Senior Systems Developer - ICT in Bury St Edmunds, Suffolk

Job Location: Woolpit

Salary: Competitive

Contract type: Permanent

Posting End Date: 12/05/2026

At BUUK Infrastructure, our vision is to be the leading utility partner to accelerate the UK towards net zero for all our customers. Our group of companies has been the major drive for change and innovation over 30 years. We provide a supportive environment that is committed to enabling our people to be the best – ensuring they feel proud to be themselves and part of BUUK Infrastructure.

We are looking for a Senior Systems Developer - ICT who would like to help us reach our mission to “earn customer loyalty and drive business growth by providing consistently excellent service”.

Purpose of this role

Provide well-developed full stack software solutions while using your excellent customer service skills to work with users and change/product owners to ensure solutions are as expected and fit for purpose. This position requires you to contribute to and promote the relevant support and development processes associated with the product(s) you work with. As a senior developer, your primary responsibilities will be the design, engineering and support of an established product suite. You will also be involved within a larger sphere of IT, contributing towards the development of departmental policies and standards, whilst acting as a role model for your colleagues.

Your key responsibilities are:

• Designs, codes, verifies, tests, amends and refactors complex programs/scripts and integrations.
• Contributes to selection of and promotes the chosen development methods, tools and techniques for software delivery.
• Ensuring customer effort is minimised through exceptional customer service and customer-focussed solutions.
• Taking specialist knowledge and formally capturing and classifying that knowledge.
• Organising and overseeing knowledge sharing ensuring the effective operation of the team and wider business.
• Maintains release processes and procedures whilst assessing and analysing release components for input to release scheduling.
• Maintains and administers tools and methods for software delivery, deployment and configuration.
• Implementing continual improvement in all aspects of the role.
• Maintaining and following application support processes for the team to ensure the effects of incidents are minimised and requests are served to expectation.
• Proactively contributes specialist expertise and experience to the evolution and implementation of appropriate working practices and culture.
• Any other responsibilities as deemed appropriate by the line manager or hierarchically above.

Qualifications

Degree in IT or equivalent experience.

Experience/Knowledge

• Experience of designing large or complex systems (including .NET /.NET Core–based solutions) whilst evaluating functional and non-functional requirements and ensuring that appropriate methods, tools and techniques are applied.
• Experience of adopting and adapting appropriate software development methods, tools and techniques.
• Experience of contributing to the development of policies, standards, and guidelines for software development (including coding standards and architectural patterns for .NET applications).
• Experience working with release management software (e.g. Azure DevOps or Jenkins) to manage builds and pipelines to achieve continuous integration/delivery.
• Experience with version control systems including branching with multiple developers, reviewing others work (e.g. git).
• Experience of client-side software development such as React, JQuery or JavaScript other frameworks and CSS/Bootstrap integrated with .NET back-end services (e.g. Web APIs).
• Experience of server-side software development (e.g. C#, ASP.NET, .NET Core, Web APIs).
• An understanding of security threats such as the OWASP Top 10 and developing secure applications as a result.
• Project Management Frameworks or Methodologies: Experience of agile, kanban, scrum, or waterfall.
• Experience querying, manipulating structure and data within, improving the performance of and managing of relational SQL databases (including Entity Framework and SQL Server).
• Experience supporting software systems to process, working closely with customers to SLA to deliver excellent customer service.
• Experience supporting the integration of many systems.

Abilities/Skills

• Engages with and contributes to the work of cross-functional teams, facilitating between stakeholders sharing common objectives.
• Demonstrates calm and effective oral and written communication skills when engaging with technical and non-technical audiences.
• Applies, facilitates and develops creative thinking concepts or finds innovative ways to approach a deliverable.
• Encourages learning and growth in the team whilst contributing to working practice.
• Shares knowledge and experience in own specialism to guide team practices and to help others.
• Plans, schedules and monitors work to meet given objectives and processes to time and quality targets.
• Effective in taking proactive ownership of problems to solution.
• Engages and coordinates with subject matter experts to resolve complex issues as they relate to customer / organisational requirements.

Desirable

• ITIL 4 Foundation
• Experience of building and working to system design using UML/C4.
• Experience working in an IT service desk or support environment to an ITSM framework.
• Experience of working with a performance microservice architecture to scale.