Senior application developer Work, Jobs in Belfast, Ant (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
Cluster Facilitator
Galvia Digital —Belfast
- Temporary
- Hybrid work
- Microsoft Excel
- Microsoft Office
- Project management
- Free parking
- Paid training
Quick apply
Senior Python Developer role
Smart Edge Solutions —Belfast
- £36,667.30 - £112,586.64 a year
- Full-time
- Hybrid work
- SQL
- JavaScript
- Scripting
Quick apply
1d
Lead QA Engineer (Bangor / All UK)
Trust Payments —Bangor
- DevOps
- Java
- Mentoring
Software Development Manager
Plexible Digital Solutions Ltd —Belfast
- £5,000 - £7,200 a month
- Full-time
- Management
- DevOps
- Java
- Flexitime
Quick apply
AI Architect - UK
Rackspace —Hyde Park
- Full-time
- System design
- Master's degree
- AWS
kdb+ Contractor (Capital Markets)
Data Intellect —Belfast
- Hybrid work
- Azure
- Management
- AWS
Quick apply
Field Marketing Manager
Cloudsmith —Belfast
- Sales
- Salesforce
- DevOps
- Annual leave
UI Developer (.NET/React) (AVP)
Citi —Belfast
- Full-time
- Hybrid work
- Bachelor's degree
- JavaScript
- No degree
- Annual leave
- Employee assistance programme
Solutions Architect, Strategic Applications
Herbert Smith Freehills —Belfast
- Full-time
- Azure
- Master's degree
- Presentation skills
10d
Senior Consultant, Java Developer, Solutions, Engineering, AI & Data
Deloitte —Belfast
- Hybrid work
- Azure
- Java
- AWS
Senior Power Platform Developer-D365
Codec —Belfast
- Full-time
- Azure
- SQL
- Analysis skills
Quick apply
10d
Senior kdb+ Engineer
Data Intellect —Belfast
- Full-time
- Hybrid work
- Azure
- Management
- AWS
- Paid training
- Referral programme
Quick apply
Senior Software Engineer (Java Or Python) - VP
Citi —Belfast
- Full-time
- Hybrid work
- Azure
- Java
- AWS
- Annual leave
- Employee assistance programme
7d
Group Product Manager, Software Supply Chain Trust
Cloudsmith —Belfast
- Product management
- Travel
- AI
- Annual leave
Software Engineer
TeamFeePay —Belfast
- Full-time
- Hybrid work
- Engineering
- Java
- Business development
- Free parking
- Flexible schedule
Quick apply
Lead Software Engineer
TeamFeePay —Belfast
- Full-time
- Hybrid work
- Engineering
- Java
- Business development
- Free parking
- Flexible schedule
Quick apply
Senior Software Engineer, Cloud Platform
Signifyd —Belfast
- Java
- AWS
- Analysis skills
- Annual leave
Senior Associate - Property Development & Investment
Pinsent Masons —Belfast
- Full-time

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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 belfast, ant

Senior Developer (C#, React Native)

Senior Software Developer

Cluster Facilitator

Senior Python Developer role

Lead QA Engineer (Bangor / All UK)

Software Development Manager

AI Architect - UK

kdb+ Contractor (Capital Markets)

Field Marketing Manager

UI Developer (.NET/React) (AVP)

Solutions Architect, Strategic Applications

Senior Consultant, Java Developer, Solutions, Engineering, AI & Data

Senior Power Platform Developer-D365

Senior kdb+ Engineer

Senior Software Engineer (Java Or Python) - VP

Group Product Manager, Software Supply Chain Trust

Software Engineer

Lead Software Engineer

Senior Software Engineer, Cloud Platform

Senior Associate - Property Development & Investment

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