NET Developer

Harris Computer; Chippenham; Remote; GBP 80,000 - 100,000; Full time

Job summary

A global technology company is seeking a Senior .NET Developer to design, develop, and maintain high-performance Web API backends. The role emphasizes collaboration, technical excellence, and offers remote flexibility. Candidates should have over 5 years of software development experience, including 4 years with C# /.NET, and familiarity with cloud platforms and CI/CD practices. Join a diverse team committed to improving patient outcomes through innovative technology.

Benefits

25 days holiday plus 5 personal days

Lifestyle Reward of £325 per annum

Collaborative office options in multiple locations

Qualifications

• 5+ years of software development experience, 4+ years with C# /.NET.
• Experience with high‑availability architectures.
• Ability to produce and maintain technical documentation.

Responsibilities

• Design and maintain high-performance Web API backend systems.
• Participate in the full software development lifecycle.
• Collaborate with cross‑functional teams for seamless delivery.

Skills

C# /.NET

Web API development

PostgreSQL

SQL Server

Cloud platforms (Microsoft Azure)

Containerisation (Docker, Kubernetes)

CI/CD (TeamCity, Azure DevOps)

Agile / Scrum

Job description

Responsibilities

• Design, develop, and maintain high-performance Web API backend systems using the latest .NET (8+) and C#, with occasional frontend development.


• Participate in the full software development lifecycle, from requirements gathering and design through to deployment and maintenance.


• Develop and consume RESTful APIs that adhere to OpenAPI specifications and integrate with third‑party services as required.


• Collaborate with cross‑functional teams (QA, Platforms, Product) to ensure seamless delivery.


• Conduct code reviews, provide mentorship, and enforce best practices in software development.


• Optimise performance and scalability of existing systems.


• Ensure adherence to security, compliance, and coding standards.


• Troubleshoot, debug, and resolve complex technical issues in production and development environments.


• Contribute to architectural decisions and help shape technical direction.

Qualifications

• 5+ years of commercial experience in software development, with at least 4 years of hands‑on C# /.NET experience in production environments.


• Proven experience with Web API development; experience with desktop application development (ASP.NET, Entity Framework, Web API, WinForms, WPF) is an advantage.


• Solid experience with PostgreSQL and/or SQL Server, including a strong understanding of database design principles.


• Demonstrated ability to produce and maintain high‑quality technical documentation.


• Experience designing and implementing high‑availability architectures.


• Hands‑on experience with cloud platforms (preferably Microsoft Azure or equivalent).


• Familiarity with CI / CD pipelines (TeamCity, Azure DevOps, or GitHub Actions), automated testing, and infrastructure‑as‑code concepts.


• Proficiency with containerisation and orchestration, including Docker and Kubernetes deployments (Helm, Terraform).


• Exposure to security best practices within regulated environments, including OWASP fundamentals, authentication and authorisation standards (OAuth2, OpenID Connect), secrets management, TLS / mTLS, and certificates.


• Proven ability to lead solution designs and guide engineering efforts across multiple integrations concurrently.


• Demonstrated experience working within Agile / Scrum development environments.


• Experience mentoring junior developers or leading small teams is considered an asset.

Company Overview

At Harris Health Alliance, part of Harris Computer Group, we build mission‑critical software that supports healthcare organisations worldwide. Innovation, reliability, and engineering quality define our approach to improving patient outcomes through technology. As a Senior .NET Developer you will play a pivotal role in designing, developing, and maintaining secure and scalable Web API backends, as well as integration solutions built on the latest .NET technologies.

This permanent role offers full remote flexibility, with the option to work from our collaborative offices in Chippenham, Swindon, Chester, or Plymouth. Join a forward‑thinking, inclusive, and innovative engineering team that values technical excellence, collaboration, and real‑world impact.

Benefits

Harris offers an extremely competitive UK employee benefits programme: 5 personal days leave entitlement over and above the standard 25 days holiday and bank holidays, an annual Lifestyle Reward amounting £325 per annum (pro‑rata). Company details: Harris Health Alliance was formed in 2024 as a subsidiary of Harris Computer, part of the Constellation Software Inc. (TSX: CSU) portfolio. We provide a respectful and united environment, empowering a globally diverse community with equitable opportunities.