Kodelinesoftware engineering
Modernization

Legacy modernization is not priced by lines of code. What matters is production risk, test status, data model, dependencies, platform pressure, and critical workflows.

Entry

Audit and roadmap usually start from €6k

For mature systems, the first investment should create visibility: risks, critical paths, dependency state, data model, and modernization sequence.

  • Code-health and dependency audit
  • Risk ranking by business impact
  • Modernization roadmap with acceptance points
Delivery

Stabilization before big-bang migration

The most economical modernization is often incremental: secure critical paths, add tests, separate interfaces, then migrate frameworks, data access, or modules.

  • Regression tests for core processes
  • Strangler-fig, module, or API migration
  • Rollback options for data and release paths
Cost risk

Unclear data and missing tests drive effort

If only individual people understand the system, releases are manual, or data models grew historically, modernization first needs to regain knowledge and control.

  • Outdated frameworks, plugins, or SDKs
  • No automated tests for critical workflows
  • Hard-to-change database or integration logic
Sequence

Modernization rarely starts with the rewrite

The more economical sequence is often: understand the system, prioritize risks, secure critical paths, improve release capability, and only then migrate modules or frameworks.

  • Audit before migration
  • Tests and release control before large changes
  • Incremental decoupling instead of rebuild without a risk picture
Boundary

What is not automatically part of modernization

Modernization does not automatically mean new design, full data migration, or feature rebuild. These topics can be useful, but need to be evaluated separately from stabilization and risk reduction.

  • UI redesign and product strategy
  • Full data cleanup or new BI landscape
  • Complete rewrite of all modules without prioritized business case
Cost matrix

Budget matrix for legacy modernization

Legacy modernization is not priced by lines of code. What matters is production risk, test status, data model, dependencies, platform pressure, and critical workflows.

ScopeBudgetTypical scopeImportant risks
Audit / roadmapfrom €6kCode health, dependencies, critical paths, modernization sequenceNo large implementation yet; the goal is risk visibility
Stabilizationfrom €15kTests for core paths, release notes, dependency fixes, small refactoringsProduction risk and missing testability limit speed
Incremental migrationfrom €30kFramework, module, API, or data-access migration with rollback pathLegacy systems, data model, and integrations must keep working
Comprehensive modernizationfrom €75kSeveral modules, new architecture boundaries, data migration, operations, and handoverBusiness continuity, test status, and team capability determine effort
FAQ

Common questions on this topic

Legacy modernization is not priced by lines of code. What matters is production risk, test status, data model, dependencies, platform pressure, and critical workflows.

01

Why does modernization often start with an audit?

Because the largest risks in legacy systems are often invisible: missing tests, old dependencies, data coupling, manual releases, or single-person knowledge. An audit prevents budget from going into the wrong sequence.

02

Is a complete rewrite useful?

Rarely as a first step. Incremental modernization is often more economical because critical functions keep running, risks fall measurably, and new architecture boundaries emerge under control.

03

Why can legacy modernization be hard to estimate?

Because effort depends on test status, data quality, outdated frameworks, hidden dependencies, and production risk. These factors need to become visible before a reliable implementation price is possible.

Start your project

Tell us about your business logic.

We respond within one working day. The first call qualifies scope, constraints, budget corridor, risk, and fit. Architecture decisions are handled in a paid discovery or audit phase; fixed pricing follows only after reliable scope clarification.