Shafqatism LLC
Software Development

Legacy Software Modernization

Migrate brittle legacy monoliths to modern, cloud-native microservice architectures using the Strangler Fig pattern, automated database refactoring, and containerization with zero business downtime.

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STRANGLER FIG MODERNIZATIONZero-Downtime Strangler RoutingAPI Gateway • Shadow Traffic ParityChange-Data-Capture (CDC) SyncDebezium Dual-Write • Instant Fallback10x Speed Boost & DockerizationKubernetes Microservices • Redis Cache0 DowntimeStrangler FigCDC DatabaseReal-Time Sync10x SpeedRedis & K8sAutomated QAParity Test Harness
### Transform Brittle Legacy Monoliths into Agile, Cloud-Native Systems Without Business Downtime Aging legacy software architectures (outdated PHP, .NET Framework, monolithic Java, COBOL, or unmaintained databases) severely throttle business innovation: slow feature releases, severe security vulnerabilities, high cloud hosting costs, and catastrophic crashes. **Shafqatism LLC** modernizes mission-critical legacy applications using the proven **Strangler Fig architectural pattern, microservice decoupling, database migration pipelines, and Docker/Kubernetes containerization**. We incrementally modernize your codebase piece-by-piece, ensuring **zero operational downtime and zero business disruption**. --- ### Modernization Methodologies - **The Strangler Fig Pattern**: Incrementally replacing legacy endpoints with modern microservices behind an intelligent API Gateway until the monolith is retired safely. - **Zero-Downtime Database Refactoring**: Dual-writing and change-data-capture (CDC via Debezium) pipelines syncing data in real time during migration. - **Containerization & Cloud Native**: Moving on-premise servers into Docker containers orchestrated on Kubernetes/AWS with automated CI/CD. - **Automated Regression Test Harness**: Creating end-to-end characterization test suites to guarantee that modern services replicate business rules perfectly.

Pricing

Indicative pricing — use the calculator to build a full estimate.

Legacy Audit & Strangler MVP

Ideal for evaluating legacy technical debt and modernizing the first mission-critical module with an API gateway.

$6,499

per project · per phase

  • Complete Legacy Codebase & Security Vulnerability Audit
  • Strangler Fig Migration Architecture Roadmap Blueprint
  • Intelligent API Routing Gateway Setup (Zero Downtime)
  • Extraction of First High-Priority Legacy Module
  • Automated Characterization Test Suite for Target Module
  • Modern TypeScript / Next.js / NestJS Service Coding
  • Real-Time Change-Data-Capture (CDC) Dual-Write Sync
  • Full Monolith Decommissioning & Data Migration
Begin Modernization Audit
Most popular

Monolith Decoupling Pro

Comprehensive legacy decomposition, zero-downtime database dual-writing, and Docker containerization.

$14,999

per project · per project

  • Everything in Legacy Audit & Strangler MVP
  • Extraction of Up to 5 Core Business Modules
  • Real-Time Change-Data-Capture (CDC) Database Migration
  • Docker Containerization & Kubernetes Staging Setup
  • Shadow Traffic Testing & Parity Verification
  • 10x Performance Optimization with In-Memory Redis
  • Modern REST & GraphQL Developer API Gateway
  • Dedicated SLA Maintenance Retainer
Decouple Monolith Pro

Full Enterprise Cloud Migration

End-to-end enterprise modernization, complete monolith decommissioning, and 24/7 hypercare support.

$28,999

per project · per migration

  • Complete Legacy Monolith Decomposition & Retirement
  • Multi-Region Kubernetes Cloud Native Architecture
  • Distributed Event Streaming (Apache Kafka / RabbitMQ)
  • Zero-Downtime Production Cutover Guarantee
  • Comprehensive Engineering Team Training Workshops
  • SOC 2 & ISO 27001 Security Hardening Certification
  • Dedicated Senior Modernization Systems Architect
  • 90 Days VIP Hypercare & SLA Support Included
Execute Enterprise Migration

What’s included

Strangler Fig Migration Strategy

Incrementally decomposing monoliths behind a routing gateway with zero downtime or business interruption.

Zero-Downtime Database Migration

Change-Data-Capture (CDC) pipelines synchronizing legacy and modern databases in real-time during transition.

Docker & Kubernetes Containerization

Packaging applications into portable containers running on automated, auto-scaling cloud infrastructure.

Security Vulnerability & CVE Remediation

Eliminating outdated insecure libraries, upgrading cryptographic protocols, and hardening API endpoints.

Automated Test Harness & Characterization

Writing automated characterization test suites verifying that modernized code mirrors legacy business logic.

10x Performance & Latency Boost

Replacing sluggish legacy queries with in-memory Redis caching, indexing, and asynchronous task queues.

Modern REST & GraphQL API Gateways

Wrapping legacy backend functions in clean, documented RESTful and GraphQL endpoints for mobile and web apps.

Real-Time Telemetry & Observability

Instrumenting distributed tracing (OpenTelemetry/Datadog) across both legacy and modern service nodes.

How we work

1

Legacy Codebase & Architecture Audit

We reverse-engineer legacy code, identify security vulnerabilities, map database dependencies, and benchmark latency.

2

Modernization Roadmap & Strangler Blueprint

We formulate a phased Strangler Fig migration roadmap, prioritizing high-value, low-risk modules for initial extraction.

3

Automated Regression Test Harness Setup

We build end-to-end automated characterization tests capturing existing legacy outputs to verify parity during migration.

4

Intelligent API Routing Gateway Setup

We deploy an API gateway routing incoming traffic seamlessly between the legacy monolith and newly built modern microservices.

5

Iterative Microservice & Database Migration

We build modern services in TypeScript/Go and migrate database tables using real-time Change-Data-Capture (CDC) dual-writes.

6

Parallel Production Verification Run

We run modern and legacy services in parallel shadow mode to compare response parity and guarantee zero data discrepancies.

7

Complete Traffic Cutover & Monolith Decommission

We switch 100% of production traffic to the new cloud-native microservices and safely decommission the legacy monolith.

8

Team Training & Continuous Cloud Observability

We conduct engineering team training on the modern stack, configure Sentry/Datadog monitoring, and hand over documentation.

Frequently asked questions

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