Senior application developer Work, Jobs in Northern Ireland (with Salaries)

Senior Developer (C#, React Native)
System C —Belfast
- Full-time
- SQL
- JavaScript
Senior Software Developer
Wilsons Auctions Ltd —Newtownabbey
- £70,000 a year
- Full-time
- AWS
- JavaScript
- APIs
- Employee discount
- Bereavement leave
Quick apply
Senior Manager, ServiceNow Solution Architect, Technology & Transformation
Deloitte —Belfast
- Hybrid work
- Business development
- Agile
- AI
9d
Senior Developer (C#, ASP.NET MVC, JavaScript)
System C —Belfast
- Full-time
- Analysis skills
- JavaScript
- Agile
Senior Software Engineer (Java Or Python) - VP
Citi —Belfast
- Full-time
- Hybrid work
- Mentoring
- AI
- Annual leave
- Employee assistance programme
13d
Solutions Architect, Strategic Applications
Herbert Smith Freehills —Belfast
- Full-time
- Master's degree
- Presentation skills
- SharePoint
Full Stack Application Development Technical Lead (Java/Python), Vice President
Citi —Belfast
- Full-time
- Hybrid work
- Mentoring
- AI
- Communication skills
- Employee assistance programme
- Employee discount
Senior kdb+ Engineer
Data Intellect —Belfast
- Full-time
- Hybrid work
- Azure
- Management
- AWS
- Paid training
- Referral programme
Quick apply
Lead QA Engineer (Bangor / All UK)
Trust Payments —Bangor
- Continuous improvement
- Mentoring
- Agile
Senior Software Engineer, Cloud Platform
Signifyd —Belfast
- Java
- AWS
- Analysis skills
- Annual leave
Group Product Manager, Software Supply Chain Trust
Cloudsmith —Belfast
- Product management
- Travel
- AI
- Annual leave
UI Developer (.NET/React) (AVP)
Citi —Belfast
- Full-time
- Hybrid work
- Bachelor's degree
- JavaScript
- No degree
- Annual leave
- Employee assistance programme
Salesforce Technical Manager, Deloitte Digital
Deloitte —Belfast
- Hybrid work
- Business development
- Bachelor's degree
- Mentoring
Senior Power Platform Developer-D365
Codec —Belfast
- Full-time
- Azure
- Software troubleshooting
- Analysis skills
Quick apply
Sr. Escalation Engineer - Client Services
Thales —Belfast
- Weekend availability
- Computer Science
- Engineering
- Databases
- Annual leave
- Employee discount
5d
AI Architect - UK
Rackspace —Hyde Park
- Full-time
- System design
- Master's degree
- AWS
Lead Software Engineer
TeamFeePay —Belfast
- Full-time
- Hybrid work
- Engineering
- Java
- Business development
- Free parking
- Flexible schedule
Quick apply
Senior Frontend Engineer
Version 1 —Belfast
- Full-time
- Mentoring
- Agile
- Communication skills
- Employee assistance programme
- Employee discount
Quick apply
Senior Framework Architect ( React )
FalconSmartIT —Belfast
- Software troubleshooting
- Analysis skills
- Bachelor's degree
Quick apply
kdb+ Contractor (Capital Markets)
Data Intellect —Belfast
- Hybrid work
- Azure
- Management
- AWS
Quick apply

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Senior Developer (C#, React Native)

System C -
Belfast

Apply Now

Job details

Full-time

Qualifications

ASP.NET
CSS
C#
Microsoft SQL Server
SQL
C
JavaScript
GitHub
React Native

Full job description

Description

At System C, we build technology that supports better outcomes across health and care. We are looking for a Senior Software Developer to join our CIS Oncology product suite, working on ChemoCare, a market leading system that supports the safe and effective management of chemotherapy treatment across the NHS.

This is a senior individual contributor role for an experienced developer who enjoys hands on work and taking ownership of complex technical areas. You will play an important role in ensuring reliable delivery, strong engineering practice, and the ongoing evolution of a product that clinicians depend on every day.

What you will do

Design, develop, and maintain software within the CIS Oncology (ChemoCare) product suite.
Own complex features or technical areas from design through implementation, testing, and release.
Make informed technical decisions, escalating risks or trade offs when appropriate.
Contribute to the technical direction of the product, balancing near term delivery with long term maintainability.
Work closely with QA colleagues to support effective testing, defect resolution, and overall product quality.
Write clear, maintainable, and well tested code in line with agreed development standards.
Review code written by others and provide practical, constructive feedback.
Support and mentor less experienced developers as part of day to day team working.
Provide shared third line support, investigating and resolving complex production issues when required.

What you will bring

Significant commercial experience operating as a senior software developer.
Strong professional experience with C#.
Experience contributing to or supporting a mobile application built with React Native.
Experience with modern web development, including JavaScript and CSS.
A track record of designing and building maintainable software in a team environment.
Experience working with complex or long lived codebases.
Confidence contributing to technical design and making thoughtful trade offs.
Experience reviewing code and supporting quality through good development practices.

Nice to have

Experience building and maintaining ASP.NET MVC applications.
SQL Server experience, including writing and optimising SQL for production systems.
Experience using GitHub for source control and collaboration.

At System C, you will join a collaborative, mission driven team that values ownership, integrity, and continuous improvement. We offer flexible benefits, a strong focus on professional development, and the opportunity to work on technology that genuinely makes a difference.

Apply today and help shape software that supports better care.

Apply Now

Refine Your Search

senior application developer jobs in northern ireland

Senior Developer (C#, React Native)

Senior Software Developer

Senior Manager, ServiceNow Solution Architect, Technology & Transformation

Senior Developer (C#, ASP.NET MVC, JavaScript)

Senior Software Engineer (Java Or Python) - VP

Solutions Architect, Strategic Applications

Full Stack Application Development Technical Lead (Java/Python), Vice President

Senior kdb+ Engineer

Lead QA Engineer (Bangor / All UK)

Senior Software Engineer, Cloud Platform

Group Product Manager, Software Supply Chain Trust

UI Developer (.NET/React) (AVP)

Salesforce Technical Manager, Deloitte Digital

Senior Power Platform Developer-D365

Sr. Escalation Engineer - Client Services

AI Architect - UK

Lead Software Engineer

Senior Frontend Engineer

Senior Framework Architect ( React )

kdb+ Contractor (Capital Markets)

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