Senior .NET Developer (AWS & AI Architecture)

About the role

We are building a sophisticated CRM and Asset Management platform from the ground up. As the Senior .NET Developer you will own the backend, design the cloud infrastructure and lead AI integration.

Key responsibilities

• Architect and implement the backend using C# and .NET 6/7/8 with ASP.NET Core Web API.
• Design and maintain a hybrid data strategy using SQL Server (EF Core) and AWS DynamoDB.
• Manage AWS services (EC2, ECS, RDS, S3) and set up CI/CD pipelines (GitHub Actions or CodePipeline).
• Integrate Anthropic Claude API for intelligent automation.
• Implement security using JWT, OAuth 2.0 and ASP.NET Core Identity.
• Produce clean, documented APIs (OpenAPI/Swagger) for front‑end collaboration.

Required profile

• Comfortable working autonomously as the sole backend developer.
• Strong problem‑solving skills to choose between relational and NoSQL solutions.
• Collaborative mindset to work closely with a front‑end specialist.
• Agile attitude, able to influence product roadmap in a fast‑paced environment.

Required skills

• C#
• .NET 6.NET 7.NET 8
• ASP.NET Core Web API
• SQL Server, Entity Framework Core
• AWS DynamoDB, EC2, ECS, RDS, S3
• GitHub Actions, AWS CodePipeline
• Anthropic Claude API (or similar LLM)
• JWT, OAuth 2.0, ASP.NET Core Identity
• OpenAPI / Swagger
• MediatR, CQRS
• AWS SQS, Lambda

What we offer

• Competitive salary £60,000‑£70,000 per year.
• Hybrid working model in Brighton, East Sussex.
• Opportunity to shape the architecture of a brand‑new platform.