Agentic modernization, delivered. Accurate, complete, on time.

Java Migration Services: Complex Migrations, Staged and Validated

A delivery team with validation evidence — not a codemod you run and hope.

Swimm’s Java migration services take on complex Java migrations directly, with clear scope, validation, and staged delivery from planning through execution — an expert engagement, not a self-serve platform. Swimm is a product-enabled service company. We combine deterministic analysis for accuracy, AI for scale, and SMEs to catch what tools miss.

The problem

The cost of touching your Java estate keeps going up

Every year a Java estate goes untouched, the cost of eventually touching it goes up.

Aging Java estates accumulate risk. Unsupported versions, brittle builds, and fewer engineers who remember why things were built the way they were.

Upgrade paths get blocked by undocumented dependencies. The upgrade looks straightforward until it hits a dependency nobody mapped.

In-house attempts drift and stall. Migration projects run by internal teams alongside their regular workload tend to lose momentum — and budget.

AI-best-effort output can't be trusted in production. Code that "looks right" from an automated tool still needs a human who understands the system to confirm it actually is right.

How it works

Three layers, working together

01 · Deterministic

Deterministic analysis establishes ground truth

Deterministic analysis maps dependencies, entry points, data flows, dead code, and cross-repo relationships across your Java estate before anything changes.

02 · AI

AI coordinates context at scale

AI applies verified migration patterns at scale, anchored in that analysis.

03 · SME

SMEs validate before it ships

SMEs validate every deliverable — no "AI-best-effort" output ships to production.

Deterministic → AI → SME

A staged engagement

Assessment

A scoped plan, risks, and success criteria for your Java estate.

Specification

Extracts the behavior the migration needs to preserve.

Modernization

Executes the migration with visible progress throughout.

Enablement

Hands off test suites, playbooks, and training.

What you get

A workspace, not a stack of files

Every deliverable lives in one place. Yours to keep, queryable by your tools.

Delivered change

Extracted services and APIs
Refactored web and mobile clients
API contracts and schemas
One source of truth for business logic

System understanding

Logic distribution map
Architecture and dependency maps
Dead-code and duplication analysis
Critical flow documentation
Queryable by MCP

Enablement assets

Parity test suite
Extraction playbooks
Team training
Queryable knowledge base

Book a scoping call

Works with the tools you've already chosen

Methodology built and led by Swimm's founders — Oren, CEO · Gilad, CTO. Every deliverable ships with validation evidence.

Frequently asked questions

Is Swimm's Java migration a service or a migration tool?

It’s a service — Swimm’s team executes the migration, using a proprietary analysis engine and AI to do it accurately and at scale. You’re not buying software to run yourself.

How does Swimm handle undocumented dependencies in Java systems?

Our deterministic engine maps dependencies, entry points, data flows, and cross-repo relationships before we touch any code, so blind spots surface during Assessment, not mid-migration.

How do we track progress during a Java migration?

Through a live customer workspace with staged delivery — you see progress as it happens, not just at the end of the project.

What guarantees accuracy in an AI-assisted Java migration?

AI is anchored in the static analysis of your actual system, and SMEs validate the output before it ships. Nothing goes to production on an “AI-best-effort” basis.

Can we start small before committing to a full Java migration?

Yes — Assessment is the entry point, and each stage after it builds on the last and stands on its own value.

Complex Java migrations, staged and validated