Application Support Engineer - .NET and React

Job Title: Application Support Engineer – .NET 10 + React Job Location: London, UK (Hybrid) Job Type: FTE Job Description : Position Overview We are seeking a Support Engineer having .NET 10, React and SQL Server skills to join our support team and work closely with agile delivery squads. The role focuses on incident triage and resolution, ServiceNow-based ticket management, and implementing small enhancements using ADO or Jira. Key Responsibilities Provide Level 2 and Level 3 application support. Triage, investigate, and resolve production incidents and service requests within SLA timelines.Manage production incidents, service requests, and problem records in ServiceNow; keep tickets updated and communicate status to stakeholders.Implement small enhancements, bug fixes, and hotfixes in .NET 10 applications as part of agile sprints or ad-hoc requests.Support applications developed using .NET 10, React, jQuery and SQL ServerDiagnose and resolve SQL Server issues: writing queries, investigating performance, and supporting DB deployments.Perform root-cause analysis and prepare permanent fixes or workarounds.Develop minor enhancements, bug fixes, and configuration changes.Support REST-based integrations and troubleshoot API-related issues.Collaborate with development, database, infrastructure, and business teams.Prepare technical documentation, knowledge articles and support procedures.Participate in on-call or shift-based support, if required. Mandatory Skills Hands-on development/support experience with .NET 10 (C#).Front-end experience with React (component-based development, debugging).Proficient with Microsoft SQL Server (T-SQL, performance tuning, stored procedures, troubleshooting).Practical experience with ServiceNow (incident/change/problem management and basic admin/configuration).Strong knowledge of C#, HTML, CSS, JavaScriptExperience troubleshooting web applications in production.Expertise in SQL and relational databases.Experience with debugging tools, application logs, and performance analysis.Good incident-management and communication skills. Secondary Skills Experience with cloud platforms (Azure) and related services.Good understanding of Insurance domain.REST and SOAP web services.IIS administration and deployment troubleshooting.Entity Framework or equivalent ORM technology.Windows services and scheduled jobs.Azure DevOps, TFS, or similar source-control and deployment tools.Familiarity with CI/CD pipelines and deployment processes (Azure DevOps pipelines preferred).Familiarity with monitoring tools such as Splunk, AppDynamics, Dynatrace, or equivalent.Familiarity with Angular, React. Experience and Qualifications 5+ years of experience in .NET 10, React application development or application support.Experience supporting enterprise applications in production.Experience working in ITIL-based support environments.Bachelor’s degree in Computer Science, Information Technology, or a related discipline is preferred.