Junior Developer

November 4, 2026

Remote

Junior

London, United Kingdom

Indeed

Description

A remote junior developer role building and maintaining software for domestic energy modelling tools. The work covers turning research, calculations and technical specifications into reliable C# and .NET code, improving libraries, services and APIs, and building quality through unit tests and technical documentation. The role includes coaching and code reviews from a Senior Energy Modelling Developer, with a salary of up to £30,500 per annum depending on experience.

Responsibilities

Develop C# and .NET software that turns energy modelling specifications, research and algorithms into clear, efficient code
Maintain and improve libraries, services and APIs, investigating bugs and helping make our software more reliable
Build quality into your work through unit tests, automated testing, code reviews and clear technical documentation
Use Git and Azure DevOps to manage code and contribute to planning, development and release activities
Work with developers, analysts and energy modellers, building your understanding of domestic energy modelling and contributing to improvements
Start with well-scoped tasks and gradually take ownership of larger pieces of work as your skills develop

Requirements

Good working knowledge of C# and Microsoft .NET gained through work, study, personal projects or another demonstrable route, alongside experience with tools such as Visual Studio
Understanding of object-oriented programming, clean code and testing basics, plus experience using Git and familiarity with Azure DevOps or a comparable platform
Strong analytical and problem-solving skills, with confidence working through numerical concepts and logical challenges
Clear communication and organisational skills, including the ability to explain your thinking, manage agreed priorities and recognise when to ask for support
Willingness to learn, seek feedback and develop software engineering and energy modelling knowledge while contributing to an inclusive and professional team
Experience with Python, SQL, Agile development or AI-assisted development tools is desirable but not essential, as is an interest in sustainability or data-driven research

Conditions

Most roles can be done remotely with many people working from home full-time
True flexibility in how and where you work, subject to role requirements
Generous holiday: 25 days plus bank holidays and extra Christmas leave
Strong pension and life assurance
Enhanced family leave
Green travel perks including EV scheme and cycle to work
Professional development support
Yearly wellbeing allowance
Welcoming office spaces in London, Edinburgh, Belfast, Cardiff and Hadleigh for those who want to connect in person