Senior Developer; JavaScript, ASP.NET MVC

What you will do:

• Designing, developing, and maintaining software within the CIS Oncology (Chemo Care) product suite
• Owning complex features or technical areas through design, implementation, and handover into testing and release
• Making technical decisions and escalating risks or trade‑offs where needed.
• Contributing to the technical direction of the Chemo Care product suite, balancing near term delivery with longer term maintainability
• Working closely with the QA team to support effective testing, defect resolution, and overall product quality
• Ensuring code is clear, maintainable, and appropriately tested, in line with agreed development standards
• Reviewing code written by others and providing practical, constructive feedback
• Supporting and mentoring less experienced developers as part of normal team working
• Providing third‑line support (as part of a shared team responsibility) for the Chemo Care product, including investigation and resolution of complex defects where required

• Strong professional experience with C# and ASP.NET MVC
• Strong SQL Server experience
• Experience in developing for the web:
  JavaScript, HTML, CSS
• Knowledge of principles of writing mobile apps and deployment on Apple and Android app stores
• Experience using Git Hub for source control and collaboration
• Strong analytical and problem‑solving skills both at a strategic and tactical level
• Experience working with complex or long‑lived codebases
• Confidence contributing to technical design and making informed trade‑offs
• A pragmatic, calm approach when dealing with ambiguity or pressure
• Clear communication, including explaining technical constraints to non‑technical stakeholders
• Significant commercial experience operating at senior developer level in both back‑end and front‑end areas

• Experience with React Native or React, or equivalent frameworks
• Experience in writing automated unit tests using NUNIT
• Good understanding of waterfall, agile and scrum development methodologies, and their practical application.
• Experience in .NET 10 and other latest technologies including AI integration
• Experience in Type Script

You will work on software that genuinely matters, alongside people who value collaboration, ownership, and integrity. We support flexible working, encourage reflective practice, and value those who are comfortable navigating change while keeping quality and patient safety at the forefront.

Apply today and help us continue to deliver technology that supports better care across the NHS.

At System C, we believe great work happens when flexibility and collaboration come together. All our roles are offered on a hybrid basis, with colleagues spending a minimum of two days each week in the office to connect, create, and grow together. (Excludes field‑based roles).

We prioritise transparency in our job requirements and selection criteria, ensuring they are based solely on the essentials needed for effective job performance. We consciously avoid assumptions that could skew our perception of a candidate’s suitability for hire.

Our recruitment practices are designed to ensure that no applicant is unfairly disadvantaged by procedures or requirements that disproportionately affect protected groups without being essential for the job.

For every position, we develop a detailed job description and person specification. This approach maintains our focus on the true demands of the role and the skills, experience, and qualifications necessary. During interviews, we involve multiple interviewers where possible to further mitigate unintentional bias, thereby promoting a fair and equitable hiring process.