.NET Developer

Onyx-Conseil; City Of London; On-site; GBP 60,000 - 70,000; Full time

Job summary

A growing tech company in London is looking for an experienced .NET Backend Developer for a 3-6 month FTC. You will play a crucial role in developing backend systems, APIs, and cloud infrastructure and collaborate with engineering teams to deliver scalable solutions. The ideal candidate will have strong skills in C#, ASP.NET, SQL Server, and AWS, along with a focus on RESTful APIs and modern backend technologies.

Benefits

Competitive salary

Benefits

Qualifications

• Strong commercial experience in backend-focused .NET development.
• Solid skills in C#, ASP.NET, SQL Server, and AWS cloud environments.
• Experience with RESTful APIs, HTML, CSS, and JavaScript.

Responsibilities

• Collaborate with engineering teams to design and develop backend systems and APIs.
• Develop secure, scalable, and maintainable services using C# and ASP.NET Core.
• Work with SQL Server to optimise queries and performance.
• Support AWS deployments and cloud environment configuration.
• Analyse issues in existing systems and provide robust technical solutions.
• Contribute to continuous improvement of tools and processes.

Skills

C#

ASP.NET

SQL Server

AWS

RESTful APIs

Job description

.NET Backend Developer

London - 3-6 month FTC

£60,000 to £70,000 Pro Rata + Benefits

Excellent opportunity for an experienced .NET Backend Developer to join a rapidly growing business in London, where you will play a key role in shaping the backend systems, API architecture, and cloud infrastructure that support the company's technology roadmap.

They already work across a range of platforms and services and now require a skilled Backend Developer with strong experience in C#, ASP.NET, SQL Server, and AWS in order to support their ongoing growth and technical evolution.

In this role you will collaborate closely with engineering teams and business stakeholders to design and build backend services, APIs, and cloud-hosted systems. You will work with technologies such as C#, ASP.NET Core, RESTful APIs, SQL Server, and AWS services. You will also support deployments, performance tuning, and the improvement of backend architecture and development processes.

The ideal candidate will have strong commercial experience in backend-focused .NET development with solid skills in C#, ASP.NET, SQL Server, and AWS cloud environments. Experience working with RESTful APIs, HTML, CSS, JavaScript for integration, and a desire to keep up with modern backend technologies is essential.

This is an exciting role that provides the opportunity to join a company at the beginning of its next phase of expansion, offering excellent long term progression for the right candidate.

The Role:

• Collaborate with engineering teams to design and develop backend systems and APIs
• Develop secure, scalable, and maintainable services using C# and ASP.NET Core
• Work with SQL Server to optimise queries, stored procedures, and performance
• Support AWS deployments and cloud environment configuration
• Analyse issues in existing systems and provide robust technical solutions
• Contribute to continuous improvement of tools, processes, and codebase standards

The Person:

• Experienced .NET Backend Developer with strong C#, ASP.NET, and SQL Server skills
• Commercial experience with backend focused development
• Proficient in designing and consuming RESTful APIs
• Knowledge of HTML, CSS, and JavaScript for integration and debugging
• Experience working with AWS services
• Strong problem solving skills with good attention to detail and communication abilities