AI-driven software migration

From legacyto Java —in one leap.

Springboard modernizes outdated business software into a modern Java, Spring Boot and React stack — with AI agents doing the heavy lifting and your team steering the course.

migrate COBOL → Java 21
Book an intro callSee the approach
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The problem

Outdated software gets costlier — and riskier — every day.

Not because it's broken. But because the world around it keeps moving while the code stands still. The bill comes later — and it comes hard.

~/coresystem — legacy → java
// legacy — logic intertwined, no types, no testsPROCEDURE DIVISION. COMPUTE WS-INTEREST = WS-BALANCE * 0.04. *> magic number IF WS-BALANCE > 10000 ... *> 6 levels deep → springboard: analyze · restructure · test · validate // Java 21 + Spring Boot — explicit, tested, maintainablerecord Account(BigDecimal balance) { BigDecimal annualInterest(InterestPolicy policy) { return policy.calculate(balance); // decoupled & testable }}
01

Knowledge walks out the door

The people who wrote the system have left or retired. What remains is code without context — and no one who dares to change it.

02

Security becomes untenable

Runtimes and frameworks without updates turn into an open door. Compliance and audits structurally lag behind reality.

03

Innovation stalls

Every new request takes a disproportionate amount of effort. The system slows you down where it should speed you up.

04

Chained to licenses

Per-user and platform licenses climb year after year, while you don't even own the code. Low-code platforms like Mendix or OutSystems make it worse: you build faster, but you're locked to a single vendor.

The approach

Four phases. Control at every step.

No big-bang rebuild. We move in manageable steps, with working software as the anchor — and a human signing off on every decision.

01

◇ Inventory & understanding

AI agents read the entire codebase and reconstruct the intent: which rules, which data flows, which behavior. Our team checks that reconstruction against practice and against your domain knowledge.

AI · codebase analysisHuman · domain validation
02

↗ Agentic refactor

Module by module, agents rewrite to idiomatic Java and Spring Boot — including tests that capture the existing behavior. Not a one-to-one translation, but a clean and explicit foundation.

AI · transformation & testsHuman · architecture & review
03

+ Validation & comparison

Old and new run side by side. We compare outcomes on real data until the behavior is provably identical. Only then is a module “done” — no assumptions, just evidence.

AI · regression comparisonHuman · acceptance
04

→ Phased go-live

Module by module to production, with a way back at every step. Your team works alongside us and takes over maintenance — with documentation that's actually correct and code that can carry itself.

AI · migration supportHuman · ownership
From X to Java

Where we start.
Where we land.

The source varies per engagement. The destination is consistent: a modern, tested Java stack your team can carry itself.

Source · legacy
COBOLmainframe
Mendix / OutSystemslow-code lock-in
Delphi / PowerBuilderdesktop
Visual Basic 6end-of-life
Java 1.x – 8outdated
.NET Frameworkmonolith
PL/SQL logicin the database
Destination · modern
Java 21 (LTS)future-proof
Your own code, no licensesfree
Spring Boot 3standard
React front-endmodern UI
Mobile appsiOS · Android
Tested domain layerreliable
CI/CD + automated testscontinuous
Container / cloud-readyscalable
Hosting fully in Europeprivacy
Docs that stay correcttransferable

Choosing Java is deliberate. Mature, broadly supported, and backed by a talent market that won't dry up for decades. You trade scarce, expensive legacy knowledge and recurring platform licenses for open-source code you own yourself — and that any Java developer can pick up.

Take the leap

One leap from legacy
to a safe landing.

The chasm looks wide. With the right push-off, the other side is closer than you think. Press the button and see how it works.

LEGACYCOBOL · Mendix · VB6 · .NET
JAVA · SPRING · REACTtested · maintainable · yours
Plan your leap
Why Springboard

AI accelerates. People decide. Always.

Agentic development is powerful, but without craftsmanship it's a risk. These are the principles we don't deviate from.

01

Humans in control

No line goes live without an engineer having understood and approved it. AI does the heavy lifting, not the final judgment.

02

Working software, not reports

We deliver running, tested modules — not slides about what might someday be possible.

03

No black box

You get readable code, tests and documentation. What the agents build, your team can maintain tomorrow.

04

Step by step, with a way back

Every phase is reversible. You never run the risk of an all-or-nothing migration.

The Springboard team at work in a modern Dutch software office
About us

The team behind the leap.

An involved team of software developers, Mendix experts and AI specialists. What drives us: building software that genuinely moves organizations forward. In a migration we stand beside you, not across from you — from design and development to maintenance, support and adoption.

We don't embrace AI as hype,
but as opportunity: building
faster and smarter, without
compromising on quality or security.

⚡

The speed of Mendix

Official Mendix partner. We know where low-code moves you forward — and where it locks you in.

◇

The flexibility of custom

Traditional development in Java, Spring and React for solutions that fit exactly — and that you own yourself.

↗

The power of AI

AI-assisted development speeds up the heavy lifting, while our engineers guard the course and the quality.

Official Mendix partnerISO 27001 certifiedBased in the Netherlands
Meet the whole team
Our clients

In good company.

Springboard is an initiative by JAM-IT. These organizations trust us with their software.

Gemeente Rotterdam
Gemeente Amsterdam
Siemens
Vereniging Eigen Huis
Quion
Loyalis
CMIS Nederland
Sim Groep
Netvice
Meeder Group
HLTsamen
VRR
Woonhave
Prikkl
LetsGoal
Erfrechtplan
Frequently asked questions

What clients ask us first.

That's the rule rather than the exception. The agents infer the real intent from the code itself and from behavior in production. We lay that reconstructed logic next to your domain knowledge — so implicit knowledge becomes explicit and recorded again.
Yes. Agents work in small, reviewable steps. Every change arrives as readable code with tests, which engineers assess before anything goes live. AI is the accelerator, not the autopilot.
That depends entirely on size, complexity and how much functionality is intertwined. So we always start with a scoped analysis of one part of the system, so we plan on facts instead of a shot in the dark.
That's the starting point. We capture existing behavior in tests before we rewrite, and run old and new side by side until the outcomes provably match. We only improve once the baseline is equal.
Either works. We work in your environment and with your security requirements, or deliver a cloud-ready setup your team manages itself. Hosting can be entirely within Europe — important for privacy and data protection (GDPR). Information security is assured: we're ISO 27001 certified. The code and the knowledge stay yours.
Java is mature, stable and has a deep, affordable talent market for the long term. For business-critical systems that must last decades, predictability outweighs hype.
Contact

Ready for the leap?

Start with a free legacy scan. We analyze one concrete part of your system and show what a migration to Java realistically involves — no obligation, no sales pitch.

We only use your details to reply.
info@jam-it.nl+31 6 33 13 94 23NetherlandsISO 27001 certifiedAn initiative by JAM-IT