Application Modernization Services

Your system still runs the business, but every change is slow, risky and expensive. We turn it into the platform you need, step by step: audit what you have, carve out services one by one, migrate data with a parallel run, and keep production online throughout.

Application modernization and legacy system upgrade

Modernization Services

Legacy System Assessment

Know exactly what you are dealing with before you commit budget.

  • Codebase, dependency and infrastructure audit
  • Business-critical flow and data mapping
  • Technical debt and risk scoring
  • Modernization roadmap with phased estimate
Order an assessment

Architecture Re-engineering

Break the monolith apart along business boundaries, not all at once.

  • Domain analysis and service boundaries
  • Strangler-pattern decomposition
  • API layer in front of legacy modules
  • Event-driven integration between old and new
Redesign the architecture

Cloud Re-platforming

Move from aging servers to managed, observable cloud infrastructure.

  • Lift-and-optimize or full re-platforming
  • Containerization and infrastructure as code
  • CI/CD and automated rollback
  • Post-migration optimization
Plan a cloud move

Data Layer Modernization

Move data to modern stores without losing it or stopping the business.

  • Database upgrade and migration
  • Parallel sync between old and new stores
  • Automated reconciliation before switching
  • Data preparation for analytics and AI
Plan a data migration

UI/UX Modernization

Bring the product experience up to date along with the code behind it.

  • UX audit and friction mapping
  • UX strategy aligned to business goals
  • Redesign of the current product experience
Refresh the experience

AI-Assisted Code Transformation

Use AI tooling to speed up the slow parts of modernization, with engineers reviewing every change.

  • Automated documentation of undocumented code
  • Assisted translation to modern languages and frameworks
  • Test generation for legacy modules before refactoring
  • Technical debt inventory and impact analysis
Accelerate with AI

Signs Your Legacy System Is Holding You Back

  • Every release is a risk

    Small changes break unrelated features, so releases slow down and pile up.

  • Knowledge lives in a few heads

    Documentation is outdated and only a couple of engineers understand the core logic.

  • Hiring is getting harder

    Few developers want to work with an outdated stack, and those who do are expensive.

  • Integrations are painful

    Connecting new SaaS tools, partners or AI services needs custom workarounds every time.

  • Costs keep growing

    Licenses, extended vendor support and aging hardware eat the budget for new features.

  • Security gaps

    Unsupported frameworks and libraries no longer receive security patches.

Systems We Modernize

  • ERP, CRM and back-office systems

  • Financial, billing and payment platforms

  • Java EE, .NET Framework and Oracle Forms applications

  • Customer and partner portals

  • Data warehouses and reporting systems

  • Outdated mobile apps and their backends

  • Internal workflow and document management tools

Zero-Downtime Migration Path

  • 1

    Assess

    Audit code, data and infrastructure; agree on the target architecture and the order of modernization.

  • 2

    Stabilize

    Add tests, monitoring and CI around the legacy system so changes stop being risky.

  • 3

    Extract

    Route traffic through an API layer and move modules into new services one by one.

  • 4

    Migrate

    Sync data between old and new stores and run both in parallel until results match.

  • 5

    Retire

    Switch over, decommission legacy components and hand over documentation.

How We Keep Modernization Safe

  • Incremental releases

    Change is delivered in small, reversible steps instead of one cut-over weekend.

  • Parallel run

    Old and new components run side by side and results are compared before switching.

  • Safety net of tests

    Characterization tests capture current behaviour before any refactoring begins.

  • Feature flags and rollback

    Every switch can be turned off in minutes if something goes wrong.

  • Data integrity checks

    Automated reconciliation confirms nothing is lost or changed during migration.

  • Observability

    Monitoring and alerting are in place before traffic moves to new services.

What Modernization Delivers

  • Faster, safer releases

  • Lower infrastructure and license costs

  • Scaling on demand in the cloud

  • Supported, patched technology stack

  • Open APIs for partners and new tools

  • Clean data ready for analytics and AI

How We Work Together

Start with a short assessment at a fixed price, then modernize in waves you can plan, review and stop at any point.

  • Assessment

    Fixed price

    A clear picture of the system and a realistic plan, with no obligation to continue. Takes 2-4 weeks.

    • Audit of code, data and infrastructure
    • Risks, technical debt and quick wins
    • Phased roadmap with an estimate
    Request an assessment

  • Modernization

    Time and material, capped per wave

    A dedicated engineering team works through the roadmap one wave at a time. Each wave has an agreed scope and a budget cap.

    • Architect, developers, QA and DevOps
    • Regular demos and transparent reporting
    • Priorities can change between waves
    Plan the first wave

Keep the new system running

After the final wave, your team can take over with full documentation, or we can keep the system monitored and supported.

See maintenance and support

Modernization Case Studies

Judge by what our clients tell about us

  • Legacy marketing application modernization solution

    Smartym Pro migrated our solution to a more scalable digital form and integrated technologies such as iBeacon and chatbots. The team is now extending the platform with blockchain smart contracts between partners.

    CEO, Marketing solutions firm

    5.0 / 5.0Logo Clutch company

  • Legacy system modernization for trucking mobile platform

    Smartym Pro updated our iOS app with current tooling, refreshed frameworks, and cleaned up legacy code — performance improved noticeably. They also delivered a modern design aligned with current platform guidelines.

    President, Trucking Platform

    5.0 / 5.0Logo Clutch company

  • Mobile app modernization for Loyalty System

    Smartym Pro's application modernization work helped us hit two goals: stronger customer loyalty at the point of sale and less back-and-forth between merchant and customer — shorter interactions and fewer errors.

    Co-founder, Loyalty system

    5.0 / 5.0Logo Clutch company

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Frequently Asked Questions

A full rewrite rarely pays off for a system that runs the business: it freezes new features for months and often loses hidden business rules. We recommend incremental modernization and reserve rewrites for small, isolated modules.

The assessment takes 2-4 weeks. After that, the first services usually go live within a few months, and the full program is planned in phases so value is delivered long before the legacy system is retired.

Our goal is zero planned downtime. Traffic is switched gradually behind an API layer, data is synchronized in parallel, and every step can be rolled back.

Yes. We reconstruct documentation from code, database schemas and interviews with your team, using AI-assisted analysis to speed it up and engineers to verify the results.

Java EE and older Spring versions, .NET Framework, Oracle Forms and PL/SQL, PHP, AngularJS and legacy mobile stacks, among others.

Modern APIs, clean data pipelines and a documented domain model make it possible to plug in LLM assistants, AI agents and analytics without another round of rework.

The assessment has a fixed price. After that, each wave runs on time and material with an agreed budget cap, so you can review the results and decide on the next wave.

Your team can take over: we plan knowledge transfer from the start, with pair work, architecture records and runbooks. If you prefer, we can keep the system monitored and supported.

Ready to modernize your legacy system?

Start with an assessment — we will map risks, costs and a phased path to a modern architecture.