BLE development experience, with exposure to low‑power implementations.
* Exposure to at least one product or project through multiple development stages (wearable, IoT, or similar).
* Familiarity with BLE‑to‑smartphone communication on iOS or Android, including basic data synchronisation and error handling.
* Zephyr RTOS preferred; FreeRTOS or bare‑metal background also considered. We're happy to bring you up to speed on Zephyr if needed.
* Comfortable using standard debug tooling (oscilloscope, logic analyzer, power measurement).
* Basic Python scripting or sensor interfacing experience is a plus.
* Familiarity with Git and CI workflows is a plus.
Why us?
Why you'll love working with us
* Work on truly meaningful tech with real impact
* Collaborative and friendly team environment
* Competitive salary and benefits
* Strong mentorship and room to grow technically
* Hybrid working with a Paddington‑based office
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