Senior Embedded Software Engineer

A London product company building connected industrial hardware needs a senior engineer to own the firmware on its next platform. Fully remote within the UK, with the hardware shipped to you and roughly one day a month on site if you want it.

CC++ARM Cortex-MFreeRTOSEmbedded LinuxSPI / I2C / CAN

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Ref: SEM-2601
Salary: £70,000
Location: London
Working: Fully remote
Type: Permanent
Discipline: Embedded & firmware

The role

This is the senior firmware seat on a small team, not a pair of hands on someone else's architecture. The current platform is an ARM Cortex-M device talking to a sensor front end and a cloud backend, and the next generation is being specified now. You would own how the firmware is structured, what the update story looks like, and how it gets tested.

The team is four engineers: two firmware, one hardware, one backend. There is a real product in the field, so you will inherit code that works and has constraints attached rather than a blank sheet.

What you would be doing

Owning the firmware for a Cortex-M based product, in C with some C++
Designing the next-generation architecture: task structure, drivers, update path
Writing and reviewing drivers over SPI, I2C, UART and CAN
Taking new board revisions through bring-up with the hardware engineer
Building out the automated test rig so regressions are caught before the field catches them
Mentoring one mid-level firmware engineer, properly rather than nominally

What the client needs

Several years writing production firmware in C for ARM Cortex-M
An RTOS in anger (FreeRTOS, Zephyr or similar), and knowing when not to use one
Driver work from the datasheet up, not just calling a vendor HAL
Board bring-up: a scope and a logic analyser are things you reach for, not things you have heard of
Shipped at least one product to production and dealt with what came back

Useful, not essential

Embedded Linux or Yocto on a second core or gateway device
Bootloaders, OTA update and secure boot
Low-power design, battery budgets and sleep-mode debugging
Experience setting up hardware-in-the-loop test

What is on offer

£70,000
Fully remote in the UK, with hardware sent to you
Permanent, full time
Equipment budget including bench kit
25 days plus bank holidays

Who it suits

If you are a mid-level engineer who has not yet owned an architecture, this one will be a stretch and the client has been clear about that. If you have been senior for years and want to move further toward management, say so early: this role stays hands-on.

How to apply

Use the form below, or email s.mirza@semtalent.co.uk quoting SEM-2601, or call 07359 446772. Your CV is not sent to the client, or anyone else, until you have heard who they are and said yes.

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