Job Description

Power Platform Developers are responsible for designing, developing, and implementing innovative software solutions (both on-prem and cloud) that meet ISO/ICT’s, and Sellafield Ltd’s, strategic business needs. Roleholders require strong technical expertise, an ability to work effectively in teams, and a commitment to continuous improvement to deliver secure and scalable solutions that help Sellafield Ltd realise its digital ambition.

Principal Accountabilities

• Support the delivery of Power Platform digital products across ISO/ICT and Sellafield Ltd by developing software components and writing clean, secure, and well-tested code, to provide quality solutions.
• Proactively manage service components in line with key performance indicators (KPIs), supporting service availability and capacity management as well as the identification and resolution of service faults.
• Optimise development processes by analysing existing workflows, identifying improvements, and supporting their implementation.
• Design, review, and support the quality assurance of software solutions to ensure they effectively mitigate security threats.
• Apply modern development technique and standards to the delivery of all software solutions and encourage adherence to them among other developers.
• Use a variety of prototyping methods, sharing best practice and supporting other developers in their application, while considering the strategic end-to-end design of services.
• Design systems in line with architectural principles, policies and organisational standards. This may also include supporting their implementation and procurement.
• Support systems integration by defining the integration build, coordinating build activities across systems, and participating in testing.
• Support engagement with the Digital Exploitation team to understand customer needs and translate them into user stories. This includes identifying appropriate tools and methods to prioritise user stories and clearly articulating the distinction between user needs and desires.

Essential Skills

• A degree or equivalent experience in a relevant field, such as Computer Science.
• Proven experience or acumen as a Developer.
• Strong understanding of agile software development methodologies.
• Proficiency in JavaScript, Vue.js, React, HTML, CSS, PowerShell.
• Proficiency in Power Apps.
• Proficient with Test Strategies, Test Frameworks, and Test Automation.
• Excellent problem solving and analytical skills.
• Strong interpersonal skills, demonstrating ability to work in teams and collaborate effectively.

Desirable Skills

• Able to lead and mentor junior developers.
• Experience working in a highly regulated environment.
• Understanding of Sellafield Ltd, including its operations and ICT estate or equivalent.

Additional Information

• Open VN
• Number of Vacancies: 1
• Contact: Susan Routledge

The interviews for this vacancy are expected to be on 16th November 2026.

ASW’s may have the right to apply for internal Sellafield Ltd vacancies. Please note if you are an Agency Supplied Worker you are required to attach evidence of all qualifications obtained to support your application. We require a minimum of A*-C (9-4) GCSE in English Language, Maths & Science/IT or equivalent / higher qualification.

Contracted Supply Workers (CSWs) are not eligible to apply to internal vacancies. CSWs are welcome to apply to external vacancies advertised on our external vacancies board.

If you choose to apply for this role and your application is shortlisted by the hiring manager, you will be invited to a competency based interview. In the interview, you will be assessed against the below competencies:

Behavioural:
1. Commitment to Nuclear Safety & Security
2. Commitment to the Business
3. Holding Self and Others to Account

Technical:
1. Using IT at work
2. Driving & Facilitating Change

Please see link to the competency framework for further information:
https://slportal.ssa-intra.net/pub/SC001/00027/Competency%20Framework/Forms/AllItems.aspx

If your technical competency is not in the above framework, please refer to the profession’s share point page for further information.

Sellafield Ltd are recognised as a Disability Confident Employer (Level 3). Disability Confident employers offer an interview to disabled applicants that meet the minimum criteria for a vacancy. Sellafield Ltd define the minimum criteria as the ‘essential skills’ which are listed on the vacancy notice. Whilst completing your application form, you will be able to indicate if you wish to be considered under the disability confident scheme. If you would prefer to discuss this directly with us, please contact the GBS Recruitment team on recruitment@sellafieldcloud.co.uk

Please ensure that you save a copy of this advert for future reference if you make an application for this role.

The closing date for this vacancy is 26th October 2026.