Modernizing a FinTech Monolith
to Next.js 15 & Kubernetes.
A fast-growing FinTech platform was suffering from frequent outages and slow developer deployment cycles. We modernized their 10-year legacy backend into Next.js 15 and multi-region Kubernetes with zero downtime.
14-hour deployments and recurring database lockouts.
A 10-year-old Ruby on Rails monolith on overloaded relational databases was causing 99.2% uptime SLAs, frequent database row-locking deadlocks, and multi-hour deployment freezes.
Strangler Fig migration to Next.js 15 & AWS Aurora.
We extracted high-traffic domains behind an Envoy proxy facade, established real-time CDC synchronization with Debezium, and deployed sub-100ms Next.js 15 frontends paired with resilient Kubernetes microservices.
Modernization architecture components.
Next.js 15 App Router Frontend
Next.js 15, TypeScript, Vercel EdgeReact Server Components with edge streaming and optimistic UI, cutting load times by 75% on mobile.
Multi-Region Kubernetes (AWS EKS)
AWS EKS, Cilium, Karpenter, IstioCilium eBPF mesh with Karpenter node autoscaling handling 100,000 requests/sec during peak financial trading windows.
Zero-Downtime Database Migration Engine
Debezium, Apache Kafka, AWS DMSMigrated 2.8 Terabytes of active banking transaction records from legacy MySQL 5.7 to AWS Aurora PostgreSQL using Debezium CDC.
GitOps CI/CD & Automated Canaries
ArgoCD, GitHub Actions, HelmArgoCD and Argo Rollouts shifting production traffic progressively with automatic metric-based rollback.
Ready to modernize your legacy tech stack?
Book a zero-downtime architecture migration review with our senior engineers.