Senior Developer, JavaScript, ASP.NET MVC

System C

Senior Developer developing software for the NHS, focusing on the CIS Oncology product suite. Responsible for design, development, and support within the ChemoCare product.

Posted 6/9/2026full-timeBelfast • 🇬🇧 United KingdomSenior💰 £45,000 - £55,000 per yearWebsite

Tech Stack

Tools & technologies

AndroidASP.NETJavaScript.NETReactReact NativeSQL

About the role

Key responsibilities & impact

Designing, developing, and maintaining software within the CIS Oncology (ChemoCare) 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 ChemoCare 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 3rd line support (as part of a shared team responsibility) for the ChemoCare product, including investigation and resolution of complex defects where required

Requirements

What you’ll need

Strong professional experience with C# and ASP.NET MVC
Strong SQL Server experience
Experience in developing with for the web: JavaScript, HTML, CSS
Knowledge of principles of writing mobile apps and deployment on apple and android app stores
Experience using GitHub for source control and collaboration
Strong analytical and problem-solving skills both at a strategic and tactical level
Confidence contributing to technical design and making informed trade-offs
A pragmatic, calm approach when dealing with ambiguity or pressure
Significant commercial experience operating at senior developer level in both back-end and front-end areas
Nice to have: 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.

Benefits

Comp & perks

🌐 Worldwide ❌ Jobs You've Hidden ⭐️ Saved Jobs ✅ Applied Jobs ✉️ Email Alerts 👤 Account System C Website LinkedIn All Job Openings 501 - 1000 employees ⚕️ Healthcare Insurance 📚 Education Healthcare Insurance
Software as a Service (SaaS)
Education System C is a British technology provider specializing in healthcare, social care, and education solutions. It offers a comprehensive range of interoperable technology platforms like CareFlow for healthcare and Liquidlogic for social care and education. System C focuses on delivering integrated solutions that streamline workflows and transform outcomes in health, social care, and educational settings. The company supports digital maturity through products tailored to meet NHS standards and provides best-in-class capabilities across various care domains. With a commitment to community well-being, System C positions itself as both a technology provider and a partner in transformation. Senior Developer, JavaScript, ASP.NET MVC 🔥 1 minute ago 🏢🏡 Belfast – Hybrid 💵 £45k - £55k / year ⏰ Full Time 🟠 Senior 🔙 Backend Engineer 🇬🇧 UK Skilled Worker Visa Sponsor Android ASP.NET JavaScript React React Native SQL .NET Apply Now Find Hiring Managers Customize resume + cover letter Report problem ☆ Save ☑️ Mark as applied ❌ Hide 📋 Description
Designing, developing, and maintaining software within the CIS Oncology (ChemoCare) 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 ChemoCare 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 3rd line support (as part of a shared team responsibility) for the ChemoCare product, including investigation and resolution of complex defects where required 🎯 Requirements
Strong professional experience with C# and ASP.NET MVC
Strong SQL Server experience
Experience in developing with for the web: JavaScript, HTML, CSS
Knowledge of principles of writing mobile apps and deployment on apple and android app stores
Experience using GitHub for source control and collaboration
Strong analytical and problem-solving skills both at a strategic and tactical level
Confidence contributing to technical design and making informed trade-offs
A pragmatic, calm approach when dealing with ambiguity or pressure
Significant commercial experience operating at senior developer level in both back-end and front-end areas
Nice to have: 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. Apply Now 📊 Check your resume score for this job Improve your chances of getting an interview by checking your resume score before you apply. Check Resume Score Similar Jobs Java Developer 🔥 23 hours ago MiFinity 51 - 200 💳 Fintech 💸 Finance 👥 B2C Website LinkedIn All Job Openings Java Developer designing APIs and services for payment processing systems at MiFinity. Collaborating in a hybrid environment to ensure scalability and quality of applications. 🏢🏡 Belfast – Hybrid ⏰ Full Time 🟡 Mid-level 🟠 Senior 🔙 Backend Engineer Docker Java RabbitMQ Spring Spring Boot SpringBoot Senior .Net Developer 🕒 5 days ago Instil 51 - 200 🔒 Cybersecurity 🤖 Artificial Intelligence 🤝 B2B Website LinkedIn All Job Openings Senior .NET Developer designing and building scalable software solutions for Instil. Taking ownership of features and mentoring junior engineers while collaborating with cross-functional teams. 🏢🏡 Belfast – Hybrid ⏰ Full Time 🟠 Senior 🔙 Backend Engineer 🇬🇧 UK Skilled Worker Visa Sponsor Angular AWS Azure Cloud Distributed Systems Docker DynamoDB Google Cloud Platform Kubernetes Microservices MongoDB NoSQL React Vue.js .NET Product Engineer – Java Spring Boot, Full Stack 🕒 April 22 Allstate 10,000+ employees 💸 Finance Website LinkedIn All Job Openings Product Engineer shaping platforms and delivering digital protection products at Allstate's European Digital Centre of Excellence. Focusing on modern engineering practices and user-centered solutions. 🏢🏡 Belfast – Hybrid 💰 Post-IPO Equity on 2014-01 ⏰ Full Time 🟡 Mid-level 🟠 Senior 🔙 Backend Engineer 🇬🇧 UK Skilled Worker Visa Sponsor Angular Docker Java Jenkins Kafka Kubernetes Microservices NoSQL React Spring Spring Boot SpringBoot TypeScript View More Backend Engineer Jobs 🌐 Worldwide Built by Lior Neu-ner. I'd love to hear your feedback — Get in touch via DM or support@remoterocketship.com Search Search Jobs by country Search jobs by city Search jobs by job title Search entry-level jobs Search junior-level jobs Search senior-level jobs Search jobs by tech stack Search jobs by contract type Search remote internships Search remote part-time jobs Remote jobs Anywhere in the World Companies Hiring Anywhere in the World Companies Hiring Sales People Anywhere in the World Companies Hiring Software Engineers Anywhere in the World Resources Advice Tips for finding remote jobs Interview questions and answers Resume examples Cover letter examples Post a job Affiliates Privacy policy Terms of service Job board SEO course AI Apply Copilot OpenClaw job finder Jobs by Country Remote jobs anywhere in the world (Worldwide remote jobs) Remote jobs United States Remote jobs Australia Remote jobs Brazil Remote jobs Canada Remote jobs France Remote jobs Ireland Remote jobs Germany Remote jobs Netherlands Remote jobs Spain Remote jobs UK Popular Jobs Remote data analyst jobs Remote customer support jobs Remote executive assistant jobs Remote marketing jobs Remote product designer jobs Remote product manager jobs Remote project manager jobs Remote recruiter jobs Remote sales jobs Remote software engineer jobs Jobs by Type Remote full-time jobs Remote part-time jobs Remote contract jobs Remote internship jobs Remote entry-level jobs Remote jobs with no experience required Remote junior jobs (1-3 years of experience) Digital nomad jobs Remote jobs with no degree required Freelance remote jobs Temporary remote jobs Remote jobs hiring now Stay at home mom jobs

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Hard Skills & Tools

C#ASP.NET MVCSQL ServerJavaScriptHTMLCSSReact NativeReactNUNIT.NET 10

Soft Skills

analytical skillsproblem-solving skillstechnical designcalm under pressurementoringconstructive feedbackcollaborationrisk managementambiguity handling