Application Architect (.NET & Digital Platforms)

Position Description:

At CGI we help clients modernise and enhance critical digital services that support millions of users and deliver meaningful outcomes. As an Application Architect youll play a key role in shaping the future of complex enterprise applications influencing architectural decisions and driving technology improvements that increase stability performance and scalability. Working across Agile delivery teams operational support functions and senior stakeholders youll help translate business needs into robust technical solutions while guiding the evolution of both existing and emerging platforms. Joining CGI means becoming part of a collaborative environment where your expertise is valued your ideas help shape strategic direction and your contributions have a lasting impact on mission-critical services.
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 youll be part of an open friendly community of experts. Well 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 currently hold UK Security Clearance and be willing to undergo additional clearance as part of onboarding. This is a hybrid position.

Your future duties and responsibilities:

In this role you will provide architectural leadership across a portfolio of business-critical applications supporting both ongoing service delivery and future technology evolution. Youll work closely with product teams developers infrastructure specialists and stakeholders to assess new requirements produce application designs and ensure solutions align with architectural standards business objectives and operational needs.
Youll provide technical guidance across Agile delivery teams while supporting live services through incident investigation root cause analysis and service improvement initiatives. Your expertise will help improve application resilience performance and maintainability ensuring technology solutions continue to deliver value while supporting long-term modernisation strategies.
Key responsibilities
Define & Govern application architecture across complex enterprise environments
Design & Deliver scalable solutions for new business and customer requirements
Guide & Support Agile development teams through design reviews and technical assurance
Investigate & Resolve complex application incidents and production issues
Improve & Optimise application stability resilience performance and operational efficiency
Collaborate & Influence technical and non-technical stakeholders across the service
Support & Evolve both monolithic and microservices-based application architectures
Review & Assure data architecture technical designs and solution implementations
Contribute & Drive continuous improvement and technology modernisation initiatives

Required qualifications to be successful in this role:

To succeed in this role you should have significant experience in application and solution architecture within complex enterprise environments. Youll combine strong technical expertise with excellent communication skills enabling you to influence stakeholders support Agile teams and drive architectural excellence across both project and live service environments.
Essential qualifications
Proven experience as an Application Architect Solution Architect or senior technical architecture professional
Strong expertise C# JavaScript and web services architecture
Experience designing and supporting both monolithic and microservices-based applications
Strong understanding of Agile delivery practices using Jira and Confluence
Experience providing technical governance design assurance and architecture leadership
Strong troubleshooting incident management and root cause analysis capabilities
Knowledge of Windows Server Active Directory IIS and enterprise networking concepts
Experience communicating complex technical concepts to technical and non-technical audiences
Strong stakeholder management and collaboration skills
Desirable qualifications
Experience with GraphQL Adobe Experience Manager (AEM)
Knowledge of JBOSS MySQL Oracle and data modelling principles
Experience supporting digital platforms within large-scale enterprise or public sector environments
Familiarity with application modernisation and cloud transformation initiatives
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Skills:

• .NET
• Agile Delivery Management
• Atlassian Confluence
• C#
• JavaScript
• Jira
• Solutions Architecture
• Adobe Experience Manager AEM
• IIS
• JBoss
• MySQL

What you can expect from us:

Together as owners lets turn meaningful insights into action.

Life at CGI is rooted in ownership teamwork respect and belonging. Here youll reach your full potential because

You are invited to be an owner from day 1 as we work together to bring our Dream to life. Thats why we call ourselves CGI Partners rather than employees. We benefit from our collective success and actively shape our companys strategy and direction.

Your work creates value. Youll develop innovative solutions and build relationships with teammates and clients while accessing global capabilities to scale your ideas embrace new opportunities and benefit from expansive industry and technology expertise.

Youll shape your career by joining a company built to grow and last. Youll be supported by leaders who care about your health and well-being and provide you with opportunities to deepen your skills and broaden your horizons.

Come join our teamone of the largest IT and business consulting services firms in the world.