C# Senior Software Developer

My client is seeking a talented C# Senior Softwar Developer to join their Preston-based team. This role offers an exciting opportunity to lead projects, mentor junior developers, and work on high-impact, secure banking solutions. You will be a key contributor to web portal and API development, ensuring performance, security, and reliability in a dynamic environment.
This role is ideal for developers with strong technical expertise who are looking to grow into leadership or team management responsibilities.


Key Responsibilities

*Develop and maintain web portals using ASP.NET MVC / .NET Core
*Design and integrate REST APIs with internal and third-party services
*Implement secure authentication mechanisms (JWT, OAuth2, API Keys)
*Connect applications to relational databases using Entity Framework Core (DbContext, LINQ, Migrations)
*Debug and trace request flows from UI Controller API Database Response
*Maintain and publish API documentation via Swagger / OpenAPI
*Ensure API security, reliability, and performance (error handling, retry logic, logging, timeouts, CORS)
*Collaborate with database, infrastructure, and QA teams for portal and API releases
*Participate in code reviews, version control, and CI/CD deployment workflows


Required Technical Skills

*C# (strong proficiency)
*ASP.NET MVC or .NET Core Web API
*MVC concepts: Routing, Controllers, Filters, Middleware, Model Binding, Dependency Injection
*Entity Framework Core (DbContext, DbSet, OnModelCreating, LINQ) and ADO.NET/Raw SQL experience
*MS SQL Server or MySQL database experience
*HTML5, CSS3, JavaScript
*REST API expertise and integration (HttpClient, RestSharp, JSON serialization/deserialization, CORS, HTTPS, API security)
*Git version control and CI/CD workflows (Azure DevOps, GitLab CI preferred)
*Hosting experience with IIS or Kestrel
*Docker basics (preferred but not mandatory)


Preferred/Bonus Skills

*Experience with fintech or payments API integration
*Cloud services (Azure, AWS) hosting basics
*Webhooks and event-based APIs
*Structured logging tools (Splunk, ELK, App Insights)
*Performance optimization and API rate-handling


Why Join My Client

*Be part of a pioneering fintech/secure banking technology company
*Opportunity to mentor and lead junior developers
*Work in a supportive, collaborative, and technically driven environment
*Gain experience in high-security, mission-critical software projects


Interested? Please Click Apply Now!

C# Senior Software Developer