Application Architect (.NET / ASP.NET) (IT)

At CGI, we deliver innovative, high-impact solutions that transform how organisations operate in complex, mission-critical environments. As an Application Architect, you will play a pivotal role in shaping scalable, resilient systems that drive measurable outcomes for our clients. Working at the forefront of modern architecture, you will influence design decisions, guide Agile teams, and ensure the delivery of high-quality applications that support long-term business success. You?ll be empowered to take ownership of technical direction, contribute creative solutions, and collaborate within a supportive environment that values expertise, growth, and continuous improvement. CGI was recognised in the Sunday Times Best Places to Work List 2025 and has been named a UK ?Best Employer? by the Financial Times. We offer a competitive salary, excellent pension, private healthcare, plus a share scheme (3.5% + 3.5% matching) which makes you a CGI Partner not just an employee. We are committed to inclusivity, building a genuinely diverse community of tech talent and inspiring everyone to pursue careers in our sector, including our Armed Forces, and are proud to hold a Gold Award in recognition of our support of the Armed Forces Corporate Covenant. Join us and you?ll be part of an open, friendly community of experts. We?ll train and support you in taking your career wherever you want it to go. Due to the secure nature of the programme, you will need to hold UK Security Clearance or be eligible to go through this clearance. This is a hybrid position but you will need to work at client sites in London at least 3 days a week. Candidate profile: In this role, you will shape and govern application architecture across a complex enterprise environment, ensuring solutions are scalable, secure, and aligned to business objectives. You will evaluate new feature requests, produce high-quality designs, and provide technical leadership to Agile delivery teams, enabling consistent, high-performing outcomes. Working closely with stakeholders, you will translate technical concepts into clear guidance, ensuring alignment across both technical and non-technical audiences. You will also take ownership of improving live services, supporting incident investigations and root cause analysis, while driving continuous improvements to enhance stability, resilience, and performance. You?ll collaborate across teams to reduce operational overhead, optimise systems, and ensure architectural best practices are embedded throughout delivery.

• Lead application architecture across multiple Agile teams
• Deliver scalable solutions across monolithic and microservices environments
• Guide teams with technical direction and design assurance
• Evaluate and define solutions for new application feature requests
• Troubleshoot and resolve complex incidents and performance issues
• Improve system resilience, stability, and efficiency
• Collaborate effectively with technical and non-technical stakeholders

Required qualifications to be successful in this role To succeed in this role, you will bring strong expertise in application and solution architecture within complex environments, alongside a deep understanding of Microsoft-based technologies and modern web architectures. You will be comfortable working across varied systems, supporting Agile delivery, and driving technical excellence through clear communication and collaboration.

• You should have strong experience in Application/Solution Architecture
• Expert proficiency in ASP.NET, .NET, C#, VB.NET, JavaScript
• Proven experience working with web services and distributed systems
• Strong understanding of microservices and monolithic architectures
• Experience with Agile delivery tools (Jira, Confluence)
• Knowledge of IIS, Windows Server, Active Directory, and networking concepts
• Experience in live service support, incident investigation, and root cause analysis
• Desirable: Node.js, GraphQL, Adobe Experience Manager, MySQL, JBOSS, Oracle

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