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A Secure, Compliant FinTech Platform on AWS Built with DevSecOps

A FinTech platform rebuilt on AWS with security in every pipeline stage (SAST, dependency, image and IaC policy scans): 99.99% availability, zero critical incidents, 40% faster deployments and 35% lower infrastructure cost.

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  • DevSecOps
  • FinTech
  • India
  • AWS
SAST + dependency scanImage scanIaC policy checkEKSCodeBuild blockedZero critical incidents99.99% availability35% lower infra cost
Builds pass security gates before EKS; a vulnerable image is stopped at the gate.
critical security incidents after go-live
Zero
platform availability
99.99%
lower cloud infrastructure cost
35%

At a glance

Engagement
DevSecOps
Industry
FinTech
Platform
AWS
Region
India
Client
High-growth FinTech company, name withheld
Technologies
13 in the delivered stack

Services delivered

Before and after

A fast-growing FinTech handling sensitive customer data lacked enterprise-grade security and had no automated enforcement of PCI-DSS and RBI guidelines, while manual deployments caused downtime.

Before

  • Compliance had to be enforced automatically, not by manual review.
  • There was no central monitoring, logging or audit trail, and no structured disaster recovery.
  • The platform had to scale through peak transaction hours without outages or breaches.

After

  • Zero critical security incidents after go-live
  • 99.99% platform availability
  • 35% lower cloud infrastructure cost

The solution

Solution path

  1. Code
  2. SAST + dependency scan
  3. Image scan
  4. IaC policy check
  5. Amazon EKS

How it was delivered

  1. Phase 1

    Architected a multi-AZ AWS VPC with strict network segmentation and microservices on Amazon EKS.

  2. Phase 2

    Built DevSecOps pipelines with SAST, dependency scanning, container image scanning and Terraform policy checks, plus least privilege through IAM and IRSA.

  3. Phase 3

    Protected the edge with AWS WAF and Shield, kept secrets in Secrets Manager, encrypted everything, and audited with CloudWatch, CloudTrail, GuardDuty and AWS Config.

Technology stack

  • Amazon EKS
  • Docker
  • Terraform
  • AWS WAF
  • AWS Shield
  • AWS Secrets Manager
  • AWS IAM
  • Amazon CloudWatch
  • AWS CloudTrail
  • Amazon GuardDuty
  • AWS Config
  • Amazon RDS PostgreSQL
  • Amazon S3

Questions about this project

Which security checks run in the pipeline?

Every change passes static code analysis (SAST), dependency vulnerability scanning, container image scanning and Terraform policy checks before it can deploy to Amazon EKS.

Did security make the platform slower or costlier?

No. Deployments became 40% faster and cloud infrastructure cost fell by 35%, while the platform reached 99.99% availability with zero critical security incidents after go-live.

Related services

DevSecOps ServicesSecurity testing, scanning, secrets and policy as code inside CI/CD.Cloud Security ServicesAssessments, IAM hardening, posture management, VAPT and compliance automation.Managed Kubernetes ServicesDesign, security, upgrades and operations for EKS, AKS and GKE clusters.

Related technical articles

Case study · InsightsHow We Built a Secure and Compliant FinTech Platform on AWS Using DevSecOps (opens on insights.celestibia.com)
Read the full case study on Celestibia Insights

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