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Legacy Application Modernization Services

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  • REVIVE YOUR APPLICATIONS

    Transform outdated business apps into agile, cloud-ready, and high-performance solutions. Improve usability, scalability, and maintainability — without starting from scratch.

  • ACCELERATE YOUR BUSINESS

    Replace costly maintenance with rapid innovation. Empower your teams with cutting-edge tools, streamline operations, and stay agile in an ever-evolving market.

  • MAXIMIZE YOUR ROI

    Cut infrastructure costs by up to 50%, reduce time-to-market by 70%, and turn stagnant systems into revenue-generating assets.

Why It Matters

Are you constantly struggling with old burdens? We feel your pain.

You probably know the burden of maintaining outdated systems that eat up budgets, stunt growth, and hold innovation hostage.

Each outdated line of code silently accumulates technical debt. Gartner Research shows that nearly 70% of organizations cite legacy infrastructure as their top barrier to digital transformation, costing millions in hidden operational costs each year.

Are you tired of outdated systems holding you back? Our Re-platforming Solutions are built on deep Application Analysis and strategic Mining of Business Cases, ensuring every change drives real impact. We bake in Scalability from the ground up, so you’re not just modernized — you’re ready for whatever’s next.

When Does it Fit

When Does it Fit

  • Systems Slowing Teams

    Slow response times, sluggish interfaces, and lengthy processes frustrate users and demoralize your developers. When your team spends more time fixing performance issues than developing features, you lose productivity. Modernizing the underlying architecture through code refactoring, database optimization, and infrastructure redesign restores speed and reduces friction.

  • Architecture Blocking Scale

    When every new feature introduces side effects, deployment bottlenecks, or scaling issues, you’re not building on a foundation; you’re tiptoeing around it. Legacy monoliths weren’t designed for today’s volume, complexity, or speed. We help you re-platform and reengineer your system for distributed scalability, real-time processing, and global reach.

  • Crashes Killing Momentum

    When outages impact your customers’ release schedules or SLAs, you’re no longer just doing maintenance — you’re in survival mode. Legacy systems are fragile, hard to monitor, and unpredictable under load. We help you stabilize your stack with proactive root cause analysis, architectural decoupling, and infrastructure-as-code — replacing reactive firefights with technical reliability.

  • Missing Modern Integrations

    Disjointed systems stifle innovation. If you’re working with custom connectors, manual workarounds, or third-party tools that don’t talk to each other, it’s a red flag. We redesign your system with RESTful APIs, event-driven integrations, and microservices to create interoperability so that your product works seamlessly with all modern SaaS tools and cloud-native services.

  • Costs Rising, Value Flat

    If your operating costs exceed your business's growth, it’s time to reevaluate the situation. Outdated systems require excessive resources just to stay online: expensive servers, outdated licenses, and manual implementations. We help you replace sunk costs with scalable value by leveraging cloud migration, serverless infrastructures, and containerized deployments — so every dollar drives results.

  • Security Risks Growing

    Outdated stacks silently accumulate risk. Outdated encryption, hard-coded secrets, and unsupported libraries add to a ticking time bomb. Whether you want to comply with regulatory requirements or sleep better at night, our security-conscious modernization strategies reduce attack surfaces, enforce least privilege, and integrate zero trust models directly into your infrastructure.

  • Data Scattered and Siloed

    Your team shouldn’t spend hours reconciling spreadsheets or manually gleaning insights from fragmented databases. Legacy systems often lock valuable data in isolated silos. Through ETL pipelines, schema modernization, and cloud-native analytics, we help you make data visible in real time and facilitate decision-making across your organization.

  • Developers Avoiding Your Stack

    Developers avoid legacy technologies like the plague. If your technology stack is a mix of VB6, WCF, or proprietary code that no one wants to touch, recruitment is more problematic, onboarding is slower, and innovation suffers. We modernize your stack with mainstream languages and frameworks that attract top talent, shorten onboarding time, and future-proof your development organization.

  • Competitors Move Faster

    Markets move fast. If you’re stuck in a six-week release cycle while your competitors are iterating weekly, you’re losing competitive advantage. We integrate automated CI/CD, testing frameworks, and infrastructure automation to shorten your time-to-market, so you don’t just catch up; you get ahead.

What We Offer

Legacy Application Modernization Services We Provide

  • Enterprise App Modernization Consulting

    Free yourself from legacy bottlenecks.

    Legacy systems consume up to 75% of companies’ IT budgets and keep companies trapped in a cycle of inefficiency. Maintaining outdated applications means wasting the risk of security breaches. But without a clear modernization roadmap, your team constantly faces unclear priorities.

    With our enterprise legacy application modernization consulting, you’ll be able to define, prioritize, and execute your modernization strategy clearly:

    • Application portfolio analysis. We thoroughly assess existing systems to determine what should be migrated, decommissioned, or transformed.
    • Technical backlog assessment. We identify obsolete technologies, hidden vulnerabilities, and costly dependencies.
    • Tailored migration roadmap. We develop a clear, actionable strategy — choosing between rehosting, re-platforming, refactoring, or replacing legacy systems — tailored to your business needs and technical realities.
    • Cost-benefit analysis. We calculate the true cost of retaining legacy systems versus modernization, giving you the clarity you need.
    • Performance auditing. We conduct thorough audits to identify performance bottlenecks, improve maintainability, and ensure your modernized systems scale smoothly with your business.

    Turn complexity into clarity with our legacy-free application modernization services.

  • Legacy Application Migration

    Make your move.

    A successful migration requires more than just the transfer of code — it requires strategic decoupling, in-depth refactoring, and a realignment of the architecture. We help organizations break out of rigid legacy ecosystems:

    • Architecture Audit & Readiness. We conduct a thorough diagnosis of existing systems, uncovering undocumented dependencies, outdated libraries, and business-critical modules that need special attention during the transition.
    • Security-hardened blueprint. Based on the audit, we develop a phased migration strategy, addressing thread retention issues in legacy applications.
    • Code base optimization. We refactor monolithic code bases (Java, .NET Framework, VB6, Delphi) into clean, modular architectures. Our team replaces legacy communication protocols (e.g. WCF) with scalable APIs using gRPC, REST or SignalR.
    • Platform change & integration. We migrate systems to modern environments — from on-premise to cloud or hybrid — and enable real-time data exchange via secure APIs, middleware connectors and event-driven integrations.
    • Data fidelity & cleansing. Business-critical data is migrated using robust ETL pipelines (Apache NiFi, Talend, DBT) that ensure schema matching, referential integrity and deduplication across structured and unstructured data sets.

    Legacy systems rarely fail loudly — they erode quietly. By redesigning what’s under the surface, we don’t just migrate — we rewire your tech foundation to ensure speed, resilience, and growth.

  • Cloud Modernization Services

    Modernize to lead.

    Our cloud modernization services enhance migrated applications through re-engineering, performance optimization, and native service integration:

    • Redesigning the cloud-native architecture. We transform legacy applications into microservices and containerized components (Docker, Kubernetes) that enable independent deployment, fault isolation, and elastic scaling under load.
    • Advanced service enablement. We integrate your systems with AWS Lambda, Azure Functions, App Engine, or Elastic Beanstalk and replace bloated services with event-driven, lightweight and cost-effective components.
    • Performance engineering. Using distributed tracing, APM tools and load simulations, we identify memory leaks, blocking I/O, cold starts or latency spikes,  and eliminate them.
    • DevOps automation & IaC. We set up complete CI/CD pipelines (GitHub Actions, GitLab CI/CD, Jenkins) and code environments with Terraform or Pulumi for consistent deployments and fast rollback functions.
    • Compliance & observability. We integrate monitoring, alerting and compliance layers into your cloud infrastructure and use tools such as Prometheus, Grafana, AWS CloudWatch and Azure Monitor to ensure SLAs.

    Maximize the potential of your cloud investment by transforming legacy assets into cloud-optimized solutions that can keep pace with the evolution of your business.

  • Data Modernization Services

    Unlock the power of your data.

    Legacy databases are more than outdated, holding your business hostage. Yesterday’s data architecture can’t support tomorrow’s goals.

    We modernize every layer of your legacy data systems, from infrastructure and architecture to pipelines and compliance:

    • Legacy Database Migration. We migrate legacy systems such as Oracle, DB2, Informix, and SQL Server to modern, cloud-native databases, including PostgreSQL, MongoDB, Azure SQL, and Cosmos DB. Our approach ensures data integrity, zero downtime (where possible), and minimal operational risk.
    • Cloud-Based Data Architecture Design. We re-architect your data systems to fully leverage cloud-native storage, computing, and processing, whether it’s through AWS RDS, Google BigQuery, or Azure Synapse.
    • ETL / ELT Optimization & Automation. We modernize legacy ETL pipelines with Apache NiFi, Talend, Airbyte, and dbt, ensuring fast, automated, and auditable data flows. This increases data accuracy across your entire ecosystem.
    • Data Governance & Compliance Readiness. We integrate modern data governance into your stack with lineage, access controls, encryption, and role-based rules so that you are always audit-proof and compliant.
    • Real-Time Data Processing & Analytics. We transform static reporting into real-time decision-making. We help you implement streaming architectures with Kafka, Spark Streaming, or Azure Event Hubs, and integrate analytics dashboards powered by Power BI, Looker, or Tableau for instant insights.

    We are turning your legacy data infrastructure into a future-ready powerhouse. Your data is your most valuable asset.

  • AI/ML Implementation

    Transform your legacy code — supercharged with AI!

    Manual code upgrades and routine maintenance drain your resources. To free up your team, we integrate cutting-edge AI and automation tools to modernize your legacy code base:

    • AI-powered code refactoring. We leverage advanced machine learning tools like GitHub Copilot and Tabnine to quickly transform legacy code into modern, maintainable frameworks.
    • Automated documentation & reverse engineering. Our custom LLM-based agents extract undocumented logic, generate accurate technical documentation and support system understanding.
    • Legacy data modeling with ML pipelines. We implement ML models to enrich legacy data, enabling anomaly detection, intelligent pattern recognition, and decision-making based on previously underutilized data sets.
    • Predictive fault detection and correction. Using AI-driven observation tools, we proactively detect performance bottlenecks, memory leaks, and potential failures in large legacy systems.
    • AI-driven test creation and regression validation. We automate the creation of test cases and regression scripts using AI tools trained on the behavior of legacy systems. This allows us to increase test coverage and accelerate release cycles without manual QA effort.

    Stop wasting valuable time managing outdated systems. Let AI-driven automation and expert legacy application modernization services transform your codebase, streamline your workflows, and position your team for breakthrough efficiency.

  • UI/UX Modernization

    Bring old applications back to life with breathtaking user experiences

    An outdated user interface can reduce productivity by up to 40% and frustrate users who expect smooth, intuitive experiences. Devox Software transforms your outdated application interfaces into sleek, modern digital experiences:

    • Front-end redesign to SPA. We modernize old desktop or legacy web interfaces by migrating to leading front-end frameworks (React.js, Vue.js, Angular) to enable lightning-fast interactions.
    • Progressive Web App (PWA) implementation. We convert outdated, slow-loading web applications into state-of-the-art PWAs with mobile-friendly offline capabilities.
    • Accessibility and compliance improvements. We ensure your updated applications meet rigorous standards (WCAG, ADA compliance) so your systems avoid costly compliance pitfalls.
    • Optimize performance. We apply advanced optimization techniques to achieve faster load times across all devices and platforms.
    • Seamless user experience (UX) design. We leverage user-centric methods to simplify navigation and design intuitive user interfaces that drive user satisfaction.

    Transform outdated applications into engaging online experiences. By using our software modernization services, you will position your company for sustainable digital excellence.

  • Code Refactoring

    Speed up development, minimize headaches.

    We expertly transform your outdated, convoluted codebases into clean, maintainable, and scalable solutions:

    • Analyze and reduce technical debt. We systematically identify and eliminate outdated patterns, dependencies, and vulnerabilities that are hidden roadblocks.
    • Legacy code optimization. We improve code readability and maintainability without changing core business logic, making your system easier to update, debug, and extend.
    • Performance and stability improvements. We improve the responsiveness, speed and reliability of your system by refining inefficient algorithms.
    • Code base modernization. We convert legacy applications from outdated languages and platforms (such as VB6, Delphi, COBOL, outdated Java and .NET versions) to modern, efficient programming stacks.
    • Improved test coverage & CI/CD integration. We integrate robust testing strategies with JUnit, Selenium, Cypress, and Postman while automating deployment via CI/CD pipelines (Jenkins, GitHub Actions, GitLab CI/CD) to accelerate feature delivery.

    Reduce complexity, improve clarity, and accelerate innovation.

  • API Extension & Integration

    Bridge the gap.

    Unconnected legacy systems cause operational friction, slow business processes, and limit agility.  Our team specializes in strategic API development, building robust, secure REST APIs that seamlessly integrate legacy applications into modern technology ecosystems without the need to replace the entire architecture:

    • Legacy System API Wrapping. We expose critical legacy business logic through secure RESTful APIs to expose hidden functionality.
    • Implement microservices and API gateways. We transform monolithic systems into agile microservices architectures by leveraging Spring Trunk, .NET Core, and Node.js to increase scalability and resilience.
    • Integrate with modern SaaS solutions. To reduce integration complexity, we facilitate seamless connections between legacy applications and third-party SaaS platforms (Azure API Management, AWS API Gateway).
    • Enable event-driven architectures. To optimize data flow, we leverage Azure Service Bus, Event Grid, Kafka, or RabbitMQ to create responsive, decoupled systems.
    • Secure and scalable API infrastructure. We design and implement API solutions that are compliant with industry security standards (OAuth2, JWT) to ensure solid protection of sensitive business data.

    Unleash innovation, increase agility, and empower your teams.

Our Approach

Modernization Strategies that We Follow

We take a close look at your legacy applications and assess every component, dependency and risk factor. By understanding your business goals, we ensure that the modernization is tailored to your exact needs.

01.

01. Define the Modernization Goals

Based on your strategic priorities, we define clear legacy app modernization goals.

02.

02. Evaluate & Prioritize Applications

We carefully review your existing application ecosystem and categorize each application by modernization urgency.

03.

03. Identify Technical Debt and Vulnerabilities

Using advanced assessment tools and best practices, we identify technical debt, outdated dependencies, and architectural vulnerabilities that impact performance, scalability, and security.

04.

04. Designing an Optimized Architecture

We evaluate your existing systems and define a high-level target architecture that fits your long-term strategy. This includes selecting optimal platforms (.NET 8, Kubernetes, serverless), decoupling legacy components, and planning the transition to scalable, cloud-native environments (AWS, Azure, GCP).

05.

05. Deliver a Modernization Roadmap

We provide a clear, phased legacy modernisation roadmap that details each step from initial migration to full production deployment. With measurable milestones, resource allocation, and contingency plans, the transition to your legacy system will be predictable and effective.

  • 01. Define the Modernization Goals

  • 02. Evaluate & Prioritize Applications

  • 03. Identify Technical Debt and Vulnerabilities

  • 04. Designing an Optimized Architecture

  • 05. Deliver a Modernization Roadmap

Value We Provide

Why Choose Us as a Legacy Modernization Partner

01

Legacy-to-Cloud Championship

We specialize in seamlessly migrating legacy applications to modern cloud environments and have deep expertise in AWS, Azure, and Google Cloud. Our precise cloud migration strategies reduce infrastructure costs by up to 35% and improve your application's scalability, resilience, and performance. With proven frameworks and hands-on experience in migrating complex enterprise infrastructures, we minimize downtime and maximize long-term ROI.

02

Future-Proof Technology Stack

Devox Software transforms legacy technology stacks with targeted, future-proof upgrades — from outdated .NET Framework and monolithic WCF services to agile, high-performance .NET 8 solutions that leverage gRPC, REST APIs, and SignalR for real-time responsiveness. We systematically eliminate legacy technologies, reduce technical debt and simplify code management. With expertly integrated CI/CD pipelines, your team will achieve up to 50% faster deployment cycles.

03

Advanced DevOps & Automation Capabilities

We integrate advanced DevOps practices and AI-driven automation into your modernization roadmap by leveraging Kubernetes, Infrastructure as Code (IaC), and serverless computing (AWS Lambda, Azure Functions) to reduce infrastructure deployment times by over 70%. By integrating automated testing and intelligent CI/CD pipelines into existing workflows, we significantly reduce manual intervention and improve software quality.

Case Studies

Our Latest Works

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Testimonials

Testimonials

Sweden

The solutions they’re providing is helping our business run more smoothly. We’ve been able to make quick developments with them, meeting our product vision within the timeline we set up. Listen to them because they can give strong advice about how to build good products.

Carl-Fredrik Linné
Tech Lead at CURE Media
Darrin Lipscomb
United States

We are a software startup and using Devox allowed us to get an MVP to market faster and less cost than trying to build and fund an R&D team initially. Communication was excellent with Devox. This is a top notch firm.

Darrin Lipscomb
CEO, Founder at Ferretly
Daniel Bertuccio
Australia

Their level of understanding, detail, and work ethic was great. We had 2 designers, 2 developers, PM and QA specialist. I am extremely satisfied with the end deliverables. Devox Software was always on time during the process.

Daniel Bertuccio
Marketing Manager at Eurolinx
Australia

We get great satisfaction working with them. They help us produce a product we’re happy with as co-founders. The feedback we got from customers was really great, too. Customers get what we do and we feel like we’re really reaching our target market.

Trent Allan
CTO, Co-founder at Active Place
United Kingdom

I’m blown up with the level of professionalism that’s been shown, as well as the welcoming nature and the social aspects. Devox Software is really on the ball technically.

Andy Morrey
Managing Director at Magma Trading
Vadim Ivanenko
Switzerland

Great job! We met the deadlines and brought happiness to our customers. Communication was perfect. Quick response. No problems with anything during the project. Their experienced team and perfect communication offer the best mix of quality and rates.

Vadim Ivanenko
Jason_Leffakis
United States

The project continues to be a success. As an early-stage company, we're continuously iterating to find product success. Devox has been quick and effective at iterating alongside us. I'm happy with the team, their responsiveness, and their output.

Jason Leffakis
Founder, CEO at Function4
Sweden

We hired the Devox team for a complicated (unusual interaction) UX/UI assignment. The team managed the project well both for initial time estimates and also weekly follow-ups throughout delivery. Overall, efficient work with a nice professional team.

John Boman
Product Manager at Lexplore
Tomas Pataky
Canada

Their intuition about the product and their willingness to try new approaches and show them to our team as alternatives to our set course were impressive. The Devox team makes it incredibly easy to work with, and their ability to manage our team and set expectations was outstanding.

Tamas Pataky
Head of Product at Stromcore
Stan Sadokov
Estonia

Devox is a team of exepctional talent and responsible executives. All of the talent we outstaffed from the company were experts in their fields and delivered quality work. They also take full ownership to what they deliver to you. If you work with Devox you will get actual results and you can rest assured that the result will procude value.

Stan Sadokov
Product Lead at Multilogin
United Kingdom

The work that the team has done on our project has been nothing short of incredible – it has surpassed all expectations I had and really is something I could only have dreamt of finding. Team is hard working, dedicated, personable and passionate. I have worked with people literally all over the world both in business and as freelancer, and people from Devox Software are 1 in a million.

Mark Lamb
Technical Director at M3 Network Limited
FAQ

Frequently Asked Questions

  • Our legacy systems are still delivering results — why is modernization so important right now?

    Even if legacy systems currently meet basic operational requirements, they are quietly accumulating significant risks under the surface, including growing technical debt, outdated security practices, and inefficiencies. By proactively modernizing, you can mitigate these underlying issues before they become critical failures.

  • How quickly can we expect a tangible ROI from a modernization initiative?

    Companies typically notice tangible financial and operational benefits within 3 to 6 months of beginning modernization. Immediate benefits often include lower infrastructure costs, improved application performance, and reduced maintenance costs. The full ROI, which provides for increased scalability, faster time to market, reduced downtime, and long-term savings, is typically realized within 12 to 18 months and increases significantly over time.

  • Can you justify the upfront costs of migrating legacy systems to the cloud?

    Absolutely. Cloud migrations can immediately reduce infrastructure costs by up to 35%, dramatically reduce hardware maintenance costs, and eliminate the risks associated with outdated on-premise equipment. In addition, the flexibility of scalable resources means you avoid overspending on unused resources. Over time, this leads to significant financial benefits that clearly justify the initial investment.

  • How can you ensure that the migration of our legacy applications does not disrupt ongoing operations?

    A structured, step-by-step approach avoids disruption. Each migration phase undergoes rigorous planning, testing, and validation prior to implementation. Running the systems in parallel ensures uninterrupted business processes, while proactive monitoring identifies and fixes problems before they impact operations. This method makes it possible to push ahead with modernization without compromising productivity.

  • How can you ensure the integrity of our data throughout the migration process?

    The integrity of your data is our top priority every step of the way. We use advanced automated migration tools complemented by manual review and real-time monitoring to ensure consistent and accurate data transfer. After migration, rigorous validation checks and robust backup systems ensure that the integrity and security of your sensitive data are maintained throughout the modernization process.

  • How do you ensure that compliance standards are not lost during the modernization project?

    Compliance is deeply embedded in our modernization approach. Our process strictly adheres to globally recognized frameworks such as ISO 27001, GDPR, HIPAA, and industry-specific regulations.

  • Won’t migrating our legacy applications to the cloud create additional security gaps?

    Rather, when done professionally, migrating to the cloud increases security. We incorporate rigorous identity and access management procedures, multi-factor authentication, robust encryption standards, zero trust architectures and continuous monitoring tools.

  • How much retraining will our IT team realistically need after modernization?

    Thanks to user-friendly legacy systems modernization approaches designed to leverage your team’s existing skills, retraining needs are minimal. We provide comprehensive, hands-on training tailored specifically to your staff’s needs, accompanied by clear documentation, ongoing expert support, and knowledge transfer programs.

  • Why should we choose Devox Software for our legacy modernization initiatives?

    Devox Software uniquely combines deep technical expertise in legacy-to-cloud migrations, targeted application modernization solutions tailored to your needs, proactive risk management, and rigorous adherence to compliance requirements. Our transparent, consultative approach combined with a strong track record of delivering complex enterprise modernization projects makes us a trusted strategic partner, ensuring your modernization project is delivered with precision, minimal disruption, and long-term success.

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