Embedded Software Engineer (Mid - Senior)

TN United Kingdom; London; Hybrid; GBP 40,000 - 80,000; Full time

Job description

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Embedded Software Engineer (Mid - Senior), London

Client:

Location:

London, United Kingdom

Job Category:

Other

EU work permit required:

Yes

Job Reference:

f1b9f95cfe16

Job Views:

3

Posted:

18.04.2025

Expiry Date:

02.06.2025

Job Description:

Your mission

We're Hiring an Embedded Software Engineer for a Stealth Startup.

As an Embedded Software Engineer, you’ll be working closely with hardware, app, data, and machine-learning specialists. You’ll optimise ultra–low-power BLE systems to deliver reliable, high-performance firmware. The impact? A wearable that truly stands out in a busy marketplace.

Your profile

Your Role

Responsibilities

• BLE Firmware Development
  • Own and optimise the BLE stack (BLE-enabled MCU family), ensuring robust performance and ultra-low power operation.
  • Develop advertising and connection strategies that balance user experience with efficient battery usage.
• Low-Power Firmware Architecture
  • Design and implement embedded code (FreeRTOS or bare-metal) using well-defined state machines, peripheral management, and sleep modes to maximise battery life.
• Robust Communication Protocol Design
  • Architect reliable data synchronisation strategies between BLE devices and smartphones (iOS/Android).
  • Handle connection interruptions, packet loss, and bandwidth constraints while preserving data integrity and battery efficiency.
• System Bring-Up & Debug
  • Work closely with hardware engineers to bring new PCBs from prototype to stable operation (validating I²C/SPI buses, power management, sensors, etc.).
  • Use oscilloscopes, logic analysers, and power profilers to identify and resolve firmware or hardware issues.
• Hardware/Firmware Interface
  • Specify microcontroller requirements, pin mappings, and hardware abstraction layers; liaise with hardware teams without taking on full PCB design responsibilities.
• Production Readiness & Optimisation
  • Drive firmware towards a production-ready state: implement OTA/DFU, logging, watchdog strategies, and power profiling.
  • Ensure smooth integration with manufacturing processes (test points, production flashing, etc.) and plan for commercial-scale deployment.
• Cross-Team Collaboration
  • Work with backend/data engineers on data formats, synchronisation protocols, and system-level decision-making.
  • Provide technical insights on hardware capabilities and constraints to inform product design and planning.

What We’re Looking For

• 5+ years of embedded C/C++ experience on resource-constrained systems.
• Hands-on BLE development across BLE-enabled MCU families, with a proven track record in low-power implementations.
• End-to-End Product Involvement: Demonstrated experience contributing to the lifecycle of at least one commercial product (wearable, IoT, or similar) from prototype to market release.
• BLE-to-Smartphone Communication (iOS/Android):
  • Proven data synchronisation strategies for intermittent connections.
  • Error recovery mechanisms for poor-quality or dropped links.
  • Data persistence and local storage optimisation on embedded devices.
  • Bandwidth-efficient data serialisation methods.
  • Familiarity with smartphone BLE nuances and background operation modes.
• Low-Power Debug & Tooling: Experienced with oscilloscopes, logic analysers, and power measurement for debugging and testing.
• RTOS Experience: Proficiency in Zephyr or FreeRTOS, or strong bare-metal coding background.
• Familiarity with OTA/DFU processes, memory constraints, and manufacturing considerations.

Optional

• Continuous Integration: Advanced Git workflows, automated build/test pipelines, and version control best practices.
• Bonus: Basic Python scripting, data pipeline integration, or sensor interfacing experience.

Why us?

Benefits:

• Competitive salary and performance-based incentives.
• Flexible work arrangements, including remote options.
• Collaborative and inclusive work environment.

If you’re ready to tackle the challenge of developing low-power firmware for an innovative wearable, we’d love to hear from you. Send us your CV and a cover letter on why this excites you.

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Created on 18/04/2025 by TN United Kingdom