Application Architect (.NET & Digital Platforms)

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, you’ll 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, you’ll 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 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 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. You’ll 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.

You’ll 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. You’ll 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 in ASP.NET, .NET, VB.NET, 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 Node.js, 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

#LI-RJ1

Life at CGI is rooted in ownership, teamwork, respect and belonging. Here, you’ll 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. That’s why we call ourselves CGI Partners rather than employees. We benefit from our collective success and actively shape our company’s strategy and direction.

Your work creates value. You’ll 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.

You’ll shape your career by joining a company built to grow and last. You’ll 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 team—one of the largest IT and business consulting services firms in the world.