As a legacy modernization company, GP Solutions uses a range of strategies to rejuvenate your tech stack, depending on your specific needs:
The aim is clear: our experts will help you untangle technical debt and retain the business value you’ve been accumulating all these years. We do not “just fix the old”. Our legacy system modernization services are about investing in a future that unlocks cloud adoption, drives ongoing innovations, and maintains your long-term competitiveness in a digital-first world.
Teams that approach our legacy system modernization company already know something is wrong.
They just don’t know how wrong or where to start.
GP Solutions provides full-cycle legacy modernization services — from initial architecture assessment all the way to post-deployment support. The scope will be determined solely by the need of your system.
Our consulting services include:
From those findings, we proceed to devising your modernization plan: phased, sequenced, costed, and focused on business continuity. It normally covers:
The strategy belongs to you. If you choose us as your legacy modernization partner, we follow it. Otherwise, you’re still left with something that’s worth having.
With deep technical heritage and cutting-edge capabilities, GP Solutions can modernize systems from any era. From legacy infrastructure with decades of logic to an early-generation cloud deployment, we transform:
COBOL systems, in particular mainframes, Natural, Adabas, JCL, CICS, and DB2.
Monolithic applications, control card-based systems, and cloud-based legacy applications.
Legacy ERP systems, CMS platforms, and highly regulated systems.
Legacy desktop applications, web applications, and mobile applications.
You can witness a visible result of each phase of our legacy system modernization services prior to the start of the next phase.
We determine what there is before offering suggestions as to what to do with it.
All decisions (sequencing, technology, cost, risk) are taken prior to execution.
Structured delivery phases. Nothing moves forward without validation.
System activation. The team is ready. Monitoring is in progress.
Changes are not over after launch. Our involvement is not either.
As an experienced legacy system modernization company, GP Solutions applies the best practices for quality assurance throughout the project lifecycle:
Though having an established team of their own, the client looked for improvements in architecture design, development process coordination, and the roll-out process for new modules and updates. Check how we positively impacted the release of market versions of the client’s e-commerce platform.
Learn what we did for our German client to redesign Android and iOS mobile apps and improve user experience. In the end, app users got a better search functionality, were able to use apps on more external devices, and enjoyed the overall smooth experience when using the client’s apps.
Learn how the GP team improved the older version of the client’s system and developed a new CRM solution extended with e-commerce and customer loyalty functionality. The back office we upgraded now operates to distribute and service Visa and MasterCard offers.
We future-proof your technical foundation by upgrading your system with cloud hosting, scalable microservices, abstraction, and complete modernization of digital cores.
Empower your current assets with seamless communication and data flow through API-first modernization, complete data modernization, and ERP extensibility.
Simplify deployment pipelines and infrastructure to meet the task at hand with targeted infrastructure, network, and DevOps modernization.
Make sure your systems are fast, simple to use, and secure with comprehensive security modernization, deep performance optimization, and user-friendly UI/UX redesign.
Working with an undocumented or high-risk legacy system?
Documentation recovery and risk mapping are built into our process. Tell us what you’re dealing with.
When we choose technology for your project, we follow architecture requirements and business goals. The stack serves the system. Not the other way around.
At our legacy modernization company, engineers are always open to new opportunities that can make our job better and faster. Our team will be happy to extend our services with AI development and integration capabilities.
GP Solutions integrates AI-powered tooling into its modernization workflows:
Automated code analysis’
With GP Solutions, you get engineering, product, and UX design services from the same roadmap. From the outset the people making architecture decisions and the people designing the experience your business will operate in are in the same conversation.
We maintain your existing functional business logic. For systems that have been in existence for many decades, that logic is the most important part of the codebase, even if the rest of the code is not.
Not technology preference. Not vendor relationships. But what the system should be doing in three years. This distinction matters most where a technically elegant solution and a business-appropriate solution diverge.
Many legacy modernization efforts fail, and not just because of technical issues. GP Solutions fits into your existing structure, aligning with teams, speaking in your language, and working around your schedule.
Phased application modernization minimizes risk in each phase. The business continues to operate as the system develops. We clearly define, check, and approve each phase prior to the start of the next one. We never take a leap for a direction that we haven’t previously substantiated with evidence.
GP Solutions has seen firsthand how a modernization failure can be a regulatory disaster or a seven-figure outage in banking systems, insurance infrastructure, and healthcare systems.
Most teams already have a shortlist of systems they’re worried about. We start there.
Legacy modernization is a decision-making process as much as an engineering one. Most organizations know their legacy system is slowing them down. They don’t know which parts are worth saving and which are costing more than they’re worth. Modernization answers that question with evidence, then acts on it. The outcome is a system that fits how the business operates today, built on what was already working underneath.
We treat it as a starting condition. It is not a blocker for our team. The first thing we do is the reconstruction of what’s there: through code analysis, dependency tracing, and conversations with the people who’ve been keeping the system alive. By the time modernization work begins, the system is understood. Often better than it was before we arrived.
Full replacement is the last option we reach for, not the first. Most systems contain years of accumulated business logic that a rewrite would have to rediscover from scratch and at significant cost and risk. The question is always whether transformation or targeted rebuilding can achieve the same result with less disruption. Usually it can.
Every roadmap includes a business continuity plan. Work is sequenced to minimize operational exposure. Parallel systems are maintained where risk requires it. We validate each phase before the next begins. The business doesn’t pause for modernization — the modernization is designed around the business.
Scope, complexity, and approach determine cost. This is why we don’t provide estimates before the audit. A number built on assumptions about what legacy systems typically look like isn’t an estimate. It’s a guess with a decimal point. Detailed, defensible cost figures come after we’ve seen what we’re dealing with in practice.
Rarely for technical reasons. The most common causes are organizational: poor planning, underestimated system complexity, insufficient risk mapping, and teams without direct experience in legacy environments. The audit addresses the first three. The fourth is where GP Solutions’ 20 years of working inside complex, underdocumented, business-critical systems are the deciding factor.
It depends on system complexity, the approach selected, and how much change the organization can absorb at each phase. Rehosting can be completed in weeks. Full rearchitecting or rebuilding engagements for complex enterprise systems span months. We deliver them in defined phases, each producing a validated output before the next begins. Timeline estimates are part of the roadmap developed after the initial audit.
Web Apps 
Mobile Apps 
Enterprise Software 
Cloud Apps 
MVP Development 
UI/UX Design 
Shopify 
Business Intelligence 
Data Analytics 
AI 
Claude Code 
Legacy Modernization 
IT Consulting 
