Application Architect (.NET )

Position Description:

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. Youll 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 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 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.

Your future duties and responsibilities:

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. Youll collaborate across teams to reduce operational overhead optimise systems and ensure architectural best practices are embedded throughout delivery.
Lead & govern application architecture across multiple Agile teams
Design & deliver scalable solutions across monolithic and microservices environments
Guide & support teams with technical direction and design assurance
Evaluate & define solutions for new application feature requests
Troubleshoot & resolve complex incidents and performance issues
Improve & optimise system resilience stability and efficiency
Collaborate & communicate 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 C# 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: GraphQL Adobe Experience Manager MySQL JBOSS Oracle
Excellent communication skills with the ability to engage diverse stakeholders
Must hold or be eligible for SC clearance
#LI-JW1

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.