C# Senior Software Developer

Adria Solutions
Preston, United Kingdom
Last month
£50,000 – £75,000 pa
Applications closed

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Salary

£50,000 – £75,000 pa

Job Type
Permanent
Work Pattern
Full-time
Work Location
On-site
Seniority
Senior
Education
Degree
Security Clearance
Required
Posted
20 Apr 2026 (Last month)

Benefits

Opportunity to mentor and lead junior developers Supportive, collaborative, and technically driven environment Experience in high-security, mission-critical software projects
C# Senior Software Developer - Onsite

My client is seeking a talented C#Senior Software 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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