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App modernization assessment: transform your legacy monoliths into cloud-native assets

We categorize your applications using the "5 R's" model to determine the optimal path: Rehost, Refactor, or Rearchitect.

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The challenge:
the "legacy trap"

Is your "legacy" application slowing down your entire business? We solve the paralysis caused by technical debt:

The "fear of deployment"

Is your team afraid to touch the code because the monolith breaks unexpectedly? High coupling is killing your release velocity.

Talent drain

Are you struggling to hire developers because no one wants to work with outdated frameworks?

Scalability bottlenecks

Does your application crash during peak traffic because it can't scale horizontally?

Cost inefficiency

Are you paying for massive VMs to host an application that only needs a fraction of the power?

Security rot

Are you running on end-of-life versions of .NET or Java that are no longer supported?

The 5 R's model: choosing the right strategy

We strictly follow the Gartner-standard migration model to ensure you don't overspend on complexity you don't need.
We find your "R" among the standard strategies:

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01

Rehost (lift & shift)

Best for rapid data center exits. We move apps to Azure VMs with zero code changes.
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02

Refactor (repackage)

Best for apps with healthy code. We optimize them for AKS (containers) or App Service (PaaS).
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03

Rearchitect (redesign)

Best for monoliths that need agility. We break components into microservices.
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04

Rebuild (rewrite)

Best when technical debt is too high. We develop from scratch using cloud-native standards.
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05

Replace (drop)

Best for commodity functions. We retire custom code in favor of SaaS (e.g., Dynamics 365).

How it works: our methodology

We don't guess; we analyze. We apply a scientific approach to categorize every workload in your portfolio.

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01

Automated code scanning

We use advanced static analysis tools to assess technical debt and dependency chains in your .NET or Java codebase. We identify hard-coded configurations and libraries that are incompatible with the cloud.

02

The "5 R" categorization

We classify your application into the optimal path (Rehost, Refactor, Rearchitect, Rebuild, or Replace) based on code health and business value.

03

Target architecture selection

We recommend the destination that fits your budget:
  • IaaS (Virtual Machines): For apps that need OS control.
  • PaaS (Azure App Service): For standard web apps requiring low maintenance.
  • Cloud-native (AKS/Containers): For complex, scalable systems.

Technology stack: we speak your code's language

This specific capability proves we are developers, not just infrastructure consultants.

Languages

Deep static analysis for .NET (Framework 4.x, Core) and Java (Spring, EE) applications.

Databases

Migration paths for SQL Server, Oracle, and MySQL into Azure SQL Managed Instances.

Assessment tooling

We utilize enterprise-grade scanners to visualize dependency chains and hard-coded "blockers".
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The hidden cost of maintaining the status quo

Keeping a "legacy" monolith alive is not free. Our assessment quantifies these hidden drains on your budget:

  • Security vulnerabilities: End-of-life frameworks are open doors for cyberattacks.
  • Lost opportunity costs: How many features didn't you ship this year because the deployment process takes 3 days?
  • Infrastructure bloat: "Monoliths" require large, expensive VMs. Modernizing to containers often allows you to run the same workload on 40% less infrastructure.

Deliverables: your modernization roadmap

We provide tangible outputs that justify the investment to both technical and business stakeholders.

Deliverable

Value for Client

The 5 R's classification

A definitive categorization of every app, identifying "quick wins" vs. "long-term projects".

Architecture recommendation

Specific decision matrix: migrate to Virtual Machines (IaaS), Containers (AKS), or App Service (PaaS).

Migration business plan

A TCO (total cost of ownership) comparison: current on-prem costs vs. estimated cloud costs to support the CFO's decision.

Code health scorecard

Identification of technical debt and specific code blockers (e.g., hardcoded IPs) that developers must fix.

Professnet is officially certified for: ISO 27001

ISO certifications reflect our focus on delivering reliable and secure technology services.
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Tier-1 Partner

Direct collaboration with Microsoft engineers

16 Years

Experience in system design

ISO 27001

Certified information security

< 15 min

Critical incident response time (SLA)

Engagement timeline: from "black box" to roadmap in 3 weeks

Week 1

Discovery & scanning

We install our non-invasive agents to scan your codebase and map dependencies.

Week 2

Analysis & workshops

Our architects review the data and interview your technical leads to understand business context.

Week 3

Strategy & presentation

We deliver the 5 R’s map, the business plan, and the migration roadmap.

Why partner with us?

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Dev-centric DNA

We understand code. We are not just infrastructure consultants; we are software engineers who know the intricacies of .NET and Java.

Pragmatic approach

We don't push for a "rewrite" unless it's necessary. We value ROI and often find that "refactoring" offers the best balance.

Microsoft specialists

Deep expertise in Azure App Service, Azure Kubernetes Service (AKS), and Container Registry.

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What our customers say about us

Their professionalism, reliability, and commitment to each project ensure that every collaboration runs smoothly and efficiently. I wholeheartedly recommend Professnet as a solid and competent business partner.

Mariusz Duczek

Managing Director @ SCHURTER

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Thanks to their skills in system integration and technological consulting, we have significantly improved our operational processes. Projects are executed not only on time but with the utmost care.

Jarosław Sojewski

Managing Director @ FOMAR Friction

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The professionalism of the team, their quick response to our needs, and in-depth analysis have enabled us to optimize our cloud environment and enhance its security. We confidently recommend Professnet as a solid technology partner.

Maciej Kromkowski

Board Member @ Power21

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Case studies

From Local Server Room to Global Cloud

How abcgo.pl Reduced Costs by 40% and Secured Client Financial Data.

ERP System:

enova365

Technologies:

Microsoft Azure, Azure Virtual Desktop (AVD), SQL Database

Key Achievement:

40% OPEX Reduction
Read more
hero-administracja-serwerami
hero-m365
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Building a resilient security architecture

How KZBS secured the ecosystem of 500+ cooperative banks against modern threats.

Sector:

Banking / Public Trust

Scale:

500+ Associated Banks

Key Compliance:

NIS2, DORA, GDPR, ISO 27001
Read more

FAQ

Rarely. The goal of the 5 R's is to find the path of least resistance. Often, a "refactor" (containerizing the existing app) or "rehost" is sufficient to gain stability without the cost of a full rewrite.

This is the most common challenge. Our assessment includes a database migration strategy, exploring options like Azure SQL Managed Instance (which offers near 100% compatibility) to modernize the DB without breaking the code.

Yes. If your goal is Kubernetes, we specifically look for "blockers" in your code (like local file storage or session state issues) that need to be fixed before containerization is possible.

We specialize in .NET and Java ecosystems, but we can also assess Node.js, PHP, and Python environments.

Technology Partners

cisco
citrix
dell
eset
fortinet
fujitsu
hpe
huawei
jabra
lenovo
manage-engine
microsoft
oracle
palo-alto
redhat
symantec
trend-micro
vmware
xerox
cisco
citrix
dell
eset
fortinet
fujitsu
hpe
huawei
jabra
lenovo
manage-engine
microsoft
oracle
palo-alto
redhat
symantec
trend-micro
vmware
xerox
cisco
citrix
dell
eset
fortinet
fujitsu
hpe
huawei
jabra
lenovo
manage-engine
microsoft
oracle
palo-alto
redhat
symantec
trend-micro
vmware
xerox
cisco
citrix
dell
eset
fortinet
fujitsu
hpe
huawei
jabra
lenovo
manage-engine
microsoft
oracle
palo-alto
redhat
symantec
trend-micro
vmware
xerox
cisco
citrix
dell
eset
fortinet
fujitsu
hpe
huawei
jabra
lenovo
manage-engine
microsoft
oracle
palo-alto
redhat
symantec
trend-micro
vmware
xerox
cisco
citrix
dell
eset
fortinet
fujitsu
hpe
huawei
jabra
lenovo
manage-engine
microsoft
oracle
palo-alto
redhat
symantec
trend-micro
vmware
xerox

We are always happy to talk

Reach out to us about a project, consultation, or to explore other collaboration opportunities.

portrait Lukasz Tabaczek

Lukasz Tabaczek

CEO
professnet@professnet.pl
+48 516 524 227
Schedule a meeting
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Elektronowa 2d (4 floor)
03-219 Warsaw
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VAT ID: PL 5242 793 610

Cloud & Infrastructure:

Migration & Repatriation Azure Landing Zone Secure Connectivity Intune & Device Management

Apps, Data & AI:

App Modernization Factory Serverless & Event-Driven Azure DevOps & IaC Private RAG (GenAI)

Security & Compliance:

Managed SOC Identity & Entra ID DevSecOps (SSDLC) Security Consulting

Managed Services:

Managed Infra (24/7) Co-Managed Azure Managed Compute (VMs) Data Lifecycle & Archive

Assessments:

Azure 3D Assessment NIS2 & DORA Audit AI Readiness Check App Mod. Assessment AKS Health Check

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