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Senior Backend Developer

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Onsite

Senior Backend Developer

Rullion

Senior Backend Developer

Skills

PythonGitGraphQLAWS

1 month ago

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Important information


Contract type:

Freelance / Contract

Location:

London, UK

Work mode:

Onsite

Published on:

22 September 2026

What they need


Senior Backend Developer

Full-time

Inside IR35

Hybrid 1 office day

London Farringdon office address: 47-53 Charterhouse St, London, EC1M 6PB

Join a dynamic energy provider dedicated to sustainable solutions in the UK. We seek enthusiastic and resourceful Backend Python Engineers at senior levels who are passionate about crafting exceptional products.

Initially it will be a six-month contract but there is potential for it to be extended. The role is Hybrid, with one day a week being based in their London. It is a full-time role, 37 hours per week. If this role feels right, send us your CV.

Accountabilities:

  • Playing a pivotal role in the backend engineering team, you will help to build full-stack cloud apps.
  • You’ll be using Python and AWS Cloud services on the backend.
  • Adopt a Server-less first approach to application design, collaborating within an agile team alongside other backend engineers and product designers.
  • Strategize, develop, test, and deploy new features and experiments.
  • Engage in collaborative coding practices such as pair programming and code reviews within the team.
  • Contribute to resolving the complexities inherent in large-scale systems and extensive datasets.
  • Foster close collaboration with our Product, Data, Front-end, Platform, and Security teams.

Knowledge and Skills:

  • Demonstrated expertise as a Senior Backend Developer.
  • Proficiency in Python as your primary language, or willingness to adapt.
  • Hands-on experience with RESTful APIs and/or GraphQL.
  • Proficiency in version control tools like Git.
  • Sound understanding of development best practices including pair programming and TDD.
  • Eagerness to engage with emerging technologies and collaborate with the team in designing solutions from inception, facilitated by effective communication skills that promote teamwork.
  • Strong abilities in software design, problem-solving, and debugging.
  • Enthusiasm for continuous code improvement and learning from peers.

Please note:

Should your application be successful, and you are offered the role, a number of pre-employment checks need to be carried out before your appointment can be confirmed. Any assignment offer with our client will be subject to a satisfactory checking report from the Disclosure Barring Service.

This vacancy is being advertised by Rullion Ltd acting as an employment business.

Since 1978, Rullion has been securing exceptional candidates for a range of clients; from large well-known brands, to SMEs and start-ups. As a family-owned business, Rullion’s approach is credible and honest, focused on building long-lasting relationships with both clients and candidates.

We celebrate and support diversity and are committed to ensuring equal opportunities for both employees and applicants.

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