Applications Engineer

As the Complex Applications Engineer you will provides L2/L3 technical support, maintenance and development for complex, business-critical applications operating in a secure environment. You’ll be responsible for resolving complex technical issues, maintaining application stability and delivering enhancements, defect fixes and technical improvements. You will work across legacy and modern applications, integrations and supporting technologies to ensure reliable, secure and effective service delivery., * Provide L2/L3 technical support for complex applications, resolving escalated incidents and problems.

• Investigate application failures, performance issues and integration faults, undertaking root-cause analysis.
• Develop, test and implement application enhancements, defect fixes and technical improvements.
• Maintain and modify existing application code, scripts, interfaces and configurations.
• Support legacy and modern applications, including bespoke, COTS, web and client-server systems.
• Support application upgrades, patching, migrations and technology refresh activities.
• Undertake code reviews, unit testing, integration testing and defect resolution.
• Support application deployments and releases using established CI/CD processes.
• Diagnose database, middleware, infrastructure and application integration issues.
• Identify opportunities for automation, performance optimisation and technical debt reduction.
• Maintain technical documentation, source code and configuration records.
• Ensure compliance with security policies, secure coding standards and operational controls.

Due to the nature of the work and the customers we support, the successful candidate must be eligible to meet UK Government and contractual personnel security requirements, including the applicable residency requirements for the role, and have the right to work in the United Kingdom. Some roles may also be subject to nationality requirements where these are necessary to meet UK Government or contractual security obligations., * Experience with programming or scripting languages such as Java, Python, C#/.NET, PowerShell or equivalent.

• Knowledge of enterprise and web-based applications, client-server environments, Commercial Off-The-Shelf (COTS) products and legacy systems.
• Understanding of REST/SOAP APIs, JSON, XML, messaging technologies and middleware.
• Experience working with relational databases, such as SQL Server, Oracle or equivalent technologies.
• Familiarity with Windows and Linux operating systems, including virtualised environments.
• Experience using version control systems such as Git, CI/CD pipelines, debugging tools and automated testing frameworks.
• Knowledge of application monitoring, log analysis, performance investigation and troubleshooting, alongside an understanding of ITIL service management processes.
• Understanding of secure development practices, vulnerability remediation, access controls and configuration management.

Experience across a relevant selection of these technologies and disciplines is expected. You are not required to have expertise in every technology listed, but should demonstrate the ability to apply your technical knowledge across different systems and environments.

At DXC Technology, we believe strong connections and community are key to our success. Our work model prioritizes in-person collaboration while offering flexibility to support wellbeing, productivity, individual work styles, and life circumstances. We’re committed to fostering an inclusive environment where everyone can thrive.