Senior .NET Developer

Senior .NET Developer page is loaded## Senior .NET Developer locations:
Office - Plymouth:
Office - Chippenham:
London, United Kingdom time type:
Full time posted on:
Posted Yesterday job requisition :
R0032651

At
** Harris Health Alliance**, part of the 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. Your work will focus on delivering reliable healthcare integrations, implementing industry best practices for API security, and ensuring high performance across distributed systems. In addition to hands-on development, you will contribute to architectural decision-making, lead technical design initiatives, and mentor team members to uphold engineering excellence and deliver high-quality software solutions.

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.
** What you will do
** Your key responsibilities will include (but will not be limited to):
* 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.
** What we are looking for
*** 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, while experience with desktop application development would be an advantage (ASP.NET, Entity Framework, Web API, Win Forms, WPF).
* Solid experience with Postgre

SQL 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 (Team City, Azure Dev Ops, or Git Hub 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.

Formed in 2024 Harris Health Alliance, a subsidiary of Harris Computer comprises four distinct brands all operating within the Healthcare sector providing software to clients worldwide.

Harris Health Alliance is part of Harris Computer group, a provider of mission critical software solutions for the Public Sector, Healthcare,…