L3 Support Engineer

BrickRed Systems; Reading; On-site; GBP 60,000 - 75,000; Full time

Job summary

BrickRed Systems LLC is seeking a highly skilled L3 Support Engineer to provide advanced technical and application support for enterprise systems in Reading. You will resolve complex issues, perform root cause analysis, and collaborate with development and infrastructure teams to maintain stability and performance.

The role focuses on C#/.NET development and production support, with some exposure to Microsoft Azure.

Qualifications

• 6–10 years in application support or production engineering.
• Strong C# and .NET/.NET Core skills.
• Experience debugging complex production issues.
• Familiarity with SQL Server and REST APIs.

Responsibilities

• Provide third-line support for complex issues.
• Perform root cause analysis and document fixes.
• Debug applications developed with C# and .NET.
• Analyse logs, queries, API failures and performance.
• Support deployments, patches, and upgrades.
• Collaborate with development, L1/L2, infrastructure, and architecture teams.
• Maintain technical documentation and knowledge bases.
• Participate in major incident management and problem solving.

Skills

C#/.NET

Debugging

REST APIs

SQL Server

Azure

DevOps

CI/CD

Git

Problem-solving

Application support

Tools

Git

SSMS

Azure DevOps

Job description

We are looking for a highly skilled L3 Support Engineer to provide advanced technical and application support for enterprise applications. The candidate will be responsible for resolving complex technical issues, performing root cause analysis, implementing permanent fixes, and working closely with development and infrastructure teams to maintain application stability and performance.

The ideal candidate will have strong hands-on experience in C#/.NET development, debugging, and production support, along with some exposure to Microsoft Azure.

Key Responsibilities

• Provide third-line technical support for complex application and production issues.
• Investigate critical incidents and perform detailed root cause analysis.
• Debug and troubleshoot applications developed using C# and .NET.
• Identify code-level defects and implement fixes or workarounds.
• Analyse application logs, database queries, API failures, and system performance issues.
• Work closely with development, L1/L2 support, infrastructure, and architecture teams.
• Support production releases, deployments, patches, and application upgrades.
• Identify recurring technical issues and recommend long-term corrective actions.
• Participate in major incident management and technical problem-solving.
• Improve application performance, reliability, and operational stability.
• Maintain technical documentation, troubleshooting procedures, and knowledge repositories.

Required Skills & Experience

• 6–10 years of experience in application support, software development, or production engineering.
• Strong hands-on knowledge of C# and .NET / .NET Core.
• Good understanding of application architecture and debugging techniques.
• Experience troubleshooting complex production issues.
• Strong knowledge of SQL Server, including query analysis and optimisation.
• Experience working with REST APIs and web services.
• Ability to analyse application logs and identify underlying technical issues.
• Basic to working knowledge of Microsoft Azure.
• Familiarity with version control systems such as Git.
• Understanding of CI/CD, release management, and deployment processes.
• Strong analytical, troubleshooting, and problem-solving skills.
• Experience in enterprise application modernisation or enhancement projects.
• Exposure to Azure monitoring and cloud-hosted applications.
• Familiarity with DevOps and automated deployment practices.
• Experience working in regulated environments or UK public sector projects.
• ITIL certification or experience with ITIL-based service management processes.

Security Clearance Requirement

Security clearance is a project-specific requirement and may be required depending on the nature of the client engagement. Candidates may be required to obtain or hold valid UK Security Clearance (SC) for specific projects, subject to client and project requirements.

ABOUT BRICKRED SYSTEMS

BrickRed Systems is a global leader in next-generation technology consulting and workforce solutions, specializing in delivering high-quality talent across digital, engineering, marketing, analytics, finance, operations, and business transformation domains. With a strong emphasis on innovation, scalability, and client success, BrickRed Systems helps organizations solve complex business challenges by providing skilled professionals across strategy, technology, creative, and operational functions. BrickRed fosters a culture of continuous learning, collaboration, and excellence, enabling professionals to contribute to high-impact global initiatives while advancing their careers.