65%
Reduction in Technical Debt
organisations completing structured modernisation programmes vs. ad-hoc refactoring approaches
4×
Deployment Frequency
modern cloud-native platforms ship features 4× faster than legacy monolithic systems
40%
Lower Maintenance Costs
post-modernisation operational savings on average for Saudi enterprise workloads
What We Do

Legacy systems become bottlenecks.
We transform them into assets.

In a digital economy, outdated applications constrain growth, increase risk, and drain engineering capacity. Crux Enterprise Application Modernization helps organisations update, re-architect, and modernise mission-critical platforms — accelerating performance, maintainability, and innovation.

We specialise in transitioning legacy platforms to modern architectures — cloud-native, microservices, and API ecosystems — enhancing agility, resilience, and competitive advantage in Saudi Arabia's finance, healthcare, and government sectors.

crux — modernisation-engine
~ crux-modern assess --target legacy-monolith
✓ Analysed: 847 components · 124K lines of code
✓ Dependencies: 34 critical · 12 decommissionable
✓ Risk score: MEDIUM → roadmap generated
~ crux-modern plan --strategy strangler-fig
✓ Phase 1: API extraction (6 services identified)
✓ Phase 2: Data layer migration to PostgreSQL 15
✓ Phase 3: UI rebuild → Next.js (Lighthouse 98)
~ status: Phase 1 complete · 0 downtime · on schedule
█Production healthy · tech debt reduced 41%
Core Capabilities

End-to-end modernisation.
Every legacy scenario.

Legacy Assessment & Modernisation Roadmap

Before a single line changes, we map your entire application estate — identifying risk, opportunity, and the optimal modernisation path for each system component.

  • Application portfolio audit — Catalogue every system, dependency, and integration point across the enterprise.
  • Technical debt quantification — Measure the cost of inaction and prioritise intervention by business impact.
  • Strategy selection — Choose the right approach per system: rehost, replatform, refactor, rebuild, or retire.
  • Business case & ROI — Justify investment with financial models that speak to board and C-suite decision-makers.
01
Portfolio Assessment
Core Banking Platform
Monolith · High risk · Refactor
Customer Portal
React frontend · Replatform
Reporting Engine
Legacy COBOL · Retire + Rebuild
API Gateway
None · Enable · Greenfield

Refactoring & Microservices Decomposition

Decompose monolithic applications into scalable microservices — eliminating fragility of tightly coupled systems and enabling independent deployment of business capabilities.

  • Strangler-fig pattern — Incrementally replace monolith components — zero big-bang risk, production always live.
  • Domain-driven decomposition — Identify bounded contexts and define service boundaries aligned with business domains.
  • Database per service — Migrate shared databases to isolated data stores that scale independently.
  • Event-driven decoupling — Introduce asynchronous messaging (Kafka) to eliminate synchronous dependencies.
02
Decomposition Progress
Auth Service
Extracted · deployed · healthy
Payment Service
Extracted · 0 incidents since go-live
Notification Svc
In progress · 80% complete
Reporting Svc
Planned · Q3 sprint

API Enablement & Ecosystem Integration

Transform closed legacy systems into open, composable API ecosystems — enabling rapid integration, partner connectivity, and the foundation for AI and analytics adoption.

  • API gateway design — Unified API layer over legacy backends — REST, GraphQL, and gRPC interfaces built for developer experience.
  • Legacy system wrapping — Expose existing functionality through modern API contracts without requiring full system replacement.
  • Third-party integration — SAP, Salesforce, Oracle, and sector-specific platform connectors for Saudi enterprise ecosystems.
  • Developer portal — Self-service documentation, sandbox testing, and onboarding for internal and partner teams.
03
API Gateway Status
GET /api/v2/accounts
238ms → 14ms post-modernisation
POST /api/v2/payments
Legacy SOAP → REST
GET /api/v2/reports
Async · event-driven
Total APIs Exposed
67 APIs · 12 deprecated

UX Revamp & Digital Interface Redesign

Modernised backends deserve modern frontends. We rebuild dated interfaces into responsive, accessible, data-driven experiences designed for Arabic and English enterprise users.

  • User research & journey mapping — Understand how enterprise users actually interact with legacy systems before redesigning anything.
  • Design system creation — Reusable component libraries that ensure consistency across every interface touch-point.
  • Performance engineering — Achieve sub-2s load times and 90+ Lighthouse scores through modern front-end architecture.
  • Accessibility & RTL support — Full Arabic/English bilingual support with WCAG 2.1 AA compliance for Saudi enterprise users.
04
Interface Transformation
Lighthouse Score
47 → 98
Load Time
8.4s → 1.2s
Core Web Vitals
POOR → GOOD
Arabic RTL Support
None → Full
How We Deliver

Structured. Risk-controlled. Delivered.

No big-bang rewrites. No production disruptions. A phased approach that keeps your business running while systematically eliminating technical debt.

01
Assess & Prioritise
Full portfolio audit, technical debt scoring, and business impact mapping delivered as a board-ready modernisation roadmap.
Portfolio AuditDebt ScoringImpact MapStrategy Selection
02
Architect & Plan
Define target architecture, migration patterns, and phase-by-phase execution plan with risk controls at every step.
Target ArchitectureMigration PatternsRisk ControlsPhase Planning
03
Modernise & Migrate
Execute incremental modernisation using strangler-fig, parallel-run, and blue/green strategies — zero production downtime.
Strangler-FigParallel RunBlue/GreenZero Downtime
04
Integrate & Validate
Connect modernised components, validate performance, and verify full functional parity with the legacy baseline.
Integration TestingPerformance BaselineRegression SuiteUAT Sign-off
05
Optimise & Evolve
Post-migration monitoring, performance tuning, AI integration, and continuous improvement cycles.
Performance TuningAI IntegrationCost OptimisationContinuous Improvement
Client Outcome
"Crux transformed a 12-year-old monolith into a modern microservices platform in seven months — without a single hour of production downtime. The system now deploys independently across 8 services and maintenance overhead dropped by 43%. Our engineering team finally has time to build instead of maintain."
CT
Chief Technology Officer
Saudi Financial Services Group · Riyadh
-43%
Maintenance cost reduction post-modernisation
7 mo
Monolith to microservices — zero downtime
8
Independent services now deployed separately
98
Lighthouse performance score achieved
Technology Stack — Best-in-class tools · No vendor lock-in
Strangler-Fig Microservices Docker Kubernetes Next.js React PostgreSQL Kafka REST APIs GraphQL dbt Terraform AWS Azure GitHub Actions ArgoCD PDPL Compliant OpenAPI Strangler-Fig Microservices Docker Kubernetes Next.js React PostgreSQL Kafka REST APIs GraphQL dbt Terraform AWS Azure GitHub Actions ArgoCD PDPL Compliant OpenAPI

Extend your modernisation capability.

SVC / 02
Intelligent Application Engineering
Build net-new AI-enabled applications on the modern foundations your programme creates.
Explore service
SVC / 04
Cloud & DevOps Transformation
Deploy modernised applications with enterprise-grade cloud infrastructure and CI/CD pipelines.
Explore service
SVC / 05
Data Engineering & Analytics
Unlock data trapped in legacy systems with modern pipelines and analytics platforms.
Explore service
// ready to modernise

Transform legacy liability into
competitive advantage.

Phased. Risk-controlled. Zero downtime. Engineered for the regulatory and operational realities of Saudi Arabia's most demanding enterprise environments.

Start Your Modernisation Assessment Schedule a Technical Consultation