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Award-winning UK bank

Architecting a Scalable and Fully Automated Financial Modelling Platform on AWS

Publicis Sapient partnered with an award-winning UK bank to transform a fragmented, manual Enterprise Risk Management (ERM) system into a scalable, secure, and fully automated cloud-native environment. Using Infrastructure as Code, PowerShell, and GitLab CI/CD, the team delivered repeatable, DR-ready deployments on AWS—meeting all enterprise-grade standards and reducing setup time from weeks to hours.

The Imperative for Change

Although the large UK bank had migrated its ERM workloads to AWS, the setup was fragmented, heavily manual, and lacked compliance with critical non-functional requirements such as disaster recovery, security, and scalability. The existing platform was at end of life and was 13 versions behind leading to a huge compliance risk for the bank. The planned upgrade is an enabler for the bank to meet repeatable deployments and enable faster upgrades. Publicis Sapient was brought in to transform the deployment into a fully automated, modular, and enterprise-compliant solution—leveraging Terraform, PowerShell, GitLab CI/CD, and AWS-native services to create a scalable and secure environment aligned with modern DevOps and infrastructure best practices.

The Transformative Solution

Publicis Sapient re-architected the UK bank’s ERM deployment using a modular, Infrastructure as Code approach. We replaced manual scripts with automated Terraform modules and PowerShell executed through AWS SSM. CI/CD pipelines in GitLab were standardized, secrets were secured using AWS Secrets Manager, and non-functional requirements like DR, monitoring, and backups were embedded into the platform. The solution was agile, repeatable, and aligned with enterprise cloud best practices.

“We successfully delivered a highly complex regulatory product deployment on AWS, meeting close to 25 functional and non-functional requirements spanning security, performance, reliability, and compliance. This initiative involved re-platforming a legacy system into a cloud-native architecture, ensuring it adhered to banking-grade standards and enterprise controls. Our work showcased how a strategic, standards-driven cloud adoption can unlock agility without compromising on governance.”

Priyavart Kaushik , Director, Publicis Sapient

The Impact

Publicis Sapient’s solution transformed the UK bank’s ERM deployment from a fragmented, manually intensive process into a secure, scalable, and automated platform. It enabled the bank to provision environments rapidly, enforce consistent governance, and meet NFRs such as disaster recovery and compliance. Manual intervention was reduced by over 90%, time-to-deploy was cut from weeks to hours, and DevOps adoption improved transparency, auditability, and cross-team collaboration.

99%
reduction in manual configuration tasks
100%
full automation using Terraform, PowerShell, and AWS SSM
+ Increase
in transparency and operational resilience
+ Validation
testing coverage and post-deployment validation

By automating the UK bank’s infrastructure and risk platform setup, the project significantly reduced manual effort and operational stress on IT and risk teams. Engineers no longer needed to log into servers to run scripts or perform repetitive configuration tasks. The team shifted focus from maintenance to innovation, improving morale and enabling faster decision-making. It also enhanced security posture, ensuring sensitive data was better protected.

Without this engagement, the UK Bank would have continued to face repeated environment inconsistencies, prolonged provisioning cycles, and ongoing compliance risks. The lack of automation, testing, and DR readiness exposed the business to operational inefficiencies and potential regulatory gaps. Publicis Sapient’s involvement enabled a sustainable, compliant, and future-proof cloud infrastructure that empowered the teams to innovate with confidence.