Role / Job Title: L3 Support Engineer Dot Net

• Work Location: Livingston, United Kingdom
• Role Type: Contracting
• Mode of Working: Office-based

Dot Net support L3 Engineer

• Retail domain

The RoleDot Net Support Engineer L3 Support
Dot Net (C#, VB.Net); JavaScript; Advanced SQL; REST APIs; Code-level debugging; Performance tuning; Incident/Problem/Change Management; Scripting (PowerShell/Shell); Application MonitoringYour Responsibilities

• Provide advanced L3 support for .Net and JavaScript-based applications
• Perform deep-dive analysis and resolve complex incidents within SLA
• Debug code-level issues and collaborate with engineering teams for permanent fixes
• Drive systemic improvements and performance optimization
• Support releases, UAT, and go-lives; maintain change quality and documentation
• Partner with upstream and downstream teams to ensure service continuity

Your ProfileEssential Skills / Knowledge / Experience

• .Net (C#, VB.Net), VB6, and JavaScript / Vue.js proficiency across application lifecycle
• Proficiency with T-SQL and DocumentDB
• Swift and Kotlin knowledge
• Advanced SQL troubleshooting and tuning; data-model fluency for application triage
• REST API integration and debugging
• Scripting (PowerShell/Shell) for automation and health-check/reporting
• Observability / SRE: alert tuning, performance and capacity analysis; tools include Splunk/ELK and Grafana
• ITSM discipline: ServiceNow / Jira; SLA / OLA adherence; clear incident communication and RCA
• Operations: daily/shift health checks, exception queues, dashboards, runbooks, KEDB
• Triage and recovery: application errors, data mismatches, API failures, safe reprocessing
• Change management: UAT, release notes, SOP/runbook updates; regression mindset
• RCA & systemic improvements: resolve repeat failures, drive optimization, and process improvements

Desirable Skills / Knowledge / Experience

• Retail domain background
• Experience with cloud-native .Net applications (Azure / AWS)
• Web services (SOAP / REST) and microservices architecture
• Automation mindset (PowerShell, Python)
• ITIL Foundation certification
• Familiarity with batch schedulers and cloud logging / monitoring