Senior Backend Engineer

Octopus Energy Group; Greater London; On-site; GBP 90,000 - 120,000; Full time

Benefits offered by this job

Flexible salary negotiations

Unique company culture

Recognition among top workplaces in 2022

Job summary

A leading energy supplier in Greater London is seeking a Senior Backend Engineer to join their team. This role requires extensive experience in backend development, particularly with Python and Django. The selected candidate will manage the full lifecycle of innovative projects that drive customer benefits in the energy transition. You will work within a dynamic team focused on developing green energy products and ensuring exceptional service. Join a vibrant culture recognized as one of the best places to work in the UK.

Qualifications

• 5+ years of professional experience in backend web application development.
• Hands-on experience with Python/Django or equivalent web frameworks.
• Experience with secure, reliable, large-scale systems.

Responsibilities

• Responsible for end-to-end ownership of innovation trials.
• Deliver market leading green products and outstanding customer service.
• Design and operate scalable, secure backend systems in the cloud.
• Mentor junior developers and share knowledge across teams.

Skills

Backend web application development

Python/Django

Systems design

RDBMS

Cloud environments (AWS, GCP, or Azure)

Team collaboration

Problem-solving

Interest in environmental issues

Team collaboration

Domain modelling

Celery

Terraform

Kubernetes

Tools

PostgreSQL

REST APIs

GraphQL

Celery

Async processing

Job description

Octopus Energy started with a bold idea: to build Britain’s first truly digital energy supplier.

By combining world-class tech with brilliant humans who care deeply about customers and driving the renewable energy transition, we made it happen and earlier this year, we became Britain’s largest energy supplier.

Now, we’re scaling fast and building the next generation of products to accelerate the green energy transition. From making it effortless to switch to heat pumps, solar and EVs, to launching smart tariffs and creating renewable generation at scale, we’re solving some of the most complex challenges in energy with speed, creativity and customer obsession. We’re also enabling our global businesses to reach the full capability of what we’ve achieved in the UK, taking the learnings, products and experiences that customers love here and rolling them out worldwide.

At Octopus Tech, you’ll have real ownership, variety, and the chance to shape products that make a tangible difference in people’s lives – lowering bills, enabling greener living, and delivering experiences customers genuinely love. You’ll work side by side with teams across marketing, operations, and data, and see the impact of your work in the real world, fast.

If this sounds exciting, we’d love to chat.

We are looking for a Senior Backend Engineer to join our Octopus Energy for Business team (OEB).

OEB are the business energy champions. Success for OEB comes down to our ability to look after our customers, whilst furthering the transition to Net Zero. To achieve this we must deliver market leading green products, outstanding customer service and competitive pricing. Businesses have a fundamental role to play in grid decarbonisation, which OEB can support them to unlock.

Powering over 110,000 customers with green electricity, OEB is rapidly scaling. Growth to date is based on disruption and innovation. Testing and rolling out smart products, customer propositions and initiatives. Our most recent phase of growth is looking at mid-market businesses. It’s timeto disrupt and innovate in this space in the same way OEB has for small businesses.

OEB are a small, determined team. Team members have freedom and accountability over their areas. To maintain our advantage, innovation and customer centricity are key. This role will be responsible for the end-to-end ownership of rapidly developing, launching and owning innovation trials that seek to drive tangible benefits to customers.

What you'll need...

• 5+ years of professional experience in backend web application development
• Hands-on experience with Python/Django or equivalent web frameworks
• Strong systems design abilities, including microservices architecture
• Experience designing and operating RDBMS (e.g., PostgreSQL, MySQL)
• Experience with secure, reliable, large-scale/ high-transaction systems
• Experience developing and operating systems in cloud environments (AWS, GCP, or Azure)
• A self-sufficient person with a high level of initiative, able to work autonomously in a fast-changing environment
• A strong team player who collaborates across teams and departments, mentoring and coaching more junior developers
• Someone excited to solve social challenges through technology
• Interest in environmental issues and the energy industry

We're looking for someone with a general interest in technology and problem-solving; someone diligent and thoughtful. It would be helpful to have experience/expertise in the following (in rough priority order):

• Python
• Django (or equiv. web framework)
• Domain modelling
• Designing distributed systems, improving service reliability, and shaping long-term architectural strategy
• HTTP and REST APIs, GraphQL and other API technologies
• Writing robust and fault-tolerant software
• Celery and async processing
• Postgres
• Plus experience in the following would be a bonus: AWS, Terraform, Packer, Consul

💚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 won best company to work for in 2022, on Glassdoor we were voted 50 best places to work in 2022 and 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

We are seeking someone who is happy to work in the London office 2-3 days a week.

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 [e-mail] and we’d love to help!

If this sounds like you then we'd love to hear from you.🚀

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.