CodeRenew: AI-Powered Code Modernization at Enterprise Scale

Transform decades of code in months, not years

Faster, cheaper, safer. CodeRenew modernizes legacy code by supercharging seasoned engineers with GenAI.

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~50%
Faster Delivery
AI-assisted comprehension compresses months into weeks
30-50%
Lower Program Cost
Automation trims manual analysis and rework
3x
Fewer Post-Go-Live Defects
Automated testing reduces cutover risk

Technology defines market winners, yet firms stuck in legacy system quagmires

-20%

Lower operating margins for companies outside the top-quartile IT capabilities

70-80%

IT budget dedicated to maintaining legacy systems

80%

Legacy code modernization projects that fail to meet objectives

5:1

Time ratio to add a new feature to legacy systems over modern systems

Every year legacy systems cost more to maintain and deliver fewer new features

Meet CodeRenew: Human+GenAI, built for legacy reality

AI changes the game, but only with the right approach

GenAI Advantage

  • Analyze in hours vs months
  • Order of magnitude reduction in human capital needs
  • Automated test generation catches edge cases

Humans Govern

  • Expert architect oversight prevents technical debt
  • Domain experts ensure critical business context
  • Human validation prevents false confidence

AI Accelerates

  • Generate and test modernized code automatically
  • Map dependencies across millions of lines
  • Extract business rules from code behavior

The CodeRenew Approach: Humans Govern; AI Accelerates

A proven methodology combining human expertise with AI power

1. DIAGNOSIS

Architecture Review

GenAI:

  • • Extract business rules from code
  • • Map dependencies across millions of lines
  • • Find dead code and technical debt

Human Experts:

  • • Validate extracted rules with stakeholders
  • • Identify legacy behaviors to preserve vs retire
2. DESIGN

New Architecture

GenAI:

  • • Propose target architectures
  • • Generate strangler fig transition plans
  • • Calculate migration effort by subsystem

Human Experts:

  • • Prioritize modernization targets
  • • Design API boundaries for decoupling
3. IMPLEMENTATION

Testing & Rollout

GenAI:

  • • Generate and test modernized code
  • • Stress-test edge cases
  • • Create migration scripts

Human Experts:

  • • Refine AI code for production standards
  • • Coordinate cutover windows
  • • Drive QA strategy
4. OPERATIONS

Ongoing Support

GenAI:

  • • Monitor parallel runs for discrepancies
  • • Ensure 100% test coverage

Human Experts:

  • • Collect and triage user feedback
  • • Manage stakeholder concerns
  • • Knowledge transfer to your team

Why CodeRenew: No Lock-In, Just Lift-Off

Traditional Vendors: Lock-In

  • 🔒
    Create Dependency
    Multi-year contracts, proprietary tools, ongoing maintenance fees
  • 💰
    You Bear All Risk
    Fixed fees regardless of outcome. Failed projects still get paid
  • 🐢
    Enterprise Pace
    6-month assessments, 18-month implementations

CodeRenew Approach: Lift-Off

  • 🚀
    Build Your Capability
    Knowledge transfer built-in. Your team owns the code. No CodeRenew runtime required
  • 🤝
    Share Your Risk
    30% base / 70% performance-based. We earn when code works in production
  • ⚡
    Startup Speed
    2-week assessments. Latest AI models. Small teams, fast decisions

Case Study: Tier-1 EU Auto OEM

From 'too risky to touch' to clear modernization roadmap in 2 weeks

Challenge

  • • 30-year-old homegrown stack coordinating €60M p.a. maintenance budget
  • • 20M lines of thin/undocumented code
  • • Hidden crisis: Duplicate systems doing same work (3x cost)
  • • WAS end-of-life exposing security vulnerabilities
  • • Zero production observability
  • • Talent drain: original developers retiring at alarming rate
  • • "Too risky to touch"—but also too risky NOT to touch

Solution

  • • CodeRenew AI + architect analyzed entire codebase in 2 weeks (vs. 6 months manual process)
  • • Revealed dead code, duplicate systems and critical vulnerability
  • • Mapped critical dependencies, interfaces, data flows and extract business rules
  • • First productive workshop in 8 years—IT team shifted from blockers to partners
2 weeks
Full documentation
(vs. 6-month manual process)
85%
Estimated reduction in change request time
€30M
Estimated annual operating profit increase

A Sample Modernization 6-Month Journey

Structured approach from diagnosis to full rollout

Weeks 0-4

1. Diagnosis

  • • Deploy AI agents to analyze codebase
  • • Map system dependencies
  • • Interview SMEs and retiring engineers
  • • Identify technical debt hotspots
Key Deliverables:
  • ✓ Complete system documentation
  • ✓ Risk heat map and quick wins
  • ✓ Migration complexity scoring
Weeks 4-8

2. Proof of Value

  • • Select low-risk, high-value module
  • • Extract and validate business rules
  • • Generate modernized code with AI
  • • Build comprehensive test suite
Key Deliverables:
  • ✓ Working modernized component
  • ✓ 100% test coverage achieved
  • ✓ Performance benchmarks
Weeks 8-16

3. Parallel Modernization

  • • Deploy shadow mode in production
  • • Compare outputs legacy vs new
  • • Stress test edge cases
  • • Train internal team on new stack
Key Deliverables:
  • ✓ Zero-discrepancy validation
  • ✓ Rollback procedures tested
  • ✓ Operations runbook
Weeks 16-24

4. Progressive Rollout

  • • Canary deployment (5% → 100%)
  • • Decommission legacy incrementally
  • • Expand to adjacent systems
  • • Optimize based on prod metrics
Key Deliverables:
  • ✓ Full production migration
  • ✓ Team certification complete
  • ✓ Zero CodeRenew dependencies

Meet Our Co-founders

Peter Lovíšek

Peter Lovíšek

Co-founder & CEO

Peter Lovíšek is an IT Architect with a strong background in software development and over 20 years of experience delivering enterprise solutions. After a decade coding in Java, Python, PHP, and JavaScript on IBM AIX and Linux, he moved into architecture and consulting, focusing on system modernization and technology strategy.

At Deloitte, Peter has led architecture and transformation projects for major German industrial clients including BMW, Volkswagen, Mahle, Schaeffler, Knauf, and Giesecke+Devrient. His expertise combines deep technical insight with strategic leadership, helping organizations modernize their systems, teams, and processes.

LinkedIn →
Haihao Wu

Haihao Wu

Co-founder & COO

Haihao brings 20+ years of experience leading large-scale technology transformations, including serving as Head of Launch Office for a $3B greenfield wireless operator build in the Philippines and managing a year-long digital transformation for a tier 1 ISP in Australia. With deep expertise spanning telecom strategy, M&A due diligence, and operational excellence, he has guided Fortune 500 carriers, equipment manufacturers, and investors through complex technology deployments and business model transitions.

LinkedIn →

Legacy Systems We Transform

IBM
COBOL
DB2
Web
Sphere
AS/400
Oracle
Mainframe

Ready to Transform Your Legacy Systems?

Let's discuss how CodeRenew can help modernize your enterprise code faster, cheaper, and safer.

Schedule a consultation to learn how we can help you break free from legacy system constraints and accelerate your digital transformation.

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