Lead Firmware Developer

2 weeks ago

Edinburgh EH EG, United Kingdom Una Watch Full time £60,000 - £80,000 per year

About Us:

At UNA, we believe that the technology we use on a daily basis should be open and accessible. It should be repairable and customisable. Let's move away from treating our gadgets as black boxes that we have no control over and instead of throwing away our tech when something breaks, let's empower users to fix and even upgrade their own devices.

UNA's first product is a GPS sports watch with a difference – the watch is modular, repairable and upgradeable. We also have a Software Development Kit for the watch, allowing third-party developers to create their own apps. The founding team have a strong product design background with many years of experience in wearable design.

Following a successful Kickstarter launch, our watches will be soon be in the hands of our first customers. Throughout 2026, we plan to launch a series of software updates, as well as develop new products.

Our office is based near Haymarket, Edinburgh. This role can be fully remote, hybrid or office-based.

Job Description:

You will initially work with two senior firmware engineers who have developed Una's firmware to-date, contributing to new features. Una's firmware is built with C++.

As your familiarity with the codebase grows, you will assume leadership of our firmware roadmap.

Running on an STM32 microcontroller, Una's firmware is built on top of a customised version of FreeRTOS, and is divided into a kernel and applications. Our applications are divided into 4 categories: activities (running, hiking, cycling), utilities (stopwatch, alarm), glances (instant heart rate) and clockfaces. You will contribute to both the kernel and application development.

You will also work closely with our in-house team of electronics engineers, mechanical engineers and product designers, as well as our mobile development partners.

Key Responsibilities:

  • Develop the UNA kernel, low-level drivers and applications in C++
  • Define and maintain the firmware architecture
  • Drive forward improvements in sensor tuning and power efficiency
  • Manage external team of firmware developers
  • Work with mobile app team

Skills and Qualifications:

  • Highly proficient in C++
  • Excellent grasp of electronics schematics and datasheets
  • Experience with consumer products
  • Good communicator who can work with the the various other engineering disciplines
  • Passion for running/cycling and wearable technology is a large plus

What We Offer:

  • Become an integral part of a growing start-up company
  • Work closely with an experienced product design team

Job Type: Full-time

Pay: £60,000.00-£80,000.00 per year

Benefits:

  • Cycle to work scheme
  • Employee discount

Experience:

  • C++: 8 years (preferred)

Work Location: Hybrid remote in Edinburgh EH3 8EG

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