Senior Firmware Engineer

TN United Kingdom; London; Hybrid; GBP 50,000 - 65,000; Full time

Job summary

An innovative firm is on the lookout for a Senior Firmware Engineer to join their dynamic team. This role offers the chance to work on cutting-edge IoT products, focusing on developing embedded systems using Zephyr RTOS and optimizing communication protocols like BLE and LoRaWAN. You will play a crucial role in taking products from design to mass production, collaborating with cross-functional teams to deliver high-quality solutions. With a competitive salary and a hybrid work environment, this position is perfect for those looking to make a significant impact in the tech industry while enjoying a supportive and inclusive workplace culture.

Benefits

25 days + bank holidays

Pension

Cycle to Work Scheme

Social events

Inclusive workplace culture

Qualifications

• 5+ years of firmware engineering experience, with at least 2 years in Zephyr RTOS.
• Proficiency in C/C++ for embedded development.
• Strong understanding of embedded software development best practices.

Responsibilities

• Design, develop, and optimize firmware for embedded systems using Zephyr RTOS.
• Collaborate with hardware engineers to integrate firmware with hardware platforms.
• Lead firmware release cycles, including version control and documentation.

Skills

Firmware Engineering

Zephyr RTOS

C/C++ Programming

Bluetooth Low Energy (BLE)

LoRaWAN

ARM Cortex-M

Git

CI/CD

Automated Testing

Troubleshooting

Tools

JTAG

Oscilloscopes

Logic Analyzers

Protocol Sniffers

Job description

The job description provides comprehensive information about the company, role, responsibilities, and requirements. However, it contains some inconsistencies and irrelevant details, such as references to social network login prompts and some repetitive content. To improve clarity and focus, I will remove the social network prompt and streamline the content, ensuring it remains professional and engaging.

Here is the refined version:

About Converge

Converge was founded by Raph and Gideon in late 2014 to help build the future of construction more efficiently, safely, and sustainably. We focus on concrete, which accounts for 8% of global carbon emissions, through our hardware-enabled SaaS products: ConcreteDNA and PrecastDNA. Our team is diverse and dedicated to transforming construction practices for a sustainable future.

Role Overview

We are seeking a highly skilled Senior Firmware Engineer to develop embedded systems for IoT products. The ideal candidate will have extensive experience with Zephyr RTOS, Bluetooth Low Energy (BLE), and LoRaWAN, with a proven track record of taking products from design to mass manufacturing and long-term maintenance.

Responsibilities

• Design, develop, and optimize firmware for embedded systems using Zephyr RTOS.
• Implement and maintain BLE and LoRaWAN communication protocols.
• Collaborate with hardware engineers to integrate firmware with hardware platforms.
• Develop and execute unit tests, integration tests, and validation frameworks.
• Optimize power consumption and memory footprint for embedded devices.
• Troubleshoot and debug firmware issues using JTAG, oscilloscopes, logic analyzers, and protocol sniffers.
• Work with cross-functional teams to define and deliver product requirements.
• Lead firmware release cycles, including version control, documentation, and deployment.
• Support manufacturing and testing to ensure firmware stability in high-volume environments.

Requirements

• 5+ years of firmware engineering experience, with at least 2 years in Zephyr RTOS.
• Proficiency in C/C++ for embedded development.
• Experience with ARM Cortex-M microcontrollers and associated toolchains.
• Strong understanding of embedded software development best practices, including Git, CI/CD, and automated testing.
• Proven experience shipping products from concept to mass production.

Nice to Haves

• Expertise in BLE, including GATT, GAP, and power optimization.
• Knowledge of LoRaWAN stack and radio performance tuning.
• Experience with DFU mechanisms and OTA updates.
• Familiarity with wireless certification processes and compliance testing.
• Experience with secure bootloaders and embedded security protocols.
• Knowledge of sensor interfacing protocols (SPI, I2C, UART, CAN).
• Low-power design techniques for battery-operated devices.
• Cloud integration and edge computing experience.
• Strong problem-solving skills and adaptability in a fast-paced environment.

Additional benefits include a competitive salary of up to £65k, hybrid work environment, 25 days + bank holidays, pension, Cycle to Work Scheme, social events, and an inclusive workplace culture.