Mid-Level Software Engineer - C#/.NET

At Storyteq, we help some of the world's biggest brands simplify their marketing operations, streamline creative production and bring campaigns to life faster.
We're looking for a Mid-Level Software Engineer (C#/.NET) to join our MediaCentre team, working on a platform used by major retail brands to manage everything from campaign planning and production through to delivering marketing materials across stores.
This is a great opportunity for someone who enjoys getting stuck into technical challenges, taking ownership of their work and making a real impact. You'll be working on a mix of existing applications and exciting new features, collaborating with engineers, Product Owners and technical specialists to continuously improve the platform.
We're looking for someone with solid C#/.NET experience who's comfortable working independently but also enjoys being part of a collaborative team. You don't need to know everything, but you should be curious, proactive and keen to develop your technical skills.
Key responsibilities

• Develop, maintain and improve applications and services using C#, ASP.NET and .NET technologies.
• Take ownership of delivering features and improvements, from understanding requirements through to development, testing and release.
• Work closely with Product Owners and engineers to clarify requirements, acceptance criteria and technical solutions.
• Build, maintain and integrate REST APIs to support the platform's functionality.
• Work with SQL databases and Entity Framework to implement and optimise data access.
• Write and maintain automated tests to ensure code quality, reliability and performance.
• Use Docker and established CI/CD pipelines to support development, testing and deployment.
• Investigate and troubleshoot application issues, identifying root causes and implementing effective solutions.
• Participate in code reviews, share knowledge and contribute to continuous improvements.
• Collaborate with senior engineers, Solution Architects and Platform Engineers on technical designs and more complex challenges.
• Communicate progress, challenges and potential risks clearly with the wider team.
• Identify opportunities to improve existing applications, development processes and technical documentation.

Requirements

Essential

• Minimum of 3 years' professional software development experience, including hands-on C#/.NET development within a collaborative engineering team.
• Strong practical experience with C# and ASP.NET MVC or Web API, with familiarity across both .NET Framework and modern .NET.
• Experience working with SQL and relational databases, ideally SQL Server, using an ORM such as Entity Framework.
• Hands-on experience building or integrating REST APIs, including validation, authentication and error handling.
• Experience developing or supporting cloud-hosted applications using GCP, Azure or AWS.
• Working knowledge of Docker, including building images, running containers and troubleshooting configuration issues.
• Experience with CI/CD pipelines, Git, pull requests and code reviews within a structured development environment.
• Experience writing and maintaining automated tests to support application quality and reliability.
• Understanding of application security principles, including authorisation, input validation and secure handling of sensitive information.
• Familiarity with SSO and OIDC authentication technologies or comparable identity management solutions.
• Ability to independently deliver features from requirements through to testing and release, while recognising when technical guidance is needed.
• Strong problem-solving and debugging skills, with experience investigating and resolving application issues.
• Clear communication skills, a collaborative approach and a willingness to learn, share knowledge and apply feedback.

Desirable

• Experience with messaging systems, pub/sub technologies or asynchronous processing.
• Understanding of distributed systems concepts, including retries and duplicate-message handling.
• Experience working with gRPC.
• Exposure to Kubernetes or infrastructure as code.
• Familiarity with observability and monitoring tools such as New Relic, Grafana or OpenTelemetry.
• Experience integrating applications with third-party platforms and services.
• Exposure to front-end technologies such as Razor, jQuery, Vue.js or Angular.
• Experience maintaining established applications or working with complex business workflows.
• Experience contributing to technical design discussions and identifying opportunities to improve application performance and scalability.

We Value Diversity 
We champion and welcome diversity in our workforce and ensure all job applicants receive equal and fair treatment, regardless of age, race, gender or gender identity, religion, sexual orientation, disability, or nationality.

We are not only committed to increasing the visibility and recognition of talent from under-represented groups within our organisation but the wider industry too.

At the end of the day, we make sure we take time to look after ourselves, each other, and the planet because we’re always stronger together.

ITG have a number of community groups (ERGs) available to employees which offer a safe space for like-minded colleagues, with shared interests to connect, socialise and check in with each other. These include Black ITGers Together, LGBTQ+ Together, Mens Health Together, Muslims Together, Neurodiversity Together, Working Parents and Carers Together and Women In Tech Together.

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