Payday Fintech

A secure, automated, and observable Kubernetes delivery platform enabling continuous deployment, compliance-ready security gates, and SLO-driven operations for Payday's payments API.

📖 Overview

Problem: Payday's engineering team released weekly but suffered frequent deployment failures, environment drift, slow rollbacks (~45 min), and regulatory friction due to inconsistent audit trails. Solution: This platform replaces manual processes with a developer-first, security-by-design GitOps pipeline that: ✅ Automates build → test → scan → sign → deploy ✅ Enables safe canary/blue-green releases with automatic SLO-based rollback ✅ Provides full-stack observability (metrics, logs, traces) tied to business SLOs ✅ Enforces least-privilege access, encrypted secrets, and policy-as-code ✅ Reduces rollback time to <2 minutes and change failure rate to <2%

Architecture;

Developer → GitHub → CI Pipeline → Docker Image → Security Scan → Registry (ECR) → GitOps Repo → Argo CD → Kubernetes Cluster → Observability Stack (Prometheus + Grafana + Loki + Jaeger)

Graphical representation- LR A[Developer Push] --> B[GitHub Actions CI] B --> C[Tests + SAST + Trivy Scan + Cosign Sign] C --> D[Push to GHCR] D --> E[Update GitOps Manifest] E --> F[Argo CD Sync] F --> G[Argo Rollouts Canary] G --> H[Prometheus/Grafana SLOs] H --> I{SLO Breach?} I -->|Yes| J[Auto-Rollback <2m] I -->|No| K[Promote 100% Traffic] style A fill:#E0E7FF style J fill:#FEE2E2 style K fill:#D1FAE5

🛠️ Tech Stack

Category Tool Purpose Cloud & Cluster AWS EKS, VPC, KMS Managed Kubernetes with encrypted control plane & secrets Infrastructure as Code Terraform Declarative provisioning of VPC, EKS, IAM, KMS, S3 CI/CD GitHub Actions Automated testing, scanning, signing, and GitOps updates GitOps & Deployment Argo CD, Declarative sync, canary/blue-green strategies Argo Rollouts Package Management Helm Templated, environment-aware Kubernetes manifests Observability Prometheus, Metrics, logging, tracing, SLO dashboards, alerting Grafanna, Loki, Jaeger. Security & Policy Trivy, Cosign, CVE scanning, image signing, admission control, KMS-backed secrets QPA/Gatkeeper, External Secrets. Backup & DR Velero Cluster & stateful workload backup/restore to S3 Autoscaling HPA, KEDA CPU/memory & event-driven scaling with cost-aware quotas

Repository Structures

. ├── infra/terraform/ # AWS VPC + EKS + IAM + KMS provisioning ├── .github/workflows/ # CI/CD pipeline definitions ├── charts/payday/ # Helm chart + Argo Rollouts config ├── argocd/apps/ # GitOps Application & ApplicationSet manifests ├── observability/ # Prometheus, Grafana, Loki, Alertmanager configs ├── runbooks/ # Incident response, rollback & recovery procedures ├── docs/ # Architecture diagrams, demo scripts, compliance mapping └── README.md

Payday Infrastructure Resources Management by Terraform

Terraform code to provision:

• AWS VPC
• EKS Kubernetes Cluster
• Remote Terraform state (S3)

Setup

1. Install Terraform & AWS CLI
2. Configure AWS credentials
3. Run:

terraform init terraform plan terraform validate terraform apply

Kubernetes & Helm Charts