Senior Software Engineer - .NET

Salary: £65,000 - 105,000 per year

Requirements:

• Strong expertise in .NET Core/.NET Framework and C#, including object-oriented design and common design patterns
• Proven experience across the full software development lifecycle, ideally supporting a live, business-critical production system
• Solid experience with SQL Server/T-SQL, including writing and optimizing queries and stored procedures against production data
• Experience designing and consuming RESTful APIs and working with service-oriented or microservice architectures
• Practical experience with unit and integration testing frameworks such as xUnit, NUnit, or MSTest
• Experience with version control and CI/CD tooling such as Git, Jenkins, or equivalent
• Direct experience working in a Scrum or other Agile team, including sprint planning, stand-ups, and retrospectives
• Hands-on, everyday experience using AI-assisted development tools such as GitHub Copilot, Cursor, Claude, or ChatGPT for code generation, refactoring, test writing, debugging, and documentation
• Beneficial, but not mandatory: exposure to AWS services such as DynamoDB, S3, or EC2, or a strong interest in developing cloud skills
• Beneficial, but not mandatory: experience with Infrastructure as Code, such as Terraform or CloudFormation
• Beneficial, but not mandatory: knowledge of containerization, such as Docker or Kubernetes
• Beneficial, but not mandatory: experience in financial services, lending, credit decisioning, or a similarly regulated domain
• Beneficial, but not mandatory: exposure to front-end technologies such as React or modern JavaScript/TypeScript
• Beneficial, but not mandatory: experience with configuration-driven or rules-engine-based systems

Responsibilities:

• Own features end-to-end across the full software development lifecycle, including requirements analysis, technical design, development, unit and integration testing, code review, deployment, and post-release support
• Design, develop, and maintain scalable, maintainable C#/.NET services and components within a complex, multi-client system, ensuring changes are safe across client configurations
• Translate high-level and client-specific requirements into robust technical designs in collaboration with the Technical Lead, Architects, Business Analysts, and Product Owners
• Maintain and improve automated unit, integration, and regression test coverage to support safe, frequent releases into a live multi-client platform
• Contribute to and help evolve CI/CD pipelines using Git, Jenkins, or equivalent tools
• Identify and help remediate technical debt, and contribute to ongoing platform modernization, including migration toward cloud-native AWS architecture
• Mentor Intermediate and Junior developers, share technical knowledge, and support their growth, including effective use of AI-assisted development tools

Technologies:

• .NET Framework
• AI
• AWS
• C#
• ChatGPT
• CI/CD
• Cloud
• Copilot
• Cursor
• Delphi
• Docker
• EC2
• Git
• GitHub
• Support
• JavaScript
• Jenkins
• Kubernetes
• React
• SQL
• Terraform
• TypeScript
• ASP.NET

More:

We are Experian, a global data and technology company powering opportunities for people and businesses around the world. We operate across markets including financial services, healthcare, automotive, agribusiness, and insurance, and invest in people and advanced technologies to unlock the power of data. Our team includes 25,200 people in 32 countries. We are looking for an experienced Senior .NET Developer (C#) to join the Acquisitions & Originations engineering team in our Credit & Verification Services business. The team develops and provides level 3 support for the Delphi Select and Evaluate platforms, complex, configuration-driven, multi-client systems used for lending and origination decisions. Reliability, data integrity, and controlled releases are central to this work. This is a full-time, hybrid role based in Nottingham, with 40% office attendance, reporting to the Lead Developer. We offer a compensation package, discretionary bonus plan, pension, Bupa healthcare, a sharesave scheme, 25 days of annual leave, eight bank holidays, three volunteering days, and the option to purchase additional annual leave. We have a people-first, inclusive, purpose-driven culture and are an equal opportunity and affirmative action employer.

last updated 40 week of 2026