Developer

Closing Date: 30 June 2025

Position Ref: DC 1366

Location: Flexible within the UK. Home-based, blended or fully office based (from our offices in Belfast, Cardiff, Edinburgh or London).

Hours: Full-time (see 'Flexible working')

Salary: Between £45,000-£50,000 per annum (depending on experience)

Who we are

Energy Saving Trust is a leading and trusted organisation, dedicated to promoting energy efficiency, low carbon transport and sustainable energy use. We aim to address the climate emergency and deliver the wider benefits of clean energy as we transition to net zero.

At Energy Saving Trust we don’t just offer jobs – we offer careers. For our people, being part of the effort to address the climate emergency makes working for us truly meaningful and rewarding.

Here are some of the benefits we offer:

• 25 days of annual leave plus bank holidays, with additional leave earned through length of service
• Three extra days off over the Christmas period as a gesture of goodwill
• A competitive pension scheme with generous employer contributions
• Flexibility in our ways of working – work from home, in the office, or a mix of both, depending on your role
• Two paid volunteering days per year – a chance to give back to the causes that matter most to you

Please see our careers page for the full list of benefits we have to offer and why Energy Saving Trust is a great place to work.

The team

The Engineering team sits within our Marketing, Digital and Technology Centre of Excellence, playing a crucial role within Energy Saving Trust by developing and maintaining software solutions that support the delivery of energy efficiency programmes and initiatives. Sitting within the Technical Specialist category, the team collaborates closely with clients and internal stakeholders to implement reliable, scalable digital solutions that align with our mission of addressing the climate emergency.

We are a collaborative and supportive team that values innovation, quality, and continuous learning. We embrace Agile practices and regularly participate in code reviews, stand-ups, and planning sessions to ensure transparency, team alignment, and shared ownership of deliverables.

Working in Engineering at Energy Saving Trust means being part of something bigger, contributing directly to solutions that have a real-world environmental impact, while learning and growing alongside supportive, skilled colleagues.

The role

• As a Software Developer in the Engineering team, you’ll work across the full software lifecycle—from solution design through to delivery, testing, and deployment. This permanent role offers an exciting opportunity to contribute to impactful projects that directly support Energy Saving Trust’s mission of helping people save energy and reduce carbon emissions.
• You’ll engage in solution architecture, technical decision-making, and hands-on coding while also supporting junior developers and maintaining close communication with project stakeholders.
• Your work will support national programmes and contribute to building platforms that help households, businesses, and communities transition to more sustainable energy practices. Success in this role means taking ownership of your code, contributing meaningfully to team practices, and helping deliver high-quality solutions that are robust, scalable, and aligned with strategic goals.

What you’ll do

• Contribute to the design, architecture, and technical direction of software solutions, ensuring they are scalable and fit for purpose.
• Deliver clean, maintainable code while taking ownership of tasks and collaborating with cross-functional teams.
• Participate in code reviews and agile ceremonies to maintain high development standards and continuous improvement.
• Coach and mentor junior developers to support their growth and help embed good engineering practices.
• Improve system performance and stability, and contribute to technical strategy for future platform enhancements.

What you’ll bring

• Strong technical background with demonstrable experience developing with Microsoft platform tools including Visual Studio, C#, .Net 4.8, .Net 6+, ASP.NET MVC, Web API, and SQL Server.
• Proven expertise in solution design and architecture, with the ability to make pragmatic technology choices and deliver scalable, maintainable systems.
• Excellent communication and stakeholder engagement skills, including the ability to translate complex technical concepts for non-technical audiences.
• A proactive, self-motivated approach with the ability to manage your own workload, contribute to team success, and mentor junior developers.
• Solid understanding of cloud platforms (Microsoft Azure), Agile methodologies, and secure development practices such as ISO 27001.

For more information, please see job description.

Applications close 23.59, 30 June 2025. Interviews are intended to be held week commencing 7 July 2025.

To avoid disappointment, you are advised to submit your application as soon as possible as we reserve the right to close the vacancy early if a high volume of applications are received. This is to ensure that we can manage application levels whilst maintaining a positive candidate experience. Unfortunately, once a vacancy has closed, we are unable to consider further applications.

Please click 'apply online' via our recruitment portal. We will ask for your personal details, work history and a supporting statement. Applications submitted without a supporting statement will not be considered.

In your supporting statement please explain how you meet the essential areas in the job description. Applications submitted via email or without a supporting statement will not be considered.

Reasonable adjustments: We are a Disability Confident Committed employer. We want to ensure that our recruitment process is inclusive of and accessible for, everyone.

If you think you may need additional support or reasonable adjustments made to any part of the recruitment process, please get in touch with recruitment@est.org.uk or call reception on +44 (0)20 7222 0101. We will do our very best to support you.

Flexible working: We offer a range of flexible working arrangements, including working from home, compressed or part-time hours, job shares and other arrangements. There is no need to justify your preferred working pattern and we encourage our people to work in whichever way helps them to perform at their best.

We will be happy to discuss this and our blended working model at the interview stage with you.

Please note, that we are unable to provide visa sponsorship for this post. To apply for this post, you must be able to demonstrate your eligibility to work in the UK.

Diversity and inclusion

Energy Saving Trust is committed to creating a diverse, inclusive and equitable workplace where everyone can be themselves, with support to be their best.

We strongly encourage applicants from a wide range of backgrounds and with different identities and experiences to apply for roles with Energy Saving Trust.

We are a Disability Confident Committed employer and we ringfence a minimum number of interview slots for candidates who apply via the Disability Confident scheme and meet the minimum criteria for a role. Find out more here.

You can find out more about our commitment to diversity and inclusion here.