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Web Portal & API Developer /Software Developer This opportunity is brand new, due to business growth and with a globally recognised leader in their sector. Based in Leyland this role will see you develop your career within quite a unique sector. Role Competencies • Excellent debugging and analytical problem-solving skills, • Ability to understand complex, multi-service interaction flows, • Secure coding mindset and API-first approach, • Strong team collaboration and clear technical communication, • C# (Strong proficiency), • ASP.NET MVC or .NET Core Web API, • MVC concepts: Routing, Controllers, Filters, Middleware, Model Binding, DI, • Entity Framework Core:, • DbContext, DbSet, OnModelCreating, LINQ, • ADO.NET / Raw SQL execution experience (e.g., SqlCommand, Stored Procedures), • MS SQL Server, MySQL database experience, • HTML5, CSS3, JavaScript, • API & Integration:, • REST API expertise (HTTP verbs, status codes, response handling), • Experience consuming APIs using HttpClient, RestSharp or equivalent, • JSON serialization/deserialization (System.Text.Json / Newtonsoft.Json), • CORS, HTTPS, API Security best practices, • Version Control & Deployment, • Git (Branching, Pull Requests, Conflict Resolution), • CI/CD experience (Azure DevOps, GitLab CI) (preferred), • Hosting experience with IIS or Kestrel, • Docker basics (preferred but not mandatory)Preferred Skills, • Fintech or payment API integration experience, • Cloud hosting basics (Azure, AWS), • Experience with Webhooks or event-driven APIs, • Familiarity with structured logging (Splunk, ELK, Application Insights), • API performance optimisation & rate-limiting handlingKey Responsibilities, • Develop and maintain web portals using ASP.NET MVC / .NET Core, • Design, build, and integrate REST APIs with internal and third-party systems, • Implement secure authentication mechanisms (JWT, OAuth2, API Keys), • Integrate applications with relational databases using EF Core (DbContext, LINQ, Migrations), • Debug end-to-end request flows(UI ? Controller ? API ? Database ? Response), • Maintain and publish API documentation using Swagger/OpenAPI, • Ensure API security, reliability, and performance including:, • Proper error handling, • Retry logic, • Logging, • Timeouts, • CORS configuration, • Collaborate with database, infrastructure, and QA teams throughout release cycles, • Participate in code reviews and follow Git best practices, • Contribute to CI/CD workflows and deployment processesEducation & Experience, • Bachelor's degree in Computer Science, Software Engineering, or related field By applying for this role your details will be submitted to Adecco. Our Candidate Privacy Information Statement explaining how we will use your information is available on our website.