Senior net backend Work, Jobs (with Salaries)

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Senior Software Engineer (.NET / Avalonia / ASP.NET Core)

Zenovo
Remote

Quick apply

Job details

Full-time

Qualifications

ASP.NET Core
.NET Core
C#
Git
.NET
Java
xUnit
C++
C
PostgreSQL
REST
Computer networking
APIs
UI
Linux
Data visualisation

Full job description

Role: Senior Software Engineer (.NET / Avalonia / ASP.NET Core)
Outside IR35
Location: Mostly remote for a Somerset based client
Start: Within the next two weeks

Overview Supporting a technology partner, we are looking for an experienced Senior Software Engineer to deliver a defined package of new software development work across a modern cross-platform application suite. The engagement will focus on delivering new functionality across desktop, backend, API, and tooling components, whilst improving maintainability, testability, and platform consistency.

Essential Skills & Experience

Strong commercial C# and .NET development experience
Experience developing ASP.NET Core Web APIs and backend services
Commercial experience developing desktop applications using Avalonia UI (or extensive WPF/XAML experience with the ability to adopt Avalonia)
Strong understanding of MVVM architecture
Experience with PostgreSQL, Dapper, and database-driven applications
Experience working with JSON serialization, REST APIs, and OpenAPI/Swagger
Experience implementing real-time communications using SignalR or similar technologies
Strong unit and integration testing experience using xUnit, Moq, or similar frameworks
Experience developing cross-platform applications for Windows and Linux
Strong understanding of modern software engineering practices, code quality, and CI/CD workflows

Desirable Skills

Experience with data visualisation or plotting libraries
Understanding of networking and communication protocols
Experience modernising or migrating legacy desktop applications
Experience porting applications from Java/Swing, C/C++, or other legacy technology stacks
Experience working across both desktop and backend software projects

Technology Stack

C# / .NET
ASP.NET Core
Avalonia UI
PostgreSQL
Dapper
SignalR
Swagger / OpenAPI
xUnit, Moq & Coverlet
Git & CI/CD Pipelines

Package of Work Context This engagement is structured around defined software development work packages. The successful contractor will be responsible for taking agreed features and enhancements through design, implementation, testing, and delivery across desktop applications, backend services, APIs, and supporting tooling.

Indicative Work Packages

Deliver defined software enhancements across desktop, backend, tooling, and API components
Build new application functionality within an established .NET architecture
Develop and extend ASP.NET Core services and REST APIs
Implement database-driven functionality using PostgreSQL and Dapper
Develop and maintain desktop UI features using Avalonia and MVVM principles
Add or improve automated unit and integration tests for new functionality
Contribute technical input to solution design, implementation, and delivery planning
Produce clean, maintainable code together with supporting documentation and handover information for completed deliverables

Contractor Profile

A hands-on Senior Software Engineer with strong modern .NET experience, capable of taking ownership of defined technical deliverables across desktop, backend, API, and tooling projects. The successful contractor will be comfortable working across both modern and legacy technologies, delivering high-quality, maintainable software with minimal supervision.

Quick apply

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