Junior Embedded Software Engineer

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.

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.

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.

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 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