AI-Accelerated Legacy Modernization Services

Modernize business-critical applications faster with AI-assisted engineering, automation, and a risk-controlled delivery approach. Edvantis helps you assess complex legacy estates, reduce technical debt, modernize architecture, data, and user experience, and prepare systems for cloud, platform engineering, and AI adoption without losing valuable business logic.

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Our recognition
top_clutch.co_systems_integration_company_2024 TÜV SÜD ISO 27001 Edvantis
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8.3M subscribers
of legacy applications we modernize
warehouse
warehouse
60% reduction
in infrastructure hosting costs after cloud-native modernization
100M+ data records
migrated from on-premises infrastructure to a cloud environment

Our Legacy Application Modernization Services

Legacy modernization is no longer limited to upgrading frameworks or moving workloads to the cloud. Organizations need secure, observable, API-enabled, and data-ready systems that can evolve quickly, integrate with modern platforms, and support responsible AI adoption. Edvantis combines software engineering, cloud, data, security, and AI-assisted delivery to modernize the right components at the right depth.

We use AI tools where they add practical value, including codebase analysis, dependency discovery, documentation, test generation, refactoring support, and migration planning. Engineers remain responsible for architecture decisions, code review, validation, security, and production readiness.

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Assessment and Modernization Roadmap

Evaluate the application portfolio, source code, dependencies, data flows, security posture, and business criticality. We identify modernization risks and opportunities, compare target-state options, prioritize quick wins and strategic initiatives, and deliver a phased roadmap with effort estimates, dependencies, governance needs, and measurable business and technology outcomes.

AI-Assisted Application Reengineering

Apply AI-assisted engineering to accelerate codebase discovery, dependency mapping, refactoring, and migration planning. We modernize frameworks and libraries, replace obsolete components, improve automated test coverage, and reduce technical debt while engineers retain responsibility for architecture, code review, security validation, performance, and production readiness.
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Architecture and Integration Modernization

Transform tightly coupled and difficult-to-scale systems into modular, API-first, event-driven, or microservices architectures where these approaches provide clear value. We preserve critical business logic, improve resilience, and connect core capabilities with ERP, CRM, cloud services, partner platforms, IoT environments, and modern front ends through secure APIs and integration layers.

Data Modernization and AI Readiness

Migrate, consolidate, and govern fragmented data across legacy databases, applications, and infrastructure. We modernize data pipelines and storage, improve quality, lineage, accessibility, and security, and establish trusted data foundations that support reporting, BI, advanced analytics, machine learning, and responsible generative AI use cases.

Cloud and Platform Modernization

Select the right rehosting, replatforming, refactoring, or rebuilding strategy for each workload across public, private, hybrid, and multi-cloud environments. We introduce containers, managed and serverless services, Infrastructure as Code, automated CI/CD, observability, reliability practices, and platform engineering capabilities to improve scalability, deployment speed, operational control, and cost efficiency.

UX Modernization and Legacy Replacement

Modernize outdated interfaces and user journeys to create accessible, responsive, and consistent experiences across web, mobile, desktop, and embedded channels. When incremental improvement is no longer viable, we support controlled system replacement through custom rebuilds, package adoption, or phased migration, with clear plans for coexistence, data transfer, and business continuity.
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http://it%20consulting

Assessment and Modernization Roadmap

Evaluate the application portfolio, source code, dependencies, data flows, security posture, and business criticality. We identify modernization risks and opportunities, compare target-state options, prioritize quick wins and strategic initiatives, and deliver a phased roadmap with effort estimates, dependencies, governance needs, and measurable business and technology outcomes.

AI-Assisted Application Reengineering

Apply AI-assisted engineering to accelerate codebase discovery, dependency mapping, refactoring, and migration planning. We modernize frameworks and libraries, replace obsolete components, improve automated test coverage, and reduce technical debt while engineers retain responsibility for architecture, code review, security validation, performance, and production readiness.
http://transfer

Architecture and Integration Modernization

Transform tightly coupled and difficult-to-scale systems into modular, API-first, event-driven, or microservices architectures where these approaches provide clear value. We preserve critical business logic, improve resilience, and connect core capabilities with ERP, CRM, cloud services, partner platforms, IoT environments, and modern front ends through secure APIs and integration layers.

Data Modernization and AI Readiness

Migrate, consolidate, and govern fragmented data across legacy databases, applications, and infrastructure. We modernize data pipelines and storage, improve quality, lineage, accessibility, and security, and establish trusted data foundations that support reporting, BI, advanced analytics, machine learning, and responsible generative AI use cases.

Cloud and Platform Modernization

Select the right rehosting, replatforming, refactoring, or rebuilding strategy for each workload across public, private, hybrid, and multi-cloud environments. We introduce containers, managed and serverless services, Infrastructure as Code, automated CI/CD, observability, reliability practices, and platform engineering capabilities to improve scalability, deployment speed, operational control, and cost efficiency.

UX Modernization and Legacy Replacement

Modernize outdated interfaces and user journeys to create accessible, responsive, and consistent experiences across web, mobile, desktop, and embedded channels. When incremental improvement is no longer viable, we support controlled system replacement through custom rebuilds, package adoption, or phased migration, with clear plans for coexistence, data transfer, and business continuity.
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Modernization Challenges We Help Solve

High maintenance costs and shrinking expertise in obsolete technologies
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Slow release cycles caused by tightly coupled architecture and manual delivery processes
Security, compliance, and resilience gaps in unsupported systems
Fragmented data and integrations that block analytics and AI initiatives
Cloud costs or complexity that are not matched by measurable business value
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Limited observability, automated testing, and documentation
Business-critical logic trapped in code that teams cannot safely change
Pressure to modernize quickly without disrupting customers or operations
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Tech Expertise Behind our Legacy Software Modernization Services

We have 21+ years of experience providing full-cycle software engineering services – from business analysis and experience design to software development and ongoing support. Our engineers are well-versed in the latest versions of programming languages and their various frameworks, facilitating a smooth transition from your legacy tech stack to modern architecture. On-demand, we can engage specialists in AI-assisted software development for faster results.

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We have experience working with top cloud providers and related technologies, including Google Cloud, AWS, Oracle, Azure, Snowflake, Firebase, Heroku, Kubernetes, and Docker. Our teams can improve the performance of your cloud applications, manage data workflows in the cloud, migrate from monolith to serverless, and set up efficient development environments – all while following best practices for disaster recovery.

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With 12+ years of experience delivering data science & engineering projects, we can provide you with a 360-degree view of your IT infrastructure. Our Data Science experts can streamline legacy modernization by providing actionable insights, consolidating your business data, and preparing datasets for advanced analytics engineering and AI models. Plus, they can help you with data migration when you rearchitect, rehost, and rebuild your systems and applications. For one of our customers, we migrated and operationalized 100M+ data records from on-premises to an open cloud solution.

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http://ai-chatbot

We can integrate your modernized systems with AI solutions that automate daily operations, forecast industry trends, and streamline your decision-making. We have experience conceptualizing and developing generative & predictive AI solutions, applications with natural language processing, and systems that incorporate deep learning techniques.

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We help embed security and compliance throughout the modernization lifecycle. Our teams can strengthen solution architecture, identity and access controls, vulnerability management, DevSecOps, data protection, and auditability, while supporting alignment with applicable industry standards and regulatory requirements.

Learn more

We have 21+ years of experience providing full-cycle software engineering services – from business analysis and experience design to software development and ongoing support. Our engineers are well-versed in the latest versions of programming languages and their various frameworks, facilitating a smooth transition from your legacy tech stack to modern architecture. On-demand, we can engage specialists in AI-assisted software development for faster results.

Learn more

We have experience working with top cloud providers and related technologies, including Google Cloud, AWS, Oracle, Azure, Snowflake, Firebase, Heroku, Kubernetes, and Docker. Our teams can improve the performance of your cloud applications, manage data workflows in the cloud, migrate from monolith to serverless, and set up efficient development environments – all while following best practices for disaster recovery.

Learn more

With 12+ years of experience delivering data science & engineering projects, we can provide you with a 360-degree view of your IT infrastructure. Our Data Science experts can streamline legacy modernization by providing actionable insights, consolidating your business data, and preparing datasets for advanced analytics engineering and AI models. Plus, they can help you with data migration when you rearchitect, rehost, and rebuild your systems and applications. For one of our customers, we migrated and operationalized 100M+ data records from on-premises to an open cloud solution.

Learn more

We can integrate your modernized systems with AI solutions that automate daily operations, forecast industry trends, and streamline your decision-making. We have experience conceptualizing and developing generative & predictive AI solutions, applications with natural language processing, and systems that incorporate deep learning techniques.

Learn more

We help embed security and compliance throughout the modernization lifecycle. Our teams can strengthen solution architecture, identity and access controls, vulnerability management, DevSecOps, data protection, and auditability, while supporting alignment with applicable industry standards and regulatory requirements.

Learn more

In today’s dynamic digital age, clinging to legacy systems leads to operational inefficiencies, resource drains, and lost opportunities. Modernizing and keeping your IT infrastructure up to date, despite its challenges, is often the only way to ensure a successful today and a prosperous tomorrow for your company. Partner with Edvantis for the strategic planning and execution of legacy modernization project — the one that considers your technology ambitions, core business processes, growth expectations, and market demands.

How Edvantis Modernized Legacy Codebase for a Major German Telecom Provider

The Freenet Group is a leading telecom network provider in Germany, serving 8.3 million customers through its four major brands. Its business-critical applications were built on Java 6 and operated in a JBoss (WildFly) environment that had become increasingly difficult to maintain, scale, and evolve. The aging technology stack created growing technical debt and limited the company’s ability to introduce improvements efficiently while maintaining reliable service for millions of users.

Edvantis assembled a team with expertise in Java 11, Spring Boot, and reactive programming with Mono and Flux. We modernized the applications while preserving critical business logic and minimizing disruption to users.

Together we:

  • Refactored the codebase and improved code quality in Java 11
  • Transitioned 16 services toward a future-ready microservices architecture
  • Replaced legacy libraries and adopted Spring Boot capabilities
  • Expanded code coverage reporting and completed integration testing
Within 12 months, the team migrated and fully ported 16 legacy services to the new technology stack. The controlled modernization preserved service continuity, reduced disruption for customers, and established a more maintainable foundation for future development.

Turn legacy technology into a faster, safer foundation for growth and AI adoption!

How AI Helps Accelerate Modernization

AI accelerates discovery and engineering work without replacing accountable technical decisions. We use it selectively for analysis, knowledge recovery, transformation, and planning, while engineers validate every output through architecture, security, testing, and release controls.

01
Faster system understanding
Summarize complex code, map dependencies and data flows, identify duplicated or obsolete components, and recover knowledge from poorly documented systems.
02
More efficient transformation
Accelerate framework upgrades, code conversion, refactoring, API scaffolding, dependency updates, and migration scripts. Engineers review every output for functionality, maintainability, security, performance, and architectural fit.
03
Stronger test foundations
Generate unit, integration, regression, and edge-case test candidates, identify coverage gaps, and flag areas needing deeper verification. Quality engineers validate expected outcomes and combine automation with security, performance, resilience, and user-acceptance testing.
04
Better documentation
Create and update code explanations, interface specifications, architecture descriptions, migration notes, and runbooks.
05
Continuous engineering support
Support code-review preparation, change summaries, defect analysis, remediation options, and backlog execution. Engineers validate recommendations through established development, security, testing, and approval processes.

Industries We Transformed
with Legacy Modernization Services

There’s no one-size-fits-all legacy modernization strategy. We treat every project as unique in its challenges and potential, selecting and implementing a modernization plan tailored to both your business needs and industry requirements. 

With a proven track record of success stories spanning SMEs to Fortune 500 and Inc. 500 companies, we’ve revolutionized industries worldwide by breathing new life into legacy systems and driving innovation.

http://hi-tech
Software & Hi-tech
http://healthtech
Healthtech
Real Estate
Transportation and Logistics
Public Sector
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Fintech
http://ecommerce
Ecommerce
http://warehouse
Warehousing
http://manufacturing
Manufacturing
http://media
Media & Telecom
http://leisure
Leisure & Hospitality
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Stages of Our Legacy App Modernization Services

Upon your first contact, our engagement managers will get back to you in no less than 1 day. We will schedule a call to better understand your business needs and technology environment. Then the process will go through the following steps.

  • 01
    Assessment

    We inventory systems, dependencies, business processes, data, risks, costs, and operational constraints. Where appropriate, we use automated and AI-assisted analysis to accelerate discovery and build a reliable view of the current environment.

  • 02
    Prioritization

    We classify workloads and select the right path: retain, retire, rehost, replatform, refactor, rearchitect, repurchase, or rebuild. We then define quick wins, target outcomes, priorities, dependencies, and modernization waves.

  • 03
    Solution Design

    We create the target architecture, migration plan, security controls, testing strategy, coexistence model, cutover approach, and delivery backlog. This establishes a practical roadmap for implementation and stakeholder alignment.

  • 04
    Modernization

    We deliver modernization in controlled increments. Our teams automate infrastructure and delivery pipelines, transform code and data, build integrations, and validate functionality, performance, security, and resilience throughout delivery.

  • 05
    Launch and Optimization

    We execute cutover with rollback readiness, stabilize production, transfer knowledge, strengthen observability, and maintain a prioritized improvement backlog. This supports operational continuity and ongoing optimization after launch.

How Our Services Stand Out

Proven Modernization Experience

With 21+ years of software engineering experience, we support modernization initiatives ranging from targeted upgrades and technical-debt reduction to complex, business-critical platform transformations.
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Senior, Cross-Functional Teams

More than 83% of our specialists are at Middle, Senior, Expert, or higher levels. We assemble software, cloud, data, AI, quality, security, and UX capabilities around each modernization challenge.

AI-Accelerated Engineering

We combine engineering automation and AI-assisted workflows with expert review to accelerate discovery, documentation, testing, refactoring, and migration while maintaining quality, security, and accountability.

Long-Term Partnership Value

We adapt delivery models, team composition, and modernization priorities as business and technology needs evolve. This customer-focused approach helps 68% of our clients continue working with us for 5–10+ years.

Security and Compliance by Design

We embed secure architecture, DevSecOps, data protection, auditability, and compliance considerations throughout delivery. Our experience includes alignment with GDPR, ISO/IEC, PCI DSS, HIPAA, and other applicable requirements.
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Proven Modernization Experience

With 21+ years of software engineering experience, we support modernization initiatives ranging from targeted upgrades and technical-debt reduction to complex, business-critical platform transformations.
http://dedicated%20team

Senior, Cross-Functional Teams

More than 83% of our specialists are at Middle, Senior, Expert, or higher levels. We assemble software, cloud, data, AI, quality, security, and UX capabilities around each modernization challenge.

AI-Accelerated Engineering

We combine engineering automation and AI-assisted workflows with expert review to accelerate discovery, documentation, testing, refactoring, and migration while maintaining quality, security, and accountability.

Long-Term Partnership Value

We adapt delivery models, team composition, and modernization priorities as business and technology needs evolve. This customer-focused approach helps 68% of our clients continue working with us for 5–10+ years.

Security and Compliance by Design

We embed secure architecture, DevSecOps, data protection, auditability, and compliance considerations throughout delivery. Our experience includes alignment with GDPR, ISO/IEC, PCI DSS, HIPAA, and other applicable requirements.
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Legacy Modernization Success Stories

What Our Clients Say

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Robert Alvarez
Formerly CFO & COO, BigCommerce
They have a strong work ethic, they were committed to the deliverables, and they took it very seriously.
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Elliott Lander
Managing Director, ATR
The level of communication sets them apart. We’ve had great cooperation through the entire history of our working with them. Our relationship has been highly successful.
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Seth Krauss
CTO and Partner, KPC Labs
Edvantis has been instrumental in most of our key deliverables for the past decade and are the only vendor that has established themselves as a strategic partner.
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Torbjörn Henryson
Business Developer, Modulsystem
Edvantis is always friendly and listens well. We also have good communication with management. We’re happy to partner with them.
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Steve Frey
CEO, Oasis Housing Corporation
We’ve created a good partnership and I try to refer others to them. We haven’t faced any of the pitfalls associated with an overseas team.
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Ronald Wertlen
Former Head of Software Development, Doc Cirrus GmbH
Excellent offering – great developers with great value. They have a friendly company culture that makes a stable team possible over 8 years and counting!
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Juergen Goldmann
CEO, ATRON Systems Sweden AB
Edvantis has been able to cope with our demands in a short time. They’ve raised the right questions, which means they know what they’re talking about.
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Jeff Hotz
President, TESTCo
Edvantis is a PARTNER — not a vendor. I started very early with Edvantis and was impressed with the depth of talent and the individual commitment by the CEO.
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Henrik Schmidt
CTO, SEMDATEX GmbH
Edvantis succeeds where others fail. We were getting nowhere with our previous vendor, and Edvantis turned things around in no time flat.
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Martin Day
CEO, Safety Media Inc.
Their ability to listen carefully to our requirements and to bring top-level development talent, testers, and project managers was very impressive and unique.
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Rob Beauchamp
Co-founder of Tapigo
Edvantis quickly put together a comprehensive, multi-disciplined team and we were defining the initial deliverables within a week of the request.
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Thomas Reimann
Head of Billing & Backend, Freenet Group
Edvantis has intelligent people on board, competent and ready to get the job done. Their professionalism and approach has made for a good experience thus far.
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Tim Nichol
Former VP of Development, Factory Logic
We found them to be credible and highly technically competent. They helped us with all of our features, working alongside our existing engineering team.
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Kent Pickard
CTO, Bluetail
There doesn’t seem to be anything they can’t do. This is extremely valuable to us in our relationship. It feels like a partnership.
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Wolfgang Beeck
CTO, Unicepta GmbH
Everything was delivered on time and with high quality. We successfully migrated to a new database version and architecture.
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Kenneth Nelson
COO, Study Aloud
Edvantis does an excellent job. Their warmth, encouragement, and expertise wrapped in all of one service in an industry that’s traditionally cold.
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Dr. Dominik Holling
Senior Expert DevOps & Continuous X, ITK Engineering GmbH
Edvantis has excellent engineers, which our engineer could learn from (particularly with test framework selection).
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Peter Siciliano
Founder, IMRSV Tools
Adding the Edvantis team was a natural extension for us and they connected right into our existing workflows and communication tools.
Scott Brittain
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Scott Brittain
Former CTO, TrustRadius
It’s hard to find a staffing company that’s willing to deliver a smooth partnership on top of assuring that you always work with high-quality resources.
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Uri Golan
Head of Operations & Finance, Data Security Company
Demonstrated a strong work pace and exceptional dedication, reflected in highly successful outcomes and an outstanding volume of deliverables.

Our Clients on Working With Us

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About Your Project

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    Scott Brittain
    star star star star star
    Scott Brittain
    Former CTO, TrustRadius
    It’s hard to find a staffing company that’s willing to deliver a smooth partnership on top of assuring that you always work with high-quality resources.
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