Skip to content
CV Rocket
Get started
How it worksThe enginePricingBlogContactSign in

Open nowPosted 9 hours ago

Embedded Firmware Engineer

Octopus Energy Group157 open roles

Where
Remote (GB)
Get the CV for this job

From $25 per CV, paid once. No subscription.

Your applicationOpen nowEmbedded Firmware EngineerOctopus Energy Group · Remote (GB)

  1. YouYes, apply to this one.

  2. CV RocketCV written for this posting.

  3. 25 readersRecruiter, hiring manager, skeptic. Round after round.

  4. CV RocketApplied on Octopus Energy Group's own form.

The reply lands in your private mailbox

3×more interviews than doing it yourself with ChatGPT.

The clock on this job

Early applications get read.

8.1% of postings close within 7 days. Measured by our own scanner across the market. Octopus Energy Group postings stay open a median of 1 days.

Share of postings closed within
  1. 1.7%1 day
  2. 3.6%3 days
  3. 8.1%7 days
  4. 15.0%14 days
  5. 33.9%30 days
This job: posted 9 hours ago

Octopus Energy Group median: 1 days open

The posting

Octopus are pioneering new smart home technology and we are looking to continue to grow our highly passionate team.

We’re looking for a skilled Embedded Firmware Engineer specialising in IoT products to shape the software driving our next generation of Smart Home Wi-Fi connected products. Working within our multi-talented hardware team, you’ll help build innovative, energy-saving smart devices that keep homes warm and lower energy bills.

Collaborating across platform and app engineering teams, you will drive the firmware lifecycle from taking initial requirements to hands-on development and ongoing field deployment.

This role can be majority remote with occasional travel to London and Slough!

If you want to be a part of the next big thing - keep reading!

What you'll do

  • Write well structured, testable, efficient and maintainable software for Octopus’ connected devices
  • Work within a dedicated cross-functional team on key products for our customers or our internal teams.
  • Take ownership of our IoT products and features, ensuring delivery of high quality code that is modular and maintainable
  • Manage tickets and development efforts with the hardware and software teams
  • Work closely with other customer facing and software teams to investigate and resolve bugs and implement new features
  • Participate in code reviews and ensure code is meets a high standard
  • Work flexibly across projects to meet challenging, customer-driven deadlines
  • Willingness to learn new technologies and skills as require

What you'll need

  • Proficiency in C for real-time operation on highly constrained microcontrollers and custom hardware using official vendor APIs
  • Hands-on experience with Real-Time Operating Systems (RTOS), such as FreeRTOS
  • Fluency in scripting languages (e.g., Python, Bash) and version control using Git
  • Ability to read schematics and data sheets for hardware and software debugging
  • Practical knowledge of common serial protocols (e.g., SPI, I2C, UART, RS232, Modbus) and networking fundamentals (e.g., MAC, IP, TCP, TLS, DHCP)
  • Familiarity with IoT security technologies, such as secure boot, encrypted flash, TLS, and public key cryptography
  • Hands-on experience with board bring-up, design validation, code optimization, and debugging via JTAG/SWD or test equipment (e.g., oscilloscopes, multimeters, logic analyzers)
  • B.S. in Computer Science, Electronic Engineering, or a related field

Nice to haves

  • Hands-on experience with the ESP32 family and ESP-IDF
  • Background building IoT products with cloud platforms (e.g., AWS IoT)
  • Experience implementing OTA firmware updates within automated build environments
  • Exposure to short-range wireless protocols including BLE, Wi-Fi, or Zigbee
  • Proven experience delivering connected IoT devices within complex, multi-system ecosystems

Why else you'll love it here

• Wondering what the salary for this role is? Just ask us! On a call with one of our recruiters it's something we always cover as we genuinely want to match your experience with the correct salary. The reason why we don't advertise is because we honestly have a degree of flexibility and would never want salary to be a reason why someone doesn't apply to Octopus - what's more important to us is finding the right octofit!

• Octopus Energy Group is a unique culture. An organisation where people learn, decide, and build quicker. Where people work with autonomy, alongside a wide range of amazing co-owners, on projects that break new ground. We want your hard work to be rewarded with perks you actually care about! We were named the UK's top company to work for in 2025, and we ranked in the top ten in the Sunday Times Best Places to Work 2026. Our Group CEO, Greg has recorded a podcast about our culture and how we empower our people. We’ve also been placed in the top 10 companies for senior leadership

• Visit our UK perks hub - Octopus Employee Benefits

If this sounds like you then we'd love to hear from you, tell us what you care about, why Octopus feels right and most importantly, bring us the real you! Applying for jobs can be a bit scary so have a nose through some of our tips first 🚀

P.S. Our process usually takes up to 4 weeks, but we’ll always do our best to flex around what works for you. Along the way, you’ll chat with our recruitment team and your Recruiter will help you throughout different stages. Got any burning questions before then? Drop us a message at [email protected] and we’d love to help!

Are you ready for a career with us? We want to ensure you have all the tools and environment you need to unleash your potential. Need any specific accommodations? Whether you require specific accommodations or have a unique preference, let us know, and we'll do what we can to customise your interview process for comfort and maximum magic!

Studies have shown that some groups of people, like women, are less likely to apply to a role unless they meet 100% of the job requirements. Whoever you are, if you like one of our jobs, we encourage you to apply as you might just be the candidate we hire. Across Octopus, we're looking for genuinely decent people who are honest and empathetic. Our people are our strongest asset and the unique skills and perspectives people bring to the team are the driving force of our success. As an equal opportunity employer, we do not discriminate on the basis of any protected attribute. Our commitment is to provide equal opportunities, an inclusive work environment, and fairness for everyone.

From $25, paid onceGet the CV for this job

What happens when you press

One press. We do the rest.

  1. A CV for this posting

    Written against Octopus Energy Group's own wording, from every piece of relevant proof in your profile.

  2. 25 readers review it

    Recruiter, hiring manager, skeptic and more read every draft, round after round. You get the best round.

    The review screen in CV Rocket: how each CV was read, round by round.

  3. We apply on Octopus Energy Group's form

    Our application engine gets through the hardest forms there are. Where a question needs you, AI suggests the best answer. Don't want us applying from our IP addresses? Use our Chrome extension: we apply straight from your own browser.

    An application in CV Rocket: every answer filled in on the employer's form.

  4. Every reply, sorted

    Octopus Energy Group's answer lands in your private mailbox, and we classify it on arrival: interview, question, rejection.

    The CV Rocket inbox: each employer reply classified as an interview, an action or a rejection.

  5. Reply with AI

    AI helps you write the email, checks it and sends it. We show you whether the recruiter read it.

  6. The interview in your calendar

    Full integration with your calendar. The invitation goes straight in.

    An interview invitation in the CV Rocket inbox, added to the candidate's calendar.
Get the CV for this job

From $25 per CV, paid once. No subscription.

Why it works

3×

more interviews than doing it yourself with ChatGPT.

ChatGPT writes a CV and never learns what happened to it. We see every reply. For each CV we know:

  • How it was written, and how the review scored it
  • When we applied, and how long after the posting went up
  • Which posting, which company, which city
  • Who got the interview, and who heard nothing

That is how we know which CVs get called.

Get the CV for this job

From $25 per CV, paid once. No subscription.

The numbers game

More applications. More interviews.

Every application goes out with its own CV, written for that posting and paid once. Send enough of them and the law of large numbers finds you the job.

Get the CV for this job
By hand5–10
With CV Rocket100
applications a day

Nearby

Live postings like this one

Same employer first, then the same role elsewhere.

Before you press

Straight answers

Get the CV for this job

From $25 per CV, paid once. No subscription.

What if my background isn't good enough?

We make the most of the background you have. The CV uses every piece of relevant proof your profile holds, and one of the 25 readers reads your whole profile and flags what the CV left out.

Do you really apply for me?

Yes, on the employer's own form, the hardest ones included. Where a question needs you, you answer it right there and AI suggests the best answer. Don't want us applying from our IP addresses? Use our Chrome extension: we apply straight from your own browser.

Is it a subscription?

No. You pay once per CV, from $25. Every application goes out with its own CV, written for that posting.

One job. One CV.
Paid once.

Pick the posting you want. We write for it, apply for you and catch the reply.

Get the CV for this job

From $25 per CV, paid once. No subscription.