Senior Developer – .NET 8 & SQL Server

Cradlefin Consultants are recruiting for a Senior Developer with deep expertise in .NET 8, SQL Server, REST APIs, API Security, and OAuth. The ideal candidate will be responsible for designing and developing secure, scalable, and high-performance applications while ensuring best practices in architecture, security, and API development. Salary £80,000.00 – £90,000.00 per year.

Job Responsibilities:

Architecture & Design:

• Design and implement scalable and maintainable .NET 8 solutions
• Define architectural best practices for Microservices, Event-Driven Architecture, and Domain-Driven Design (DDD)
• Develop and optimize database solutions using SQL Server, ensuring high performance and scalability
• Establish best practices for REST API design and development

PI Development & Security:

• Design and secure REST APIs using OAuth 2.0, OpenID Connect, and JWT authentication
• Address OWASP Top 10 vulnerabilities in applications and APIs
• Implement API security best practices, including rate limiting, encryption, and authentication mechanisms
• Work with API Gateway solutions to manage authentication, authorization, and traffic control

Cloud & DevOps (Nice to Have – Azure/AWS):

• Experience with cloud platforms such as Azure or AWS (e.g., API Gateway, Identity Management, Serverless Computing)
• Familiarity with CI/CD pipelines for automated deployments
• Basic knowledge of Infrastructure as Code (IaC) (Terraform, Bicep, or CloudFormation)

Performance & Optimization:

• Optimize .NET applications for high performance, scalability, and low latency
• Implement caching strategies using Redis or similar technologies
• Conduct load testing, performance tuning, and query optimization for databases and APIs

Leadership & Collaboration:

• Work closely with cross-functional teams including development, DevOps, and security teams
• Provide technical leadership and mentorship to development teams
• Conduct code reviews and ensure adherence to architectural best practices.

Person Specifications:

• 12+ years of experience in software development and architecture
• Expertise in .NET 8, C#, ASP.NET Core, and Web API development
• Strong experience with SQL Server, query optimization, indexing, and performance tuning
• Hands-on experience with REST API design & development
• Deep understanding of API Security, OWASP guidelines, OAuth 2.0, and OpenID Connect
• Experience with JWT authentication and API Gateway solutions
• Knowledge of Microservices, CQRS, and Event-Driven Architecture.

Desirable Skills (Not Mandatory):

• Experience with Azure or AWS cloud services
• Familiarity with NoSQL databases (MongoDB, CosmosDB)
• Exposure to GraphQL, gRPC, or WebSockets
• Experience with Kafka, RabbitMQ, or Azure Service Bus
• Certifications in Azure, AWS, Security, or .NET.

Soft Skills:

• Strong problem-solving and analytical skills
• Excellent communication and leadership abilities
• Ability to work independently and drive architectural decisions

If you’re ready to take on a challenging and rewarding role where you can truly make a difference, we’d love to hear from you! Apply today and let’s start the conversation.