Senior Software Developer

Essential criteria

Strong professional experience of developing with C# and .NET, including ASP.NET Core MVC and Web API development.

Experience of designing and building REST APIs, microservices and event-driven solutions.

Strong knowledge of software engineering principles, including design patterns, SOLID principles and clean architecture.

Experience with Docker and containerisation, as well as automated testing using xUnit or similar frameworks.

Experience working with SQL Server and data access technologies.

Good knowledge of CI/CD and Git-based development.

Experience of designing event-driven solutions using Azure Service Bus, Apache Kafka or equivalent messaging technologies.

Experience implementing secure APIs using OAuth 2.0, OpenID Connect, JWT and Microsoft Entra ID.

Experience using AI-assisted development tools such as GitHub Copilot, Microsoft Copilot, Claude Code, Gemini CLI, Cursor or similar, while maintaining engineering quality.

An interest in mentoring other developers and sharing technical knowledge across the team.

Desirable criteria

Experience with some of the following Azure technologies would be useful:

Azure API Management

Azure Service Bus

Azure Event Grid

Azure Container Apps

Azure Functions

Azure Logic Apps

Azure Key Vault

Application Insights and Azure Monitor

Infrastructure as Code using Terraform

Here at Penguin, we believe in the power of authenticity and human creativity. When you apply for a position, we want to encourage you to showcase your unique voice. Throughout our recruitment process, please share your own thoughts, experiences, and skills. This helps us get a true sense of who you are and what you might bring to our team.

We celebrate creativity and diverse perspectives, so please be yourself! While we recognise AI tools can be helpful, we recommend using them thoughtfully to ensure your responses reflect you.

As a Disability Confident Committed organisation, we offer interviews to candidates with a disability who meet the essential criteria for the role, and opt-in on their application form. The essential criteria for this role are listed as part of the ‘What you’ll bring’ section.

There may be times when the volume of applications means we cannot take all eligible candidates to interview. We encourage you to tell us about any reasonable adjustments you may need by emailing PRHCareersUK@penguinrandomhouse.co.uk . Remember, you only need to share what you are comfortable with, for us to support your request.

While our offices across the UK are places to connect, collaborate and celebrate with colleagues, we recognise that flexibility around where you work is just as important.

For this role we expect that you will work from our head office in Embassy Gardens, London a minimum of 2 days per week (Tuesday & Thursday) with additional days for team meetings, townhalls etc as required. There may also be occasional travel to our warehouse site in Frating, Colchester.