C# Senior Software Developer

Preston

1 week ago

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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

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