Job ID:43971 Location:UK : Home Based Position Category:Information Technology Position Type:Employee Regular Role purpose: The Senior .NET Developer is responsible for delivering robust back-end capability for field service operations, enabling auditors to accept work, access job/task information, perform inspections, and generate inspection reports through secure, reliable APIs. This role owns the design and implementation of scalable .NET services that align with LRQA engineering standards, support product delivery goals, and ensure operational resilience in production. Key Responsibilities: Design, build, and maintain high-quality .NET 8+ API services to support audit and inspection workflows. Translate business requirements for field operations into clear technical solutions and backend delivery plans. Implement and evolve API endpoints using vertical-slice architecture and Minimal API patterns. Deliver secure authentication and authorisation controls using JWT bearer authentication and OpenFGA-based access patterns. Build and optimise integrations with PostgreSQL, blob storage, and supporting platform services. Enforce validation, error handling, paging, versioning, and observability standards across all backend features. Collaborate with product, QA, architecture, and operations teams to deliver reliable production outcomes. Contribute to CI/CD quality gates, static analysis, and warning-free builds with strong code review practices. Mentor engineers and provide technical leadership on backend implementation quality, testing, and maintainability. Support incident triage, root-cause analysis, and continuous improvement of API performance and reliability. Technical / Professional Qualifications / Requirements: Technical: Strong commercial experience with C# 12 and .NET 8-10 (ASP.NET Core Minimal APIs) in production environments. Proven expertise designing and delivering RESTful APIs, including versioning, validation, paging, and structured error handling. Hands-on experience with PostgreSQL and Entity Framework Core (including migrations, configuration, and performance tuning). Experience implementing secure authentication and authorisation patterns (JWT bearer, role/permission models, ReBAC/OpenFGA concepts). Solid understanding of cloud-native backend patterns, including Azure services and blob/object storage integration. Practical experience with observability and operational telemetry (OpenTelemetry, tracing, metrics, and health checks). Strong testing capability across unit and integration layers using xUnit, FluentAssertions, Moq, Testcontainers, and API test harnesses. Familiarity with CI/CD pipelines and quality tooling (static analysis, warning-as-error builds, code quality gates). Comfortable working with containerised local/dev workflows (Docker, docker-compose). Experience with event driven architecture would be advantageous Professional Demonstrable track record delivering backend services for complex business domains with high reliability requirements. Strong stakeholder communication, able to explain technical decisions and trade-offs to technical and non-technical audiences. Ability to work effectively in cross-functional agile teams and maintain delivery focus under changing priorities. Excellent problem-solving and ownership mindset, with a focus on measurable outcomes and continuous improvement. Experience mentoring other engineers through pairing, code reviews, and technical guidance. Strong quality mindset with consistent attention to secure coding, maintainability, and operational excellence. Proven ability to contribute to architecture discussions and influence backend engineering standards. #LI-REMOTE Pre-Employment Checks If you are successful in securing a role with us, we will carry out preemployment checks in accordance with what is permitted under local law. These checks may include, where legally allowed: right to work, identification, verification of employment history, education, and criminal record checks. We will engage our thirdparty background screening provider, Cfirst to conduct these checks on our behalf. Cfirst performs all processing in full compliance with applicable data protection laws and adheres to strict legal, regulatory, and ethical obligations in handling personal data. Any personal information collected for the purpose of these checks will be used solely for evaluating your suitability for employment and will be retained only for as long as necessary to fulfil these purposes and meet legal requirements. Your data will be stored securely and managed in accordance with all relevant privacy legislation. If you have any questions or concerns about the preemployment checks please contact us at [email protected] If you have any questions or concerns on how your data will be handled, please contact us as [email protected] Diversity and Inclusion at LRQA: We are on a mission to be the place where we all want to work and we are passionate about embracing different perspectives because we understand the value this brings to our business, our clients and each other. We are all about creating a safer and more sustainable future and our inclusive culture is right at the heart of our business. Together our employees make our communities better and we want you to be part of our diverse team! LRQA is a leading global assurance provider. The integrity and expertise we bring to our partnership with clients support their journey to a safer, more secure and more sustainable future. (Group entities). 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