Senior Backend Developer

Rullion Managed Services; Farringdon; On-site; GBP 35,000 - 55,000; Full time

Job summary

Rullion Managed Services in London is seeking a Senior Backend Developer to join the team on an initial 6-month contract with potential extension. The role is full-time, 37 hours per week, with one day on site in London (EC1M 6PB).

You will develop backend solutions using Python and AWS, adopting a serverless-first approach and building RESTful APIs and/or GraphQL. Collaboration with Agile teams and designers is essential to deliver scalable cloud applications.

Qualifications

• Demonstrable experience as a Senior Backend Developer.

Responsibilities

• Build cloud-based backend solutions with Python and AWS.
• Adopt a serverless-first approach to design.
• Collaborate in an Agile team with backend engineers and designers.
• Develop, test, and deploy new features; engage in pair programming and code reviews.
• Resolve complexities in large-scale systems and data sets.

Skills

Python

AWS

GraphQL

RESTful APIs

Git

TDD

Serverless

DevOps

Job description

Salary: £35,000 - 55,000 per year

Requirements:

• Demonstrable experience working as a Senior Backend Developer.
• Strong commercial experience with Python as a primary development language.
• Hands-on experience developing RESTful APIs and/or GraphQL.
• Experience with AWS Cloud services.
• Experience with serverless architecture and technologies.
• Strong knowledge of Git and version control.
• Good understanding of software development best practices, including TDD, pair programming and code reviews.
• Strong software design, problem-solving and debugging skills.
• Excellent communication and collaboration skills, with the ability to work effectively across multidisciplinary teams.
• A willingness to engage with emerging technologies and contribute to solution design from inception.
• A passion for continuous improvement and learning from colleagues and peers.

Responsibilities:

• Play a pivotal role within our backend engineering team, helping to build cloud-based applications.
• Develop backend solutions using Python and AWS Cloud services.
• Adopt a serverless-first approach to application design.
• Collaborate within an Agile team alongside other backend engineers and product designers.
• Strategise, develop, test and deploy new features and experiments.Participate in collaborative coding practices, including pair programming and code reviews.
• Contribute to resolving the complexities inherent in large-scale systems and extensive datasets.
• Work closely with Product, Data, Front-end, Platform and Security teams.
• Help drive continuous improvement across development practices and technical solutions.

Technologies:

• AWS
• Backend
• Cloud
• Git
• GraphQL
• Support
• Python
• Security
• Serverless
• TDD
• DevOps

More:

We are a dynamic energy provider dedicated to delivering sustainable solutions across the UK. This is an initial 6-month contract with potential for extension, based in London (EC1M 6PB). The role is full-time, 37 hours per week, with one day per week onsite in London. We are a family-owned business with a credible and honest approach, 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.

last updated 38 week of 2026