10decodersModernize legacy systems
without the disruption.
We assess, refactor, and re-platform legacy applications into modern, cloud-ready architectures — delivered with full functional parity, security by design, and zero production drama.
Trusted by leading enterprises and healthcare teams
Replace legacy complexity with future-ready systems.
Engineering-led transformation across the full spectrum of legacy platforms — preserving core business logic while improving scalability, performance, and integration with modern, cloud-native architectures.
PowerBuilder Migration
Modernize PowerBuilder applications to contemporary architectures while preserving core business logic — improving scalability, performance, maintainability, and integration with modern platforms.
COBOL Migration
Upgrade COBOL-based systems using rehosting, refactoring, or rearchitecting approaches — reducing operational risk, improving agility, and aligning mainframe applications with modern enterprise needs.
Oracle Forms Migration
Transform Oracle Forms applications into responsive web or cloud-native experiences — achieving better usability, flexibility, and seamless API-driven integration.
Oracle Reports Migration
Refactor Oracle Reports to enable real-time analytics, interactive reporting, and better enterprise-wide decision-making.
Crystal Reports Migration
Convert Crystal Reports into secure, scalable, and interactive reporting solutions for modern business intelligence needs.
Legacy systems, re-engineered for the future.
Representative modernization engagements across regulated industries — focused on the outcomes that matter. Client identities are confidential.
Legacy clinical platform to a cloud-ready stack
- Full functional parity preserved
- HIPAA-aligned security & access
- Anywhere access across web & mobile
- Ready for EHR/EMR integration
Monolithic financial platform re-architected
- Core logic decoupled into secure APIs
- Integration-ready for FinTech partners
- Faster, safer releases via DevOps
- Regulatory-grade access control
Desktop HRMS to a modern web platform
- Unified employee, leave & payroll services
- Automated approval workflows
- Secure role-based access
- Connectors to payroll & reporting systems
Legacy desktop estate to modern web
- Improved performance & stability
- Maintainable, modular architecture
- Cleaner integration with enterprise systems
- Future-ready for cloud enablement
End-to-end services, full ownership.
We cover the complete modernization lifecycle — built for applications that are undocumented, security-sensitive, and tightly integrated across complex landscapes.
Assessment
Refactoring
Validation
Testing
Production Deployment
End-to-end delivery ownership
Undocumented legacy systems
Automated refactoring + validation
Parallel testing + rollout
Security-aligned modernization
Integration-aware delivery
Production-grade outcomes
Free modernization assessment
An operating model built for certainty.
Years of working inside complex, mission-critical systems — where downtime was not an option — have shaped a repeatable model that prioritizes validation and controlled change.
Understand with certainty
Establish a reliable view of system behaviour, dependencies, and risk — without relying on documentation or tribal knowledge.
Change with guardrails
Refactor and re-architect while continuously validating behaviour, preserving functional parity as changes are introduced.
Move without disruption
Plan integrations and releases with production constraints in mind, ensuring stability throughout rollout and go-live.
Trusted on mission-critical programs.
What enterprise leaders say about partnering with 10decoders on modernization. Names and organizations are withheld for confidentiality.
Outstanding support and dedication throughout our IT modernization program. Professionalism, technical expertise, and commitment to excellence were evident in every phase — from planning and development to implementation and support. We transitioned to a more robust, efficient, and future-ready architecture.
Verified engagementThey ramped up quickly, aligned business and engineering, and delivered measurable results within weeks. Documentation was clear and actionable, enabling thorough analysis, smooth deployments, and confident go-lives. Self-motivated and proactive — I highly recommend them on mission-critical projects.
Verified engagementThe team learned our domain rapidly and established clear BA artifacts that accelerated engineering. Thorough documentation enabled deep analysis and smooth handoffs, and they stayed close during cutovers to ensure stable go-lives. Their ownership mindset stood out — strongly recommended for end-to-end delivery on large programs.
Verified engagementYour team is a trusted delivery partner for my program — consistently dependable across leadership and end-to-end delivery. The kind of partner you want on the programs that matter most.
Verified engagementModernization, answered.
Common questions about upgrading legacy systems, transition strategies, and how we deliver with zero disruption.
What is application modernization?
Why should enterprises modernize legacy systems?
How do you determine the right modernization approach?
How long does a modernization project take?
Do you support post-modernization maintenance?
Your first step into modernization clarity.
Pick what suits your team. Either way, you'll come away with a clear, evidence-based picture of your legacy application and a path forward.
Free codebase assessment
Share a read-only view of your codebase and we'll return an evidence-based picture of what's there.
- Functional & technical documentation
- Architecture & integration maps
- Risk & complexity heatmap
- Sample modernized UI screens
Architecture & approach review
Walk through our modernization operating model with our engineering team for your specific landscape.
- Target reference architecture
- Migration approach for your estate
- Security & compliance considerations
- Phased delivery & rollout plan
Modernization, demystified.
Straight answers about timelines, risks, technologies, and where to start.
Should I rehost, refactor, replatform, rearchitect, or rebuild my legacy application?
There’s no universal answer — it depends on business goals, compliance needs, and scalability requirements. Rehosting is fastest and lowest-risk but doesn’t fix architecture problems. Refactoring and replatforming offer a middle ground. Rearchitecting or rebuilding is most disruptive but needed when the current architecture can’t scale no matter how it’s refactored.
How do you modernize a system when there’s no documentation and the original developers are gone?
This is treated as the default case, not the exception. The approach establishes a reliable view of system behavior through direct code and data analysis rather than tribal knowledge, producing reconstructed documentation, architecture maps, and a risk heatmap that becomes the basis for the modernization plan.
How long does application modernization actually take?
Rehosting can typically be done in a few weeks. Refactoring or replatforming generally runs a few months to about six months. Full rearchitecture or cloud-native adoption can take several months to over a year for large, tightly integrated estates. A free codebase assessment provides a project-specific timeline.
What are the biggest risks of legacy modernization, and how are they mitigated?
The top risks are lost business logic, production instability during cutover, and scope creep. These are mitigated through continuous behavior validation against the legacy system, phased rollouts with parallel-running old and new systems, and a clearly scoped assessment with an agreed target architecture upfront.
What legacy technologies does 10decoders modernize?
The core practice covers PowerBuilder, COBOL and mainframe systems, Oracle Forms, Oracle Reports, and Crystal Reports — technologies common in healthcare, financial services, and enterprise back-office systems. Case studies include a HIPAA-aligned clinical platform migration and a monolithic financial platform decoupled into secure APIs.
What does a modernization assessment cost, and what do I get from it?
10decoders offers a free codebase assessment where the client provides read-only codebase access. The deliverables include functional and technical documentation, architecture maps, a risk heatmap, and sample modernized UI screens. A separate architecture review covers target architecture, migration approach, and a phased delivery plan.
