Senior C# Developer

Phoenix Medical Supplies; Noordwes; On-site; ZAR 300 000 - 400 000; Full time

Job summary

A leading healthcare distribution company is looking for a Senior C# Engineer to enhance and evolve its internal middleware applications. The role requires extensive experience in C# and .NET technologies to lead the design and development of APIs. Key responsibilities include system modernisation, mentoring junior developers, and ensuring high-quality software delivery. The position offers competitive salary and benefits, including annual leave and wellness programs.

Benefits

25 days annual leave

Healthcare cash plan

High street discounts

Employee Assistance Programme

Fully funded training programmes

Qualifications

• Extensive experience as a Senior C# Engineer, with a deep understanding of .NET Framework 4.8+ and .NET Core.
• Strong experience with performance optimisation and SQL Server (2019).
• Excellent communication skills to mentor teams and collaborate across departments.

Responsibilities

• Lead the design, development, and maintenance of APIs and integration components using C#.
• Drive system modernisation and tackle technical debt through better practices.
• Ensure all development aligns with coding standards and best practices.

Skills

C#

.NET Framework

SQL Server

JSON

XML

Test-Driven Development

Cloud migration

Tools

Azure DevOps

IIS

NUnit

Job description

Overview

Job Type: Permanent
Job Sector: Unspecified
Region: North West
Location: Runcorn
Salary Description: Competitive
Posted: 05/12/2025
Recruiter: Phoenix Medical Supplies
Job Ref: kal-PHOENIXMedicalSuppliesLimited-45920-64808-en
Job Views: 1

Job Title: Senior C# Engineer
Location: Runcorn
Salary: Competitive (based on experience)
Working Pattern: Full-time, Permanent

About Us: PHOENIX Medical Supplies is a leading provider of healthcare and pharmaceutical distribution services across the UK. Our Digital Technology department is at the heart of our innovation, driving the development and modernisation of key systems that support our customers and business operations. We’re now seeking a Senior C# Engineer to play a pivotal role in maintaining, enhancing, and evolving our internal middleware applications — the Phoenix Data Integrator and IM1g — which connect our core systems and support services such as Hey Pharmacist. This is a key position for an experienced engineer looking to shape the technical direction of critical digital infrastructure.

Responsibilities

• Lead the design, development, and maintenance of APIs and integration components using C# and related technologies.
• Drive system modernisation and tackle technical debt through refactoring and continuous improvement.
• Ensure all development aligns with best practices, coding standards, and SOLID design principles.
• Collaborate with project stakeholders, QA, and DevOps teams to deliver high-quality, secure, and scalable solutions.
• Identify and resolve performance bottlenecks, build issues, and deployment challenges.
• Lead code reviews, mentor junior developers, and promote team-wide technical excellence.
• Support automated testing and CI/CD pipeline improvements.
• Contribute to ongoing improvements in processes, tooling, and development practices.

Qualifications

• Extensive experience as a Senior C# Engineer, with deep understanding of .NET Framework 4.8+ and .NET Core.
• Strong experience with JSON, XML, XSD, and XSLT.
• Proficiency with SQL Server (2019) and strong understanding of performance optimisation.
• Skilled in unit testing and Test-Driven Development (TDD) using tools such as NUnit.
• Proven experience deploying applications to IIS and troubleshooting complex build or release issues.
• Excellent communication skills with the ability to collaborate across teams and mentor others.
• Desirable: Experience with WCF, ServiceStack, or Developer Express.
• Experience working with Azure DevOps, CI/CD pipelines, or Azure App Service.
• Knowledge of legacy system maintenance and modernisation.
• Familiarity with AWS and cloud migration projects.

What We Offer

• 25 days (pro rata) annual leave plus bank holidays, increasing with length of service
• Medicash – a health cash plan to support everyday healthcare costs (e.g. eyecare, prescriptions)
• iTrent Financial Wellbeing – an app to help manage and access your pay flexibly
• High street discounts and offers
• Employee Assistance Programme (EAP)
• Contributory Pension Scheme
• Fully funded accredited training programmes through the Apprenticeship Scheme
• INDPMS