Legacy Modernization · Saudi Arabia

Legacy System
Modernization

Legacy systems create technical debt, prevent AI adoption, and block Vision 2030 digital transformation. Crux modernizes your enterprise applications without disrupting operations.

Start Modernization See Capabilities
60%
Cost reduction
8 Weeks
First delivery
Zero Downtime
Migration approach
Vision 2030
Fully aligned
legacy_system.cobol — BEFORE
IDENTIFICATION DIVISION.
PROGRAM-ID. ACCTPRC.
ENVIRONMENT DIVISION.
DATA DIVISION.
01 ACCT-REC.
05 ACCT-NUM PIC 9(8).
05 ACCT-NAME PIC X(30).
05 ACCT-BAL PIC 9(10)V99.
PROCEDURE DIVISION.
OPEN I-O ACCOUNT-FILE
PERFORM UNTIL END-OF-FILE
READ ACCOUNT-FILE
IF ACCT-BAL > 999999
MOVE "OVERLIMIT" TO STATUS
END-IF
END-PERFORM
CLOSE ACCOUNT-FILE
STOP RUN.
* Error: deprecated ACCEPT verb
* Warning: 47 undocumented sections
* Last updated: 2003
47 warnings COBOL 1985 No tests
Crux Modernization
account_service.py — AFTER
from
fastapi
import
FastAPI, APIRouter
from
app.models
import
Account
from
app.ai
import
RiskEngine
# Cloud-native · PDPL compliant · AI-ready
router
=
APIRouter(prefix="/accounts")
@router.get(
"/{account_id}")
async def
get_account(id: str):
account =
await
Account.get(id)
risk_score =
RiskEngine.score(account)
return
{"data": account, "risk": risk_score}
# 100% test coverage · Docker · K8s ready
# Deployed: AWS Saudi · 99.97% uptime
0 warnings Python 3.11 100% tested
60%
Cost Reduction
Enterprise clients reduce system operational costs by 60% on average after Crux-led modernization
8 Weeks
First Delivery
Phased approach delivers working modernized components from week 8, minimizing business disruption
Zero
Downtime Migrations
Parallel-running strategy ensures continuous business operations throughout the entire migration
100%
Saudi Compliant
All modernized systems built to PDPL, NDMO cloud standards and Saudi infrastructure requirements
Modernization Capabilities

Five paths to modern enterprise systems.

Legacy Application Assessment

Deep technical audit of your legacy codebase — identifying technical debt, security vulnerabilities, integration dependencies and modernization risks before any code changes begin.

AssessmentRisk mapping
Architecture Redesign and Refactoring

Systematic redesign from monolithic legacy patterns to modular, testable, cloud-native architectures — preserving business logic while eliminating architectural debt.

RefactoringMicroservices
Cloud-Ready Transformation

Rearchitect applications for cloud deployment on AWS Saudi or Azure KSA — with containerization, auto-scaling, and cloud-native service integration.

Cloud migrationContainerization
Technology Stack Upgrades

Replace obsolete languages, frameworks and databases with modern technology stacks — Python, Node.js, React, PostgreSQL — with comprehensive test coverage.

Stack upgradeAPI modernization
Security Hardening

Modernized systems rebuilt with security-by-design — OWASP standards, PDPL-compliant data handling, encryption at rest and in transit, and automated vulnerability scanning.

Security auditPDPL compliance
Performance Optimization

Identify and eliminate performance bottlenecks — query optimization, caching layers, async processing, and CDN integration — delivering 10x response time improvements.

PerformanceLoad testing
Our Approach

Phased modernization.
No big-bang risk.

Crux never advocates big-bang rewrites. We modernize in phases — delivering value from week 8 while the legacy system continues running in parallel, ensuring zero business disruption throughout the programme.

Each phase delivers production-ready modernized components — so your organization starts realizing cost savings and performance improvements before the full programme completes.

Get Modernization Assessment
01
Discovery and Assessment
2-3 weeks

Deep technical audit: codebase analysis, dependency mapping, security assessment, data model review and modernization roadmap definition.

02
Architecture Design
2-3 weeks

Design target architecture, define migration strategy, select technology stack, establish testing framework and create parallel-running plan.

03
Phase 1 Modernization
6-8 weeks

Modernize highest-value or highest-risk components first — delivering working production components with full test coverage.

04
Parallel Running
4-6 weeks

Run modernized and legacy systems in parallel — validating functional parity, performance benchmarks and data integrity before cutover.

05
Phase 2+ Rollout
Ongoing

Complete remaining components in priority order — each phase delivered with production deployment, monitoring and team handover.

Technology Transformation

From legacy stack to modern platform.

Legacy Technology
What We Replace With
Benefit
Timeline
COBOL / FORTRAN
Python / Java microservices
10x dev speed
6-8 wks
Oracle Forms / VB6
React / Angular SPA
Modern UX
4-6 wks
On-prem MSSQL
PostgreSQL / Cloud DB
Scalability
3-4 wks
File-based integration
REST API / Event streams
Real-time data
4-5 wks
Manual deployments
CI/CD pipelines (GitHub Actions)
Faster releases
2-3 wks
No monitoring
Datadog / CloudWatch + AI ops
Proactive uptime
2 wks
FAQ

Legacy modernization questions answered.

QHow long does legacy system modernization take in Saudi Arabia?
Legacy system modernization projects typically take 16-36 weeks depending on system complexity, data volume and integration requirements. Crux uses a phased approach — delivering working modernized components from week 8 onwards to minimize business disruption.
QWhat are the risks of legacy system modernization?
The primary risks are business continuity during migration, data integrity during transformation, and staff adoption. Crux mitigates these through parallel-running strategies, comprehensive data validation, automated regression testing, and change management programmes built into every engagement.
QHow does legacy modernization support Vision 2030 in Saudi Arabia?
Vision 2030 requires enterprises to operate on modern digital platforms capable of integrating AI, enabling data-driven decisions, and supporting rapid service innovation. Legacy systems prevent this. Crux modernization programmes specifically target the capabilities needed for Vision 2030 compliance and competitive advantage.
QCan legacy modernization be done without replacing the existing system?
Yes. Crux uses multiple modernization patterns including strangler-fig (incrementally replacing components), anti-corruption layers (wrapping legacy with modern APIs), and selective refactoring — allowing you to modernize at your own pace without a disruptive big-bang replacement.
"
We had a 25-year-old COBOL system running our core finance operations. Nobody wanted to touch it. Crux modernized it in 22 weeks — zero downtime, zero data loss, and our developers actually want to work on it now.
CTO
Chief Technology Officer
Saudi National Bank · Riyadh, KSA
22wk
Delivery
Zero
Downtime
58%
Cost saved
Related Services

Modernization opens the door to more.

All Services
Next Step
Monolith to Microservices
Break down your newly modernized system into scalable microservices architecture.
Explore
Next Step
Cloud Native Modernization
Deploy your modernized applications on cloud-native infrastructure with Kubernetes.
Explore
AI Ready
Enterprise AI Integration
Connect AI capabilities to your newly modernized platform for competitive advantage.
Explore
Start Modernization

Stop managing
technical debt.

Phased delivery. Zero downtime. Saudi-based team. Crux transforms your legacy systems into modern platforms that can support AI, cloud and Vision 2030 digital ambitions.

Get a Free Assessment All Services